The Stark Law, also known as the Physician Self‑Referral Law, prohibits physicians from referring Medicare patients for designated health services (DHS) to entities with which they or their immediate family members have a financial relationship, unless an exception applies. Stark is a strict liability statute, meaning intent does not matter. A violation occurs even if accidental.
Because most medical practices must rely on one or more exceptions to function, understanding the main exceptions, and why they fail is essential to staying compliant.
1. In‑Office Ancillary Services (IOAS) Exception
This is one of the most widely used exceptions in group medical practices. It allows physicians to refer Medicare patients for DHS (such as imaging, labs, therapy) within their own practice, so long as several structural and operational conditions are met.
Key Requirements
- Group Practice Structure: The referring physician must be part of a qualifying “group practice.”
- Location Requirements: DHS must be provided either in the same building where the group furnishes non‑DHS physician services, or in a centralized building used for group diagnostic or clinical services.
- Supervision Requirements: Services must be furnished under appropriate physician supervision.
- Billing Requirements: The practice must be the one submitting the bill.
Why Practices Lose Protection
- Failing to meet the “same building” or “centralized building” tests. Even small location misalignments can disqualify the exception.
- Non‑qualifying group practice arrangements. If compensation distribution, governance, or physician employment terms do not meet the definition of a “group practice,” the entire exception collapses.
- Insufficient supervision (e.g., remote supervision when in‑person is required).
Because Stark is strict liability, any technical failure, even inadvertent, makes all related referrals non‑compliant.
2. Personal Service Arrangements Exception
This exception permits physicians to be paid for bona fide services under a written, signed, fair‑market‑value agreement that does not vary with volume or value of referrals.
Key Requirements
- Written agreement signed by both parties.
- Fair market value (FMV) compensation, not tied to referrals.
- Commercially reasonable arrangement.
- Clearly defined, necessary services actually performed.
Why Practices Lose Protection
- Missing or unsigned agreements. Even a single missing signature or expired contract can undo protection.
- Compensation not at FMV or adjusted in ways that correlate with referrals.
- Failure to document actual services performed or failure to maintain updated agreements.
These “paperwork failures” are among the most common Stark violations because CMS and OIG treat them as per se violations.
3. Fair Market Value (FMV) Compensation Exception
FMV exceptions protect arrangements where compensation reflects market rates and does not depend on referrals.
Key Requirements
- Compensation must be FMV.
- Set in advance and not tied to volume/value of referrals.
- Arrangement must be commercially reasonable even without referrals.
Why Practices Lose Protection
- Over‑ or under‑payment of employed or contracted physicians.
- Incentive structures that inadvertently track referral volume (e.g., per‑click payments tied to DHS volume).
- Failure to re‑evaluate FMV when circumstances change (location, specialty demand, productivity).
4. Group Practice Compensation Methods Exception
Group practices may compensate member physicians using productivity and profit‑sharing methods as long as the formulas do not tie compensation to the volume or value of that physician’s own DHS referrals.
Key Requirements
- Profit shares or productivity bonuses must be derived from aggregate practice‑wide metrics, not individual DHS referrals.
- Group practice must meet the statutory definition (size, governance, integration, etc.).
Why Practices Lose Protection
- Improper allocation of DHS profits (e.g., giving DHS profits back to the physician who generated them).
- Using RVUs or productivity measures that indirectly track DHS referrals, which CMS may treat as prohibited volume/value correlation.
- Group practice definition failures (ownership or decision‑making structures inconsistent with Stark’s requirements).
5. Professional Courtesy Exception
Some practices extend courtesy discounts or free services. Stark allows this only under strict conditions.
Key Requirements
- Courtesy must be available to all staff or community members, not tied to referrals.
- Must be in writing, approved in advance by the governing body.
- Cannot be extended to federal program beneficiaries unless based on demonstrated financial need.
- Cannot violate the Anti‑Kickback Statute.
Why Practices Lose Protection
- Selective courtesy offered to referral sources.
- Lack of a written policy or failure to apply the policy uniformly.
- Extending courtesy to Medicarebeneficiaries without financial‑need documentation.
Why Exceptions Fail: Common Themes
Across all exceptions, practices lose protection when they fail to satisfy every required element:
1. Technical noncompliance
- Missing signatures
- Expired agreements
- Incorrect corporate structure
- Using the wrong location or supervision level
These errors often lead to violations even when the financial relationship is benign.
2. Linking compensation (directly or indirectly) to referrals
This is one of the fastest ways to invalidate nearly any exception.
3. Poor documentation and outdated arrangements
Failure to update agreements after changes in roles, compensation, or services is a major source of Stark violations.
4. Not understanding strict liability
Even accidental noncompliance triggers:
- Denial and refund of claims
- Civil monetary penalties
- Exclusion from Medicare
- Potential False Claims Act liability
Conclusion
Most medical practices rely heavily on Stark exceptions to function legally, especially IOAS, personal service agreements, and FMV‑based compensation structures. These exceptions are powerful, but highly technical, and protection evaporates instantly when even one requirement is unmet.
A well‑designed compliance program, backed by updated contracts, documented FMV analyses, and routine audits, remains the best way to ensure that your practice continues to benefit from these exceptions without risking penalties.
