UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

(MARK ONE)

FOR THE QUARTERLY PERIOD ENDED June 30, 2012

OR

FOR THE TRANSITION PERIOD FROM         TO        

COMMISSION FILE NUMBER 1-11151

U.S. PHYSICAL THERAPY, INC.

(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE: (713) 297-7000

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.    x  Yes    ¨  No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    x  Yes    ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    ¨  Yes    x  No

As of August 9, 2012, the number of shares outstanding (issued less treasury stock) of the registrant’s common stock, par value $.01 per share, was: 11,800,229.

Explanatory Note

The sole purpose of this Amendment No. 1 (this “Amendment”) to U. S. Physical Therapy, Inc.’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2012, filed with the Securities and Exchange Commission on August 9, 2012 (the “Form 10-Q”), is to furnish Exhibit 101, which provides the XBRL (eXtensible Business Reporting Language) Interactive Data Files for the financial statements and notes included in Part I, Item 1 of the Form 10-Q.

No other modifications or changes have been made to the Form 10-Q. This Amendment speaks as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date and does not modify or update in any way disclosures made in the original Form 10-Q.

Pursuant to Rule 406T of the Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 and 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and otherwise are not subject to the liability under those sections.

PART II - OTHER INFORMATION

ITEM 6. EXHIBITS.

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SIGNATURES

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

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INDEX OF EXHIBITS

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