UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): August 14, 2013 (August 8, 2013)

IASIS HEALTHCARE LLC

(Exact Name of Registrant as Specified in Charter)

(615) 844-2747

(Registrant’s telephone number, including area code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Item 1.01 Entry into a Material Definitive Agreement.

On August 8, 2013, affiliates of IASIS Healthcare LLC (“IASIS”) entered into a Purchase Agreement (the “Agreement”) with Medical Properties Trust, Inc. (“MPT”). Pursuant to the Agreement, IASIS will sell the real estate of the following medical facilities (the “Facilities”) to MTP and will thereafter lease the land and the buildings associated with the Facilities from MPT (the “Sale Leaseback Transaction”):

The aggregate amount of sale proceeds is expected to be $281.3 million. The related lease agreements have initial terms of 15 years with various renewal options that can be exercised at the applicable Facility’s election. The Agreement also provides IASIS with a right of first refusal option pursuant to which IASIS can repurchase the land and buildings associated with the Facilities should MPT subsequently decide to sell them. Additionally, MPT agreed to reduce the lease rate for the IASIS affiliate that leases Pioneer Valley Hospital in West Valley City, Utah from MPT, and to fund approximately $2.0 million in property improvements at that site.

The Agreement contains customary closing approvals and other conditions and is not subject to any financing contingencies. MPT is not affiliated with IASIS or its affiliates, and the sale of the Facilities results from arm’s-length negotiations between IASIS and MPT. The Sale Leaseback Transaction of the Facilities is expected to close prior to September 30, 2013.

IASIS plans to use the proceeds of the Sale Leaseback Transaction to implement strategic initiatives aimed at, among other things, growth in existing IASIS markets and expansion into new markets.

Item 7.01 Regulation FD Disclosure

IASIS issued a press release regarding the Sale Leaseback Transaction, which such press release is furnished herewith as Exhibit 99.1. Such press release contains certain “forward looking statements” that are inherently subject to risks, including those discussed in the “Risk Factors” section of IASIS’ Annual Report on Form 10-K for the fiscal year ended September 30, 2012.

Item 9.01. Financial Statements and Exhibits.

Safe Harbor Statement

Some of the statements IASIS makes in this Current Report on Form 8-K are forward-looking within the meaning of the federal securities laws, which such statements are intended to be covered by the safe harbors created thereby. Those forward-looking statements include all statements that are not historical statements of fact and those regarding IASIS’ intent, belief or expectations, including, but not limited to, future financial and operating results, IASIS’ plans, objectives and other statements that are not historical facts. Forward-looking statements involve known and unknown risks and uncertainties that may cause actual results in future periods to differ materially from those anticipated in the forward-looking statements. These risk factors and uncertainties are more fully described in IASIS’ Annual Report on Form 10-K for the fiscal year ended September 30, 2012, and other filings with the Securities and Exchange Commission.

Although IASIS believes that the assumptions underlying the forward-looking statements contained in this Current Report on Form 8-K are reasonable, any of these assumptions could prove to be inaccurate, and, therefore, there can be no assurance that the forward-looking statements included in this Current Report on Form 8-K will prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements included herein, a reader should not regard the inclusion of such information as a representation by IASIS or any other person that IASIS’ objectives and plans will be achieved. IASIS undertakes no obligation to publicly release any revisions to any forward-looking statements contained herein to reflect events and circumstances occurring after the date hereof or to reflect the occurrence of unanticipated events.

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 hereunto duly authorized.

EXHIBIT INDEX