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EXHIBIT 21
SUBSIDIARIES OF THE REGISTRANT
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
U.S. PT - Delaware, Inc. Corporation Delaware
U.S. Therapy, Inc. dba The
Facilities Group, Inc. Corporation Texas
National Rehab GP, Inc. Corporation Texas
National Rehab Delaware, Inc. Corporation Delaware
U.S. PT - Michigan, Inc. Corporation Delaware
HH Rehab Associates, Inc. dba
Genesee Valley Physical Therapy
dba Theramax Physical Therapy Corporation Michigan
dba Rebound Physical Therapy Corporation Michigan
Professional Rehab Services, Inc.
dba Northwoods Physical Therapy
dba Thibodeau Physical Therapy
dba Evergreen Physical Therapy Corporation Michigan
U.S. Physical Therapy, Ltd. Limited Partnership Texas
U.S. PT Management, Ltd. Limited Partnership Texas
National Rehab Management
GP, Inc. Corporation Texas
Rehab Partners #1, Inc. Corporation Texas
Rehab Partners #2, Inc. Corporation Texas
Rehab Partners #3, Inc. Corporation Texas
Rehab Partners #4, Inc. Corporation Texas
Rehab Partners #5, Inc. Corporation Texas
Rehab Partners #6, Inc. Corporation Texas
U.S. PT Payroll, Inc. (formerly
Rehab Partners #7, Inc.) Corporation Texas
Rehab Partners Acquisition
#1, Inc. Corporation Texas
U.S. PT Therapy Services, Inc.
(formerly U.S. Surgical
Partners, Inc.) dba Cornerstone
Physical Therapy Corporation Delaware
US PT Therapy Services Inc. dba
Waco Sports Medicine and Rehabilitation Corporation Texas
U.S. Surgical Partners #1, Inc. Corporation Texas
Effingham Ambulatory Surgery
Center, L.P. (formerly U.S.
Surgical Partners of College
Park, Limited Partnership Limited Partnership Texas
U.S. Surgical Partners #2, Inc. Corporation Texas
Midland Surgical Partners, Ltd. Limited Partnership Texas
U.S. PT Turnkey Services, Inc.
(formerly Surgical Management
GP, Inc. Corporation Texas
U.S. Surgical Partners
Management, Ltd. Limited Partnership Texas
Southeastern Hand Rehabilitation,
Inc. dba Reist Hand Therapy
dba Achieve Physical Therapy Corporation Florida
Action Physical Therapy
Clinic, Ltd. Limited Partnership Texas
Cypresswood Physical
Therapy Centre, Ltd. Limited Partnership Texas
Progressive Physical
Therapy Clinic, Ltd. Limited Partnership Texas
Virginia Parc Physical
Therapy, Ltd. dba
McKinney Physical Therapy
Associates Limited Partnership Texas
Dearborn Physical Therapy,
Ltd. dba Advanced
Physical Therapy Limited Partnership Texas
Saline Physical Therapy of
Michigan, Ltd. dba Physical
Therapy in Motion Limited Partnership Texas
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
R. Clair Physical Therapy,
Limited Partnership Limited Partnership Texas
Roepke Physical Therapy,
Limited Partnership Limited Partnership Texas
Merrill Physical Therapy,
Limited Partnership Limited Partnership Texas
Joan Ostermeier Physical
Therapy, Limited
Partnership dba Sport &
Spine Clinic of Wittenberg Limited Partnership Texas
Crossroads Physical Therapy,
Limited Partnership Limited Partnership Texas
Kelly Lynch Physical Therapy,
Limited Partnership Limited Partnership Texas
U.S. PT Michigan #1, Limited
Partnership Limited Partnership Texas
Spracklen Physical Therapy,
Limited Partnership Limited Partnership Texas
Bosque River Physical Therapy
and Rehabilitation, Limited
Partnership Limited Partnership Texas
Frisco Physical Therapy, Limited
Partnership Limited Partnership Texas
Spinal Therapy Institute,
Limited Partnership Limited Partnership Texas
Sport & Spine Clinic of Fort
Atkinson, Limited Partnership Limited Partnership Texas
Sport & Spine Clinic of
Auburndale, Limited Partnership Limited Partnership Texas
Back in Balance, Limited
Partnership Limited Partnership Texas
Kingwood Physical Therapy, Ltd. Limited Partnership Texas
Enid Therapy Center,
Limited Partnership Limited Partnership Texas
Town & Country Physical Therapy
Limited Partnership Limited Partnership Texas
Spectrum Physical Therapy,
Limited Partnership Limited Partnership Texas
Southwind Physical Therapy,
Limited Partnership Limited Partnership Texas
Genesis Rehabilitation and
Sports Center - Jackson,
Limited Partnership dba
Genesis Physical Therapy Group Limited Partnership Texas
Cleveland Physical Therapy, Ltd. Limited Partnership Texas
Aquatic and Orthopedic Rehab
Specialists, Limited
Partnership dba Oceanside
Physical Therapy Limited Partnership Texas
Vileno Therapy of Treasure
Coast, Limited Partnership Limited Partnership Texas
Comprehensive Hand & Physical
Therapy, Limited Partnership Limited Partnership Texas
Gulfwinds Physical Therapy,
Limited Partnership Limited Partnership Texas
Safety Harbor Physical Therapy,
Limited Partnership Limited Partnership Texas
Hands Plus Therapy Center,
Limited Partnership Limited Partnership Texas
South Tulsa Physical Therapy,
Limited Partnership Limited Partnership Texas
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
Hands On Therapy, Limited
Partnership Limited Partnership Texas
U.S. PT Michigan #2, Limited
Partnership Limited Partnership Texas
Tupelo Hand Rehabilitation,
Limited Partnership Limited Partnership Texas
The Hale Hand Center,
Limited Partnership Limited Partnership Texas
Sooner Physical Therapy,
Limited Partnership Limited Partnership Texas
Arrow Physical Therapy, Limited
Partnership dba Broken Arrow
Physical Therapy Limited Partnership Texas
Achieve Physical Therapy,
Limited Partnership Limited Partnership Texas
Melbourne Physical Therapy
Specialists, Limited Partnership Limited Partnership Texas
Maine Physical Therapy,
Limited Partnership dba
Maine Physical Therapy Limited Partnership Texas
Brentwood Physical Therapy,
Limited Partnership (clinic
sold 12/31/01) Limited Partnership Texas
Saginaw Valley Sport and Spine,
Limited Partnership dba Saginaw
Valley Sport & Spine, Bay City
Sport & Spine and Midland Sport
& Spine Limited Partnership Texas
Brazos Valley Physical Therapy,
Limited Partnership Limited Partnership Texas
Plymouth Physical Therapy
Specialists, Limited
Partnership Limited Partnership Texas
Brick Hand & Rehabilitative
Services, Limited Partnership Limited Partnership Texas
Heartland Physical Therapy,
Limited Partnership Limited Partnership Texas
Bay View Physical Therapy, Ltd.
dba Pine State Physical Therapy Limited Partnership Texas
Rio Grande Physical Therapy,
Limited Partnership (closed
effective 07/27/2000) Limited Partnership Texas
Thomas Hand and Rehabilitation
Specialists, Limited
Partnership dba Thomas Physical
& Hand Therapy dba Thomas Hand
Institute Limited Partnership Texas
Excel Occupational and Physical
Therapy, Limited Partnership
(closed effective 01/31/2000) Limited Partnership Texas
Hand Health and Rehabilitation,
Limited Partnership Limited Partnership Texas
Flannery Physical Therapy,
Limited Partnership dba
Physical Therapy Plus Limited Partnership Texas
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
Port City Physical Therapy,
Limited Partnership Limited Partnership Texas
Proactive Physical Therapy,
Limited Partnership Limited Partnership Texas
All Brunswick Physical Therapy,
Limited Partnership Limited Partnership Texas
Penobscot Sports Associates,
Limited Partnership (clinic
closed 06/01/01) Limited Partnership Texas
Mooresville Management,
Limited Partnership Limited Partnership Texas
Beaufort Physical Therapy,
Limited Partnership Limited Partnership Texas
English Creek Hand & Therapy
Center, Limited Partnership Limited Partnership Texas
Brownwood Physical Therapy,
Limited Partnership dba
Pecan Valley Physical Therapy Limited Partnership Texas
Four Corners Physical Therapy,
Limited Partnership Limited Partnership Texas
Wilmington Hand Therapy, Limited
Partnership dba Hand Therapy
of Wilmington Limited Partnership Texas
High Point Physical Therapy,
Limited Partnership Limited Partnership Texas
Yarmouth Physical Therapy,
Limited Partnership Limited Partnership Texas
Quantum Physical Therapy, Limited
Partnership Limited Partnership Texas
Spine & Sport Physical Therapy,
Limited Partnership dba The Hand
Institute of Spine & Sport Limited Partnership Texas
Norman Physical Therapy,
Limited Partnership Limited Partnership Texas
Rice Rehabilitation Associates,
Limited Partnership Limited Partnership Texas
Physical Therapy and Spine
Institute, Limited Partnership Limited Partnership Texas
Forest City Physical Therapy,
Limited Partnership Limited Partnership Texas
Leader Physical Therapy,
Limited Partnership dba
Memphis Physical Therapy Limited Partnership Texas
Functions by Fletchall,
Limited Partnership Limited Partnership Texas
Coastal Physical Therapy,
Limited Partnership Limited Partnership Texas
Greene County Physical Therapy,
Limited Partnership (clinic
closed 02/2001) Limited Partnership Texas
Eastgate Physical Therapy,
Limited Partnership dba
Summit Physical Therapy Limited Partnership Texas
Tennessee Valley Physical
Therapy, Limited Partnership
(clinic closed 10/31/01) Limited Partnership Texas
Lucasville Therapy Services,
Limited Partnership Limited Partnership Texas
C.A.R.E. Physical Therapy
Center, Limited Partnership
(closed effective 03/31/99;
partnership canceled 04/15/99) Limited Partnership Texas
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
Ankeny Physical & Sports Therapy,
Limited Partnership Limited Partnership Texas
Twin Cities Physical Therapy,
Limited Partnership Limited Partnership Texas
Brem Physical Therapy Associates,
Limited Partnership (closed
effective 05/31/99) Limited Partnership Texas
Penn's Wood Physical Therapy,
Limited Partnership Limited Partnership Texas
Regional Physical Therapy
Center, Limited Partnership Limited Partnership Texas
Wyman Physical Therapy,
Limited Partnership dba
Precision Physical Therapy Limited Partnership Texas
Adams County Physical Therapy,
Limited Partnership Limited Partnership Texas
Coppell Spine & Sports Rehab,
Limited Partnership dba Physical
Therapy of Flower Mound,
dba Green Oaks Physical Therapy,
dba Southlake Physical Therapy,
dba Physical Therapy of Colleyville Limited Partnership Texas
Julie Emond Physical Therapy,
Limited Partnership dba
Maple Valley Physical Therapy Limited Partnership Texas
City of Lakes Physical Therapy,
Limited Partnership Limited Partnership Texas
Radtke Physical Therapy,
Limited Partnership Limited Partnership Texas
Hoeppner Physical Therapy,
Limited Partnership Limited Partnership Texas
Des Moines Physical Therapy,
Limited Partnership dba
Des Moines Physical Therapy Limited Partnership Texas
Shrewsbury Physical Therapy,
Limited Partnership Limited Partnership Texas
Heritage Physical Therapy,
Limited Partnership Limited Partnership Texas
Mansfield Physical Therapy,
Limited Partnership Limited Partnership Texas
Texstar Physical Therapy,
Limited Partnership Limited Partnership Texas
Peninsula Physical Therapy,
Limited Partnership Limited Partnership Texas
Lake Side Physical Therapy,
Limited Partnership dba
Lakeside Physical Therapy Limited Partnership Texas
Flint Physical Therapy,
Limited Partnership Limited Partnership Texas
Pelican State Physical Therapy,
Limited Partnership dba
Audubon Physical Therapy Limited Partnership Texas
Airpark Physical Therapy,
Limited Partnership dba
Philadelphia Physical Therapy Limited Partnership Texas
Capital Hand and Physical
Therapy, Limited Partnership Limited Partnership Texas
Maines & Dean Physical Therapy,
Limited Partnership Limited Partnership Texas
Edge Physical Therapy, Limited
Partnership dba River's Edge
Physical Therapy Limited Partnership Texas
Laurel Physical Therapy,
Limited Partnership dba
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
South Mississippi Physical Therapy Limited Partnership Texas
Riverwest Physical Therapy,
Limited Partnership Limited Partnership Texas
Scott Black Physical Therapy,
Limited Partnership dba
Northern Neck Physical Therapy Limited Partnership Texas
Mountain View Physical Therapy,
Limited Partnership Limited Partnership Texas
Intermountain Physical Therapy,
Limited Partnership Limited Partnership Texas
Staunton Hand & Rehab Services,
Limited Partnership Limited Partnership Texas
White Mountain Physical Therapy,
Limited Partnership Limited Partnership Texas
Battle Physical Therapy,
Limited Partnership Limited Partnership Texas
Covington Rehabilitation and
Hand Therapy, Limited Partnership
dba South Mississippi Physical
Therapy Limited Partnership Texas
Crawford Physical Therapy,
Limited Partnership Limited Partnership Texas
Mobile Spine and Rehabilitation,
Limited Partnership Limited Partnership Texas
University Physical Therapy,
Limited Partnership Limited Partnership Texas
Oregon Spine & Physical Therapy,
Limited Partnership Limited Partnership Texas
Audubon Physical Therapy,
Limited Partnership Limited Partnership Texas
Bow Physical Therapy & Spine
Center, Limited Partnership Limited Partnership Texas
Caldwell Management, Limited
Partnership Limited Partnership Texas
Southeast Boise Management,
Limited Partnership Limited Partnership Texas
North Shore Sports & Physical
Therapy, Limited Partnership Limited Partnership Texas
Performance and Sports Medicine,
L.P, dba Center for Performance
& Sports Medicine Excellence Limited Partnership Texas
Physical Therapy Connection of
McLean, Limited Partnership Limited Partnership Texas
Royal Physical Therapy,
Limited Partnership Limited Partnership Texas
Sport & Spine Clinic, L.P. Limited Partnership Texas
Yarmouth Physical Therapy,
Limited Partnership Limited Partnership Texas
Sport & Spine Clinic L.P. Limited Partnership Texas
Flannery Physical Therapy,
Limited Partnership, dba
Physical Therapy Plus Limited Partnership Texas
Cupertino Physical Therapy,
Limited Partnership, dba
Peak Physical Therapy Limited Partnership Texas
Town & Country Physical Therapy,
Limited Partnership Limited Partnership Texas
Mountain View Physical Therapy,
Limited Partnership Limited Partnership Texas
Aquatic and Orthopedic Rehab Specialists,
Limited Partnership, dba Oceanside
Physical Therapy Limited Partnership Texas
</Table>
<Table>
<Caption>
STATE OF
NAME OF TYPE OF INCORPORATION
SUBSIDIARY ENTITY OR FORMATION
- ---------- ------ ------------
Ashland Physical Therapy,
Limited Partnership Limited Partnership Texas
Lake Houston Physical Therapy,
Limited Partnership Limited Partnership Texas
R. Clair Physical Therapy,
Limited Partnership, dba R. Clair
Physical Therapy Limited Partnership Limited Partnership Texas
Town & Country Physical Therapy,
Limited Partnership Limited Partnership Texas
South Tulsa Physical Therapy, Limited
Partnership, dba Physical Therapy of Jenks Limited Partnership Texas
Coppell Spine & Sports Rehab, Limited
Partnership dba North Davis/Keller
Physical Therapy Limited Partnership Texas
Catamount Physical Therapy,
Limited Partnership Limited Partnership Texas
Green Oaks Physical Therapy, Limited
Partnership dba Green Oaks Physical Therapy Limited Partnership Texas
US PT Therapy Services Inc. dba
Mountain View Physical Therapy of Medford Corporation Texas
Peninsula Physical Therapy, Limited
Partnership dba Portland Physical Therapy
Specialists Limited Partnership Texas
Precise Touch Physical Therapy, Limited
Partnership dba Precise Touch Limited Partnership Texas
Lucasville Physical Therapy, Limited
Partnership dba Physical Therapy
of Wheelersburg Limited Partnership Texas
Custom Physical Therapy, Limited
Partnership Limited Partnership Texas
Workwise Therapy Services, Limited
Partnership Limited Partnership Texas
High Plains Physical Therapy,
Limited Partnership Limited Partnership Texas
Evergreen Physcial Therapy,
Limited Partnership Limited Partnership Texas
</Table>