Stark Law
The Stark Law, formally the physician self-referral law, is a federal civil statute that prohibits a physician from referring Medicare patients for designated health services, a category that includes home health, to an entity with which the physician or an immediate family member has a financial relationship, unless a specific exception applies. It is a strict liability law: intent does not matter, and a technically noncompliant arrangement is a violation. This page is educational and general, not legal advice.
How the prohibition works
Stark analysis asks three questions. Is there a referral by a physician for a designated health service payable by Medicare? Home health services are on the list. Does the physician, or an immediate family member, have a financial relationship with the entity, meaning an ownership or investment interest or any compensation arrangement in either direction? If so, does the arrangement fit squarely within a regulatory exception? If no exception fits, the referral is prohibited and the entity may not bill Medicare for the service. Because liability is strict, a missing signature or an expired agreement can create exposure without any bad intent.
Key exceptions for home health
The exceptions agencies rely on most are bona fide employment, personal service arrangements, and fair market value compensation, plus rental exceptions for space and equipment. They share common structural requirements: the arrangement is in writing and signed, compensation is set in advance, consistent with fair market value, not determined in a way that reflects the volume or value of the physician's referrals, and the arrangement is commercially reasonable. Medical director agreements are the everyday example: real duties, documented time, benchmarked compensation, current signatures.
Home health exposure points
The exposure map for agencies is fairly short but serious. Physician or physician-family ownership in an agency the physician refers to rarely fits any exception, which is why physician-owned home health agencies are largely off the table. Compensation arrangements are the more common issue: medical director contracts that lapsed but payments continued, above-market fees, leasing office space from a referring physician at friendly rates, or paying referring physicians for vaguely defined consulting. Each of these is also an Anti-Kickback Statute question, and both analyses should run together.
Penalties and self-disclosure
Consequences include denial of payment for prohibited referrals, mandatory refunds of amounts collected, civil monetary penalties for knowing violations, potential exclusion, and False Claims Act exposure when noncompliant claims were submitted knowingly. CMS operates the Self-Referral Disclosure Protocol (SRDP), which lets providers self-report actual or potential Stark violations and often resolve them for reduced amounts. The practical takeaway for operators is unglamorous: keep an inventory of every physician financial relationship, calendar the expiration dates, and never let payments run ahead of paperwork.
Frequently asked questions
How is Stark different from the Anti-Kickback Statute?
Stark is civil and strict liability, applies only to physician referrals for designated health services, and cares about the structure of the financial relationship rather than intent. The AKS is criminal, intent-based, and covers any referral source and any item or service payable by a federal health care program.
Can a physician refer patients to a home health agency their spouse partly owns?
Financial relationships held by immediate family members count under Stark, so those referrals are prohibited unless an exception applies, and ownership in a home health agency rarely fits one. Situations like this need analysis by healthcare counsel before any referrals occur.
Does Stark apply to Medicaid and Medicare Advantage patients?
The statute is written around Medicare fee-for-service referrals, and its application beyond that is more complicated and contested. Many states also have their own self-referral laws with different scopes, so multi-payer arrangements deserve a state-specific review.