Horizon Medical Center of Denton: PN Modifier Omissions and Physician-Affiliated Contracts

Horizon Medical Center of Denton paid $14.2 million in a PN modifier settlement that also covered alleged physician self-referral violations. For an outpatient billing or facility-management insider, the case turns on familiar details: how a surgery center appeared on a Medicare claim, and who stood behind the companies managing the facility or leasing its equipment. Horizon disclosed problems involving both the claims and the physician relationships. The alleged false claims put Medicare’s money at stake.

Corinth Investor Holdings, L.L.C. owns Horizon, which operates a long-term acute care hospital and outpatient surgery centers in Dallas County. The settlement covered four surgery centers. The hospital reported the conduct to the Department of Justice itself. The U.S. Attorney’s Office for the Northern District of Texas announced the resolution on November 4, 2024, saying the hospital had already paid.

Why the PN Modifier Matters to Medicare Payment

The PN modifier identifies services at non-excepted off-campus outpatient facilities. Horizon disclosed that its Medicare claims omitted that modifier and the service location for facilities in Dallas, Richardson and Coppell. The government alleged that the omissions made those Medicare claims false.

This is a hospital billing fraud issue in which the facility’s status matters to the payment. As a federal court explained in 2020, off-campus hospital departments had received up to twice the Medicare reimbursement per patient as independent physician practices for the same service.

Hospitals responded to that difference by buying physician practices and converting them into hospital departments, often with little change to the facility or the patients served. The care could stay much the same while its payment category changed.

Congress changed the treatment of newer off-campus departments through the Bipartisan Budget Act of 2015. It preserved an exception for departments already billing for covered outpatient services before November 2, 2015, while moving newer departments outside the hospital outpatient payment system.

For Horizon, the omitted fields were how the claim identified the non-excepted facility. The financial consequence mattered enough that the hospital supplied an independent expert’s analysis of the PN omission’s impact.

A similar facility-status issue appeared in the William Beaumont Hospital kickback settlement. Alongside allegations about physician compensation, the government alleged that Beaumont misrepresented a CT radiology center as a qualifying hospital outpatient department. That comparison matters because it puts a separate question beside the physician deals: what did the hospital tell the government about the place providing the service?

The Physician Relationships Behind the Contracts

Horizon also disclosed management and equipment arrangements that connected the hospital to physicians performing procedures at its outpatient facilities.

Under Hospital Department Management Agreements, Horizon contracted with outside management companies at each facility. Those companies were affiliated with physicians who performed surgery there. The management relationship therefore reached beyond the hospital and its contractor to the doctors working at the surgery centers.

Under Operating Lease Agreements, Horizon leased equipment from companies owned directly or indirectly by a physician performing procedures at the centers. The physician connection could sit behind the equipment supplier’s company name. Someone familiar with the ownership could see a relationship that the lease’s title alone would not explain.

Those arrangements created financial relationships between Horizon and the physician-owners. They were the physician-contract side of the hospital’s disclosure under the Stark Law, the physician self-referral law. The central connection is between the physician’s financial interest, the patients referred and the hospital’s Medicare claims.

For an insider working on physician compensation and referral arrangements, the useful detail is how the agreement worked: who supplied the management services or equipment, who held the financial interest, and what the hospital paid for.

What Horizon’s Self-Disclosure Included

Horizon received credit for its voluntary self-disclosure and cooperation with investigators. The U.S. Attorney’s Office said the conduct was unknown to the government when the hospital reported it. The disclosure identified the transactions, the people involved and the potential financial effect on the government.

A 2009 study, Medicare Billing Risk Perceptions of Hospitals Operating Under Corporate Integrity Agreements, in the Journal of Forensic & Investigative Accounting, compared survey responses from hospitals under government compliance agreements with those relying on voluntary compliance programs. The former group rated all eight billing schemes studied as riskier, with statistically significant differences for six. For an insider, that makes the internal response worth explaining alongside the claims: what management understood about the billing and how it responded.

The Agreement, the Payment and the Work

The documents that explain a physician arrangement include what the contract promised, what the hospital paid and what work actually happened. A separate case involving New York-Presbyterian Hudson Valley Hospital shows why those details matter. The government’s complaint, published with the settlement announcement, alleged that payments to an oncology practice continued even after the agreements stopped operating, and that the hospital also paid for agreed services the practice had not performed or documented.

In that settlement, the hospital admitted paying the practice more than $4 million for work that was unperformed, departed from the agreements or lacked time records. The gap between the agreement and the work was concrete enough for the hospital to acknowledge it.

For someone who knows an outpatient facility, the Horizon and Hudson Valley matters point to different pieces of the business. Health care billing staff may understand the location and modifier attached to a claim. Contract and finance staff may understand the physician ownership, the payments and the services behind an agreement. Their account can connect what the hospital billed with decisions made inside it.

An insider with evidence of false claims can bring a qui tam case. A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers.

You Know What the Claim Leaves Out

If you know who chose the billing fields or what stood behind a physician-linked management or equipment agreement, talk with our whistleblower experts about those decisions. We connect your account to the claims and contracts to build your strongest healthcare whistleblower case, and bring in whistleblower lawyers who know outpatient billing and physician arrangements. We stay with you from that first assessment through the case’s resolution.