EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of U.S. Physical Therapy, Inc. (the “registrant”) on Form 10-K for the year ending December 31, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “report”), we, Christopher J. Reading, and Carey Hendrickson, Chief Executive Officer and Chief Financial Officer respectively, of the registrant, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to our knowledge:

(1) The report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

February 29, 2024

/s/ Christopher J. Reading

Christopher J. Reading

Principal Executive Officer

/s/ Carey Hendrickson

Carey Hendrickson

Principal Financial and Accounting Officer

A signed original of this written statement required by Section 906 has been provided to U. S. Physical Therapy, Inc. and will be retained by U. S. Physical Therapy, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.