3.2 Anti-Kickback Statute (AKS) & Stark Law
Key Takeaways
- The Anti-Kickback Statute is a criminal, intent-based law that bars knowingly offering, paying, soliciting, or receiving anything of value to induce federal health care program referrals.
- Stark Law is a civil, strict-liability statute that prohibits physician self-referral of designated health services to entities the physician (or an immediate family member) has a financial relationship with.
- AKS covers any payer-related referral source and any item or service; Stark applies specifically to physicians and a defined list of designated health services.
- AKS has voluntary safe harbors and Stark has mandatory exceptions — an arrangement must fit squarely within them to be protected.
- Both statutes carry civil monetary penalties, and AKS violations can also bring criminal fines, imprisonment, and exclusion from federal programs.
Two Laws, One Goal
The Anti-Kickback Statute (AKS) and the Physician Self-Referral Law (Stark Law) both target the danger that money — not medical need — drives referrals. The CPB exam frequently presents a scenario and asks which law applies, so the differences matter more than the overlap.
Anti-Kickback Statute (AKS)
The AKS is a criminal statute. It prohibits knowingly and willfully offering, paying, soliciting, or receiving remuneration (anything of value) to induce or reward referrals of items or services payable by a federal health care program.
Key points:
- Intent-based — the government must show the parties acted knowingly and willfully.
- Broad reach — it applies to any referral source, not just physicians, and to any item or service.
- Both sides liable — the party offering and the party receiving remuneration can be charged.
- Safe harbors — regulations describe voluntary safe harbors (such as certain space and equipment leases, employment, and personal services arrangements). An arrangement that meets every element of a safe harbor is protected; one that does not is simply evaluated on its facts.
- A claim that results from an AKS violation is also a false claim under the FCA.
Stark Law (Physician Self-Referral)
Stark is a civil, strict-liability statute. It prohibits a physician from referring a Medicare patient for a designated health service (DHS) to an entity with which the physician — or an immediate family member — has a financial relationship, unless an exception applies.
Key points:
- Strict liability — intent is irrelevant. If a referral violates Stark and no exception applies, the violation exists.
- Designated health services include lab tests, imaging, physical therapy, durable medical equipment, home health, and outpatient prescription drugs, among others.
- Exceptions are mandatory — an arrangement must fit fully within a Stark exception (such as bona fide employment or in-office ancillary services) to be lawful.
- A claim for a service furnished under a prohibited referral may not be billed or paid.
AKS vs. Stark Side-by-Side
| Feature | Anti-Kickback Statute (AKS) | Stark Law |
|---|---|---|
| Type of law | Criminal (and civil) | Civil only |
| Intent required | Yes — knowing and willful | No — strict liability |
| Who is regulated | Anyone (any referral source) | Physicians (and immediate family) |
| Scope of services | Any item or service | Designated health services (DHS) |
| Payers covered | Federal health care programs | Medicare (and Medicaid via related rules) |
| Protective mechanism | Voluntary safe harbors | Mandatory exceptions |
| Penalties | Criminal fines, imprisonment, exclusion, CMPs | Denial of payment, refunds, CMPs, exclusion |
Civil Monetary Penalties for Kickbacks
Beyond criminal exposure, the government may impose civil monetary penalties (CMPs) for kickback conduct, plus assessments based on the amount of the improper remuneration, and may exclude violators from Medicare and Medicaid. Because CMP amounts are inflation-adjusted, exam answers should describe the type of penalty rather than a fixed dollar figure.
An imaging center pays a primary-care physician a per-patient "marketing fee" every time the physician sends a Medicare patient for an MRI. Which law most directly and completely captures this arrangement?
A physician owns part of a physical therapy clinic and refers her own Medicare patients there. The arrangement does not fit any Stark exception. There is no evidence of bad intent. What is the consequence?