<Page>
EXHIBIT 3.13
ARTICLES OF INCORPORATION
OF
AMERIPATH CONSOLIDATED LABS, INC.
ARTICLE I - NAME
The name of the corporation is AmeriPath Consolidated Labs, Inc.
(hereinafter called the "Corporation").
ARTICLE II - CAPITAL STOCK
The aggregate number of shares of capital stock which the Corporation shall
have the authority to issue is 1,000 shares of Common Stock, par value $.01 per
share.
ARTICLE III - PRINCIPAL OFFICE ADDRESS
The street address and mailing address of the principal office of the
Corporation is 72S9 Garden Road, Suite 200, Riviera Beach, Florida 33404.
ARTICLE IV - INITIAL BOARD OF DIRECTORS
The Corporation's Board of Directors (the "Board") shall consist of not
fewer than one (1) nor more than five (5) directors, and shall initially consist
of three (3) directors. The number of directors within these limits may be
increased or decreased from time to time as provided in the By-laws of the
Corporation. The names and addresses of the initial directors of the Corporation
are as follows:
James C. New
c/o AmeriPath, Inc.
7289 Garden Road
Suite 200
Riviera Beach, Florida 33404
Brian C. Carr
c/o AmeriPath, Inc.
7289 Garden Road
Suite 200
Riviera Beach, Florida 33404
Gregory A. Marsh
c/o AmeriPath, Inc.
7289 Garden Road
Suite 200
Riviera Beach, Florida 33404
<Page>
ARTICLE V - INITIAL REGISTERED AGENT
The street address of the initial registered office of the Corporation is
1201 Bays Street, Tallahassee, Florida 32301 and the name of the initial
registered agent of the Corporation at that address is Corporation Service
Company.
ARTICLE VI - INCORPORATOR
The name and address of the incorporator of the Corporation is Shannon E,
Pinkston, Alston & Bird LLP, 1201 West Peachtree Street, Atlanta, Georgia
30309-3424.
ARTICLE VII - LIMITATION ON DIRECTOR LIABILITY
The liability of a director of the corporation shall be eliminated or
limited to the fullest extent permitted by the Florida Business Corporation Act.
If the Florida Business Corporation Act is hereby amended to further eliminate
or limit the personal liability of directors, then the liability of a director
of the corporation shall be eliminated or limited to the fullest extent
permitted by the Florida Business Corporation Act, as so amended.
ARTICLE VIII - INDEMNIFICATION
The Corporation shall indemnify and advance expenses to, and may purchase
and maintain insurance on behalf of, its officers and directors to the fullest
extent permitted by Law as now or hereafter in effect. Without limiting the
generality of the foregoing, the By-laws may provide for indemnification and
advancement of expenses to officers, directors, employees and agents on such
terms and conditions as the Board may from time to time deem appropriate or
advisable.
ARTICLE IX - BY-LAWS
The Board shall have the power to adopt, amend or repeal the By-laws of the
Corporation or any part thereof.
-2-
<Page>
ARTICLE X - AMENDMENT
These Articles of Incorporation may be altered, amended or repealed by the
Shareholders of the Corporation in accordance with the applicable provisions of
Florida law.
IN WITNESS WHEREOF, the incorporator has executed these Articles of
Incorporation of AmeriPath Consolidated Labs, Inc. this 31st day of December,
2001.
/s/ Shannon E. Pinkston
----------------------------
Shannon E. Pinkston
Incorporator
-3-