The Stark Law: What the Physician Self-Referral Ban Prohibits

The Stark Law, the federal physician self-referral prohibition at 42 U.S.C. Section 1395nn, bars a physician from referring a patient to an entity for certain Medicare-covered services whenever the physician, or an immediate family member, holds a financial relationship with that entity. The same provision bars the entity from billing Medicare for that service. Liability attaches without regard to the physician's intent. An unexamined ownership stake or compensation arrangement can put payment on an entire course of care at risk.

The Referring Physician and Family Attribution

A referral under the statute is a physician's request for, order for, or certification of the need for a designated health service, including a request for a consultation and any test or procedure the consulting physician orders, and a plan of care a physician establishes that calls for one. The prohibition also reaches a referral tied to a financial relationship held by the physician's immediate family member rather than the physician alone. Immediate family is defined broadly: spouse, parent, child, sibling, in-law, grandparent, and grandchild. A spouse's ownership stake in an imaging center reaches the referring physician the same as the physician's own stake would.

Designated Health Services

The prohibition reaches only referrals for services Congress designated by name. Categories include clinical laboratory services, physical and occupational therapy, outpatient speech-language pathology, radiology and imaging, radiation therapy, durable medical equipment and supplies, prosthetics and orthotics, home health services, outpatient prescription drugs, and inpatient and outpatient hospital services. CMS revises the procedure codes every year; check CMS's current designated health services code list before concluding a test or supply falls outside the prohibition.

Financial Relationships and the Referral Bar

Two kinds of financial relationship trigger the prohibition: an ownership or investment interest in the entity furnishing the service, or a compensation arrangement, direct or indirect, so long as the remuneration still reaches the physician or an immediate family member. Either relationship is enough on its own.

The Stark Law does not ask whether the physician intended to profit from the referral. A qualifying financial relationship triggers the prohibition on its own; good faith is not a defense.

Once a qualifying relationship exists and no exception applies, the statute bars both ends of the transaction. The physician may not make the referral, and the entity may not present, or cause to be presented, a Medicare claim or a bill to any payer for the service furnished under that referral.

What Follows a Violation

A violation carries consequences that are mechanical rather than discretionary. Medicare will not pay for a designated health service furnished under a prohibited referral, and a person who already collected payment must refund it. Where the conduct was knowing, the statute adds civil penalties on top of the refund obligation; check current figures at the primary source, since amounts are adjusted over time.

A Stark violation can also feed False Claims Act exposure once a provider keeps Medicare payments after learning of the problem. See Stark Law Violations Feeding False Claims Liability for how that exposure builds. The same arrangement a Stark review uncovers can also draw a civil investigative demand or a grand jury subpoena once the government opens its own inquiry.

State law may separately restrict physician self-referral on top of the federal prohibition; check the specific state's law at its own source. The statute pairs the prohibition with exceptions for arrangements physician practices rely on every day, so a qualifying relationship can still fall outside the bar when one applies; see Stark Law Exceptions Physician Practices Rely On. The Stark Law operates independent of the federal Anti-Kickback Statute; see Stark Law vs the Anti-Kickback Statute: The Differences That Matter.

A practice that finds a problem arrangement in place can bring it to CMS through the Self-Referral Disclosure Protocol, letting a provider disclose the issue and seek a reduced repayment amount instead of waiting for an audit to find it first. See The CMS Self-Referral Disclosure Protocol for Stark Violations for how that process runs.

Why Early Legal Counsel Is Critical

It is critical that physician practices promptly retain experienced healthcare defense counsel upon discovering a referral pattern or compensation arrangement that may implicate the Stark Law. Early legal intervention can confirm which designated health services and financial relationships are in play, test the arrangement against the available exceptions, and shape any disclosure before the government frames the issue first. Delaying legal representation can significantly affect the outcome and expose the practice to unnecessary risk.

How Health Law Alliance Can Help

Health Law Alliance has represented 2,500+ clients nationwide. The firm's regulatory defense attorneys apply Stark Law alongside the Anti-Kickback Statute and Medicare's conditions of participation when a referral pattern or compensation arrangement needs testing against the exceptions. If your practice has identified a referral pattern that may not fit an exception, contact Health Law Alliance's healthcare fraud defense attorneys for a free, confidential consultation before the arrangement becomes a claim the government is examining.