UNITED STATES
                        SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549

                                    FORM 10-Q

(Mark one)
           /X/  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                 For the quarterly period ended December 31, 1999
                                                -----------------
                                        OR

           / / TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                         Commission File Number:  0-27854

                          BONE CARE INTERNATIONAL, INC.
              (Exact name of registrant as specified in its charter)

Wisconsin                              2834                    39-1527471
(State of                   (Primary Standard Industry)     (IRS Employer
Incorporation)              Classification Code Number      Identification No.)

                                One Science Court
                             Madison, Wisconsin 53711
                         (Address, including zip code of
                      Registrant's principal executive offices)

                                    608-236-2500
                 (Registrant's telephone number, including area code)


Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.

                                                         Yes   X       No
                                                             -----       -----
As of January 31, 2000, 11,410,254 shares of the registrant's Common Stock, no
par value, were outstanding.

                  BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY

                                    FORM 10-Q

                 For the quarterly period ended December 31, 1999

                                TABLE OF CONTENTS
                                -----------------
PART I -  FINANCIAL INFORMATION                                            Page
                                                                           ----
Item 1.   Financial statements

          Consolidated Balance Sheets
          December 31, 1999, and June 30, 1999 . . . . . . . . . . . . . .  .3

          Consolidated Statements of Operations
          Three and Six Months Ended December 31, 1999
          and 1998 . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .5

          Consolidated Statements of Cash Flows
          Six Months Ended December 31, 1999
          and 1998 . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .6

          Notes to Consolidated Financial Statements . . . . . . . . . . .  .7

Item 2.   Management's Discussion and Analysis of Financial
          Condition and Results of Operations. . . . . . . . . . . . . . .  .8

Item 3.   Quantitative and Qualitative Disclosures about Market Risk . . .  .9

PART II -      OTHER INFORMATION

Item 1.   Legal Proceedings. . . . . . . . . . . . . . . . . . . . . . . .  10

Item 2.   Changes in Securities and Use of Proceeds. . . . . . . . . . . .  10

Item 4.   Submission of Matters to a Vote of Security Holders. . . . . . .  10

Item 5.   Other Information. . . . . . . . . . . . . . . . . . . . . . . .  11

Item 6.   Exhibits and Reports on Form 8-K . . . . . . . . . . . . . . . .  11

SIGNATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12

EXHIBIT INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13

PART I.  FINANCIAL INFORMATION
Item 1.  Financial Statements
         --------------------

BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY
Consolidated Balance Sheets

- -------------------------------------------------------------------------------
Assets
- -------------------------------------------------------------------------------
                                               December 31,      June 30,
                                                  1999             1999
                                               (Unaudited)      (Audited)
- -------------------------------------------------------------------------------
Current assets:
 Cash and cash equivalents                       $6,572,375     $7,313,551
 Marketable securities                            6,989,458           _
 Trade receivables                                  470,859           _
 Inventory                                        1,113,805      1,119,262
 Other current assets                               519,892        110,017

- -------------------------------------------------------------------------------
Total current assets                             15,666,389      8,542,830

Property, plant and equipment--at cost:
 Leasehold improvements                              97,319         97,319
 Furniture and fixtures                             103,851        101,144
 Machinery and other equipment                      723,143        579,008

- -------------------------------------------------------------------------------
                                                    924,313        777,471

Less accumulated depreciation                       540,209        467,879

- -------------------------------------------------------------------------------
Property, plant and equipment, net                  384,104        309,592

Patent fees, net of accumulated
 amortization of $733,669 at
 December 31, 1999, and $645,013
 at June 30, 1999                                 1,036,427        862,645
Excess of cost over fair value of
 net assets acquired, net of
 accumulated amortization of
 $866,580 at December 31, 1999, and
 $821,856 at June 30, 1999                          493,337        538,061
Other non-current assets                             18,817         50,133
- -------------------------------------------------------------------------------
Total assets                                    $17,599,074    $10,303,261
===============================================================================

See accompanying notes to consolidated financial statements.

BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY
Consolidated Balance Sheets


- -------------------------------------------------------------------------------
Liabilities and Shareholders' Equity

- -------------------------------------------------------------------------------
                                               December 31,      June 30,
                                                   1999            1999
                                                (Unaudited)     (Audited)
- -------------------------------------------------------------------------------
Current liabilities:
 Accounts payable                                $  353,648    $   202,686
 Accrued liabilities:
 Accrued clinical study and
    research costs                                  213,838        171,988
 Compensation payable                               125,768         43,311
 Other                                              313,366         43,477
 Deferred revenue                                      _           125,000

- -------------------------------------------------------------------------------
Total current liabilities                         1,006,620        586,462

Shareholders' equity:
 Preferred stock-authorized 2,000,000
  shares of $.001 par value; none issued               _              _
 Common stock-authorized 28,000,000
  shares of no par value; issued and
  outstanding 11,407,454 shares at
  December 31, 1999 and 10,173,396
  at June 30, 1999                               11,393,883     11,393,883
 Additional paid-in capital                      25,132,872     14,119,761

- -------------------------------------------------------------------------------
                                                 36,526,755     25,513,644

Accumulated deficit                             (19,922,831)   (15,796,845)
Accumulated other comprehensive loss                (11,470)          _

- -------------------------------------------------------------------------------
                                                 16,592,454      9,716,799

- -------------------------------------------------------------------------------
Total liabilities and shareholders'
 equity                                         $17,599,074    $10,303,261

===============================================================================
See accompanying notes to consolidated financial statements.


BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY
Consolidated Statements of Operations
(Unaudited)
- -----------------------------------------------------------------------------
                          Three months ended           Six months ended
                          ------------------           ----------------
                       December 31,  December 31,  December 31,  December 31,
                           1999          1998          1999          1998
- -----------------------------------------------------------------------------
REVENUES               $ 631,627     $    _        $ 631,627     $     _

COST OF SALES             87,795          _           87,795           _

- -----------------------------------------------------------------------------
GROSS MARGIN             543,832     $    _          543,832           _

- -----------------------------------------------------------------------------
OPERATING EXPENSES
Research & development 1,090,015       788,236     2,083,023      1,673,943
Sales and marketing    1,337,810       562,877     2,118,148        930,793
General and
 administrative          448,696       217,732       747,504        571,353
- -----------------------------------------------------------------------------
                       2,876,521     1,568,845     4,948,675      3,176,089

- -----------------------------------------------------------------------------
Loss from operations  (2,332,689)   (1,568,845)   (4,404,843)    (3,176,089)

- -----------------------------------------------------------------------------
Interest Income          202,184       128,031       291,358        313,820

- -----------------------------------------------------------------------------
Loss before income
 tax                  (2,130,505)    (1,440,814)  (4,113,485)    (2,862,269)

Income tax expense        12,500           _          12,500           _

- -----------------------------------------------------------------------------

NET LOSS             $(2,143,005)   $(1,440,814)  $(4,125,985)  $(2,862,269)

=============================================================================
Net loss per common
 share - basic           $(0.19)        $(0.14)       $(0.38)       $(0.29)

=============================================================================
Weighted average number
 of common shares     11,245,295     10,136,213    10,709,346     9,963,020

=============================================================================
See accompanying notes to consolidated financial statements.


BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY
Consolidated Statements of Cash Flows
(Unaudited)
- --------------------------------------------------------------------------
                                                   Six months ended
                                                   -----------------
                                               December 31,   December 31,
                                                    1999           1998
- --------------------------------------------------------------------------
Cash flows from operating activities:
 Net loss                                     $(4,125,985)   $ (2,862,269)
 Adjustments to reconcile net loss
  to net cash used in operating activities:
 Depreciation and amortization                    237,092         213,774
 Changes in assets and liabilities:
    Trade receivables                            (470,859)           _
    Inventory                                       5,457        (698,769)
    Other current assets                         (409,875)        (90,723)
    Accounts payable                              150,962         315,705
    Accrued liabilities                           269,196           3,825
    Other                                          31,316          18,816
- --------------------------------------------------------------------------
Net cash used in operating
  activities                                  $(4,312,696)   $ (3,099,641)
- --------------------------------------------------------------------------
Cash flows from investing activities:
 Purchases of marketable securities            (7,000,928)            _
 Additions to property,
  plant and equipment                            (146,842)       (105,264)
 Additions to patent fees                        (293,820)       (118,443)
- --------------------------------------------------------------------------
Net cash used in investing
  activities                                  $(7,441,590)   $   (223,707)
- --------------------------------------------------------------------------
Cash flows from financing activities:
 Proceeds from exercise of
  stock options                                    37,500           29,170
 Net proceeds from issuance of
  common stock                                 10,975,610       10,567,504
- --------------------------------------------------------------------------
Net cash provided by (used in)
 financing activities                         $11,013,110   $   10,596,674
- --------------------------------------------------------------------------
Net increase (decrease) in cash
 and cash equivalents                           (741,176)      7,273,326
Cash and cash equivalents at
 beginning of period                            7,313,551      3,484,374
- --------------------------------------------------------------------------
Cash and cash equivalents at
 end of period                                 $6,572,375    $10,757,700
==========================================================================
See accompanying notes to consolidated financial statements.

                BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY
                 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                 (Unaudited)

(1)     BASIS OF PRESENTATION

   The consolidated financial statements presented herein have been prepared
by Bone Care International, Inc., without audit, except for balance sheet
information at June 30, 1999, pursuant to the rules of the Securities and
Exchange Commission for quarterly reports on Form 10-Q and do not include
all of the information and note disclosures required by generally accepted
accounting principles for annual financial statements.  These statements
should be read in conjunction with the consolidated financial statements and
notes thereto for the year ended June 30, 1999, included in the Company's
Form 10-K as filed with the Securities and Exchange Commission on September
20, 1999.

    In the opinion of management the information included herein reflects
all adjustments (consisting of normal, recurring adjustments) necessary for
a fair presentation of results for these interim periods.  The results of
operations for the interim periods ended December 31, 1999, are not
necessarily indicative of the results to be expected for the entire fiscal
year ending June 30, 2000.


(2)     COMMON STOCK

   In October 1999, Bone Care completed a directed public offering of
1,229,058 shares of common stock at a price of $9.02 per share.  Bone Care
received proceeds of $10,975,610 from the sale, net of offering expenses.

   In July 1998, Bone Care completed a directed public offering of
1,326,000 shares of common stock at a price of $8.00 per share.  Bone Care
received proceeds of $10,567,504 from the sale, net of offering expenses.
Certain directors of Bone Care purchased 276,000 of the shares sold.

(3)     NET LOSS PER SHARE

   Basic loss per share is computed by dividing net loss by the weighted
average number of shares of common stock outstanding during the period.
Diluted per share data is not presented as the effect of potentially issuable
common shares would be antidilutive.


Item 2.      Management Discussion and Analysis of Financial Condition and
             ------------------------------------------------------------
             Results of Operations
             ---------------------

Results of Operations
- ---------------------
   Revenues for the quarter ended December 31, 1999 include $485,527 related to
initial sales of Hectorol Capsules and $125,000 from a licensing agreement
which expired in December.  Margins on product sales were $397,732 or 82% of
sales, which is in line with management expectations.  Bone Care had no
revenues in the six months ended December 31, 1998 or three months ended
September 30, 1999.

   Research and development expenses increased to $1,090,015 in the three
months ended December 31, 1999, from $788,236 in the three months ended
December 31, 1998 and to $2,083,023 in the six months ended December 31,
1999 from $1,673,943 in the six months ended December 31, 1998.  Research
and development expenses increased from prior year levels due to the following:
(1) research on Hectorol Injection, (2) development of a lower strength
formulation of Hectorol Capsules, (3) continuation of Phase 3 clinical trials
in pre-dialysis patients suffering from secondary hyperparathyroidism (SHP),
(4) continuation of a Phase 2 clinical trial with Hectorol Capsules in patients
with advanced metastatic prostate cancer, and (5) manufacture of LR-103 for use
in planned Phase 1 clinical tests.

   Sales and marketing expenses increased $774,933 to $1,337,810 in the three
months ended December 31, 1999, from $562,877 in the three months ended
December 31, 1998.  In the six months ended December 31, 1999, sales and
marketing expenses increased $1,187,355 to $2,118,148 from $930,793 in the six
months ended December 31, 1998.  The increase in sales and marketing expenses
are related to the establishment of a 17 person sales force and related
marketing expenditures in connection with the October 1999 U.S. launch of
Hectorol Capsules.

   General and administrative expenses increased $230,964 to $448,696 in the
three months ended December 31, 1999, from $217,732 in the three months ended
December 31, 1998.  In the six months ended December 31, 1999, general and
administrative expenses increased $176,151 to $747,504 from $571,353 in the six
months ended December 31, 1998.  Bone Care contracted with an independent
company in October 1999 to warehouse and distribute Hectorol Capsules and also
invoice and collect customer receivables.  The increase in general and
administrative expenses are primarily attributable to this contract.

   Interest income increased $74,153 to $202,184 in the three months ended
December 31, 1999 from $128,031 in the three months ended December 31, 1998.
Interest income decreased $22,462 to $291,358 in the six months ended December
31, 1999 from $313,820 in the six months ended December 31, 1998.  The increase
in interest income in the three months ended December 31, 1999 was due to the
higher average cash balances during the periods subsequent to the October 1999
common stock offering.  The decrease in interest income in the six months ended
December 31, 1999 was due to lower average cash balances during that period.



Liquidity and Capital Resources
- -------------------------------

   In October 1999, Bone Care completed a directed public offering of 1,229,058
shares of common stock at a price of $9.02 per share.  Bone Care received
proceeds of approximately $10,975,610 from the sale, net of offering expenses.
Prior to October 1999, approximately $110,500 of offering expenses were
incurred.

   In July 1998, Bone Care completed a directed public offering of 1,326,000
shares of common stock at a price of $8.00 per share. Bone Care received
proceeds of approximately $10,567,504 from the sale, net of offering expenses.
Prior to June 30, 1998, approximately $298,000 of offering expenses were
incurred.  Certain directors of Bone Care purchased 276,000 of the shares sold.

   Bone Care will require substantial funds for its research and development
programs, preclinical and clinical testing, operating expenses, regulatory
processes and manufacturing and marketing programs.  Bone Care's capital
requirements will depend on numerous factors, including the progress of its
research and development programs; the progress of preclinical and clinical
testing; the time and cost involved in obtaining regulatory approvals; the cost
of filing, prosecuting, defending and enforcing any patent claims and other
intellectual property rights; competing technological and market developments;
changes and development in Bone Care's existing licensing relationships and the
terms of any new collaborative, licensing, co-promotion or distribution
arrangements that Bone Care may establish; the progress of commercialization
and marketing activities; the cost of manufacturing preclinical and clinical
products; and other factors not within Bone Care's control. Bone Care believes
that the current level of cash and cash equivalents should be sufficient to
fund its operations through December 2000.

   Cash, cash equivalents, and marketable securities were $13,561,833 at
December 31, 1999 and $7,313,551 at June 30, 1999.  The increase was primarily
due to the investment of $7,000,928 in marketable securities after the receipt
of net proceeds of  $10,975,610 from the October 1999 common stock offering,
offset by the net loss of $4,125,985.  Bone Care invested these proceeds in
U.S. government agency and corporate debt.  During the six months ended
December 31, 1999 and 1998, cash used in operating activities aggregated
$4,312,696 and $3,099,641, respectively.  The increase in cash used is
attributable to the increased net loss due to marketing activities related to
the launch of Hectorol and the increase in trade receivables resulting from the
first commercial sales of Hectorol capsules in the second quarter ended
December 31, 1999.  Cash flows used in investing activities increased to
$7,441,590 in the six months ended December 31, 1999, from $223,707 in the
comparable 1998 period primarily due to the investment of $6,989,458 in
marketable securities.


Item 3.      Quantitative and Qualitative Disclosure About Market Risk
             ---------------------------------------------------------
   Bone Care's sales from inception to date have been made to U.S. customers
and, as a result, do not carry any exposure to factors such as changes in
foreign markets.  At December 31, 1999, Bone Care did not hold any short- or
long-term investments other than short-term investment grade securities and,
therefore, did not have any market risk exposure related to changes in interest
rates required to be disclosed pursuant to this item.  Therefore, no
quantitative tabular disclosures are required.


   PART II - OTHER INFORMATION
            BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY



Item 1.      Legal Proceedings
             -----------------
                  Bone Care may be a defendant from time to time in
             actions arising out of its ordinary course of business
             operations.  Bone Care believes that none of the matters in
             which it is currently involved, either individually or in
             the aggregate, is material to Bone Care.

Item 2.      Changes in Securities
             ---------------------
                  In connection with a directed public offering of
             1,326,000 shares of common stock (the "Offering") in 1998,
             Bone Care filed a Registration Statement on Form S-1, SEC
             File No. 333-43923 ("Registration Statement"), which was
             declared effective by the Commission on July 22, 1998.  The
             net proceeds from the Offering to the Company after total
             expenses was $10,270,000.

                  Through December 31, 1999, Bone Care has used
             approximately  $9,300,000 of the net proceeds from the
             offering.  The net proceeds not yet utilized have been
             invested in short-term, investment grade, interest-bearing
             financial instruments. The use of proceeds from the
             Offering does not represent a material change in the use of
             proceeds described in the prospectus which is part of the
             Registration Statement.

Item 3.      Defaults Upon Senior Securities
             -------------------------------
                  None

Item 4.      Submission of Matters to a Vote of Security Holders
             ---------------------------------------------------
                  The 1999 Annual Meeting of Shareholders ("Annual Meeting")
             of Bone Care was held on November 17, 1999.  The total number
             of shares of Bone Care's common stock, no par value per share,
             outstanding as of October 8, 1999, the record date of the
             Annual Meeting, was 10,173,396.  Management of Bone Care
             solicited proxies pursuant to Section 14 of the Securities
             Exchange Act of 1934, as amended, and Regulation 14A promulgated
             thereunder for the Annual Meeting.  Two directors, Martin Barkin,
             M.D. and Charles Klimkowski, C.F.A., were elected to serve until
             the 2002 Annual Meeting of Shareholders.  Martin Barkin, M.D.,
             was elected by a vote of 9,002,538 votes "FOR"; no votes
             "AGAINST"; and 24,934  "WITHHELD AUTHORITY".  Charles
             Klimkowski, C.F.A., was elected by a vote of 9,002,038
             votes "FOR"; no votes "AGAINST"; and 25,434  "WITHHELD
             AUTHORITY".

Item 5.      Other Information
             -----------------

                  In addition to the historical information included in
             this Quarterly Report on Form 10-Q, the Quarterly Report
             contains "forward-looking statements" made pursuant to the
             safe harbor provisions of Section 27A of the Securities Act
             of 1933.  These statements are based on management's beliefs
             as well as assumptions made by and information currently
             available to management.  Such forward-looking statements
             involve known and unknown risks, uncertainties, and other
             factors which may cause the actual results, performance, or
             achievements of Bone Care to be materially different from
             any future results, performance, or achievements expressed or
             implied by such forward-looking statements.  Such factors
             include, among others, Bone Care's early stage of development,
             Bone Care's ability to obtain regulatory approvals of intravenous
             Hectorol, the uncertainty of Bone Care's future profitability,
             the uncertainty of regulatory approvals of any drugs developed
             by Bone Care, uncertainty regarding ongoing governmental
             regulation, Bone Care's ability to obtain regulatory approvals
             in foreign countries, the uncertainty of Bone Care's ability to
             protect its intellectual property, Bone Care's ability to avoid
             infringing upon the intellectual property of third parties, the
             uncertainty related to pricing and reimbursement of Bone Care's
             products, health care reform and changes in the health care
             industry, the intense competition in the pharmaceutical and
             biotechnology industries, Bone Care's potential need for
             additional partners or collaborators, Bone Care's future capital
             needs and uncertainty of additional financing, Bone Care's lack
             of manufacturing capabilities and limited sales and marketing
             experience, product liability risks, and Bone Care's ability to
             retain and attract personnel.  Readers should also carefully
             review the risk factors set forth in other reports or documents
             Bone Care has filed from time to time with the Securities and
             Exchange Commission.  Given these uncertainties, readers are
             cautioned not to place undue reliance on such forward-looking
             statements.  Bone Care disclaims any obligation to update any such
             factors or to publicly announce any revisions to any of the
             forward-looking statements contained herein to reflect future
             events or developments.

Item 6.      Exhibits and Reports on Form 8-K
             --------------------------------
             (a)  Exhibits furnished:

                  (11)  Statement Re: Computation of Loss Per Share
                  (27)  Financial Data Schedule

             (b)  Reports on Form 8-K

                  No reports on Form 8-K were filed by the Company
                  during the quarter ended December 31, 1999.
                             SIGNATURES


   Pursuant to the requirements of the Securities Exchange Act of
1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned thereunto duly authorized.



                                      BONE CARE INTERNATIONAL, INC.
                                      (Registrant)




Date:  February 11, 2000              /s/ Charles W. Bishop
- ------------------------              --------------------------------
                                      Charles W. Bishop
                                      President and Chief
                                      Executive Officer
                                      (Principal Executive Officer)




Date:  February 11, 2000           /s/ Robert A. Beckman
- ------------------------              --------------------------------
                                      Robert A. Beckman
                                      Acting Vice President - Finance
                                     (Principal Financial and
                                      Accounting Officer)

              BONE CARE INTERNATIONAL, INC., AND SUBSIDIARY

                              Exhibit Index

            For the Quarterly Period Ended December 31, 1999

No.          Description                                             Page
- ---          -----------                                             ----
11 Statement Regarding Computation of Loss Per Share . . . . . . . . . 14

27 Financial Data Schedule . . . . . . . . . . . . . . . . . . . . . . 15