The AKS exposure of a concierge or cash-based practice depends heavily on its specific structure and business relationships. The analysis differs materially across three broad categories of practice.
A. Pure Cash / DPC Practice — No Federal Program Participation
A physician who has never enrolled in Medicare, never participated in Medicaid, and submits no claims to any federal health care program presents the lowest direct AKS exposure profile. The absence of a federal billing nexus is a genuine — and significant — insulating factor for the physician’s direct patient care services. But it is emphatically not a blanket immunity from the statute, and the following categories of ancillary business relationships each carry their own AKS risk analysis.
Laboratory Referral Relationships and the Concierge Medical Practice
Laboratory referral relationships represent perhaps the most common and underappreciated AKS risk for pure cash practices. When a DPC physician refers patients — including patients who are Medicare beneficiaries, even if the physician doesn’t bill Medicare — to an outside reference laboratory, and that laboratory bills Medicare for the testing, the referral is squarely within the AKS’s scope. If any remuneration flows from the lab to the practice — free specimen processing equipment, subsidized point-of-care interfaces, below-market test pricing, or “medical director” stipends without genuine corresponding duties — that arrangement must satisfy an applicable safe harbor or faces AKS scrutiny. OIG has brought numerous enforcement actions in exactly this pattern, and it remains a sustained enforcement priority.
Compounding Pharmacy Relationships and the Concierge Medical Practice
Compounding pharmacy relationships carry similar risk and have generated some of the most aggressive OIG enforcement activity of the past decade. Compounding pharmacies routinely bill federal health care programs, including TRICARE, for compounded preparations. A cash-based practice whose physicians receive consulting fees, practice sponsorships, free patient care supplies, or favorable prescription pricing from a compounding pharmacy — in exchange for directing prescriptions to that pharmacy — faces direct AKS exposure even though the practice itself does not bill federally. The pharmacy’s billing to TRICARE or other federal programs provides the necessary nexus.
Employer and Group Contracting Arrangements and the Concierge Medical Practice
Employer and group contracting arrangements require a careful threshold analysis. An employer direct contracting arrangement that covers only actively employed workers under a commercial group health plan generally lacks the federal program nexus. But retirement-eligible employees whose benefit plans coordinate with Medicare, federal contractors whose employees are covered under federal programs, or arrangements where Medicare Advantage plans are included in the employer benefit package can all supply the nexus that brings the arrangement within AKS reach.
MSO Arrangements and the Concierge Medical Practice
MSO arrangements deserve particular scrutiny. Many DPC practices operate under or alongside an MSO structure — for billing support, staffing, real estate, or administrative services. If the MSO, its investors, or affiliated entities have any federal health care program participation, the financial relationships within the MSO structure must be independently analyzed under the AKS. Investor-physicians who also refer patients to MSO-affiliated services create exactly the kind of mixed-motivation arrangement that the AKS was designed to address.
Ancillary Referral Streams and the Concierge Medical Practice
Ancillary referral streams to federally reimbursed services — physical therapy, diagnostic imaging, durable medical equipment suppliers, or specialist physicians who bill Medicare — create AKS exposure for any remuneration that flows from those providers back to the referring cash practice. Shared space arrangements at below-market rates, co-marketing agreements, and patient referral reciprocity arrangements all require analysis.
B. Hybrid Concierge Practice — Maintained Insurance Participation
The hybrid concierge model — in which a physician continues to accept Medicare assignment and bill for covered services while also charging a separate membership retainer for enhanced access and non-covered services — represents the highest-risk structural category under the AKS. The physician is voluntarily maintaining a direct billing nexus to a federal health care program, which means every financial arrangement touching the practice must be evaluated with full AKS rigor.
Retained Fee Design and the Hybrid Cash-Based Practice
The central compliance challenge in the hybrid model is the retainer fee design. CMS addressed this directly in its 2014 guidance, confirming that a membership or retainer fee is permissible only if: (1) the enhanced services covered by the retainer — such as 24/7 telephone access, same-day appointments, extended visit times, and secure electronic communications — are services not otherwise covered by Medicare; and (2) the retainer does not, directly or indirectly, include any Medicare-covered service. The moment a retainer begins to overlap with services for which the practice is also billing Medicare, the retainer itself risks characterization as remuneration connected to federally reimbursed services.
Double-billing risk is the most immediate consequence of retainer design failures. If a patient pays a membership fee for “enhanced access” that includes priority scheduling and extended consultations, and the physician subsequently bills Medicare for an office visit that the patient accessed through that priority scheduling, the question of whether the retainer and the Medicare-billed visit are truly for distinct services becomes critical. OIG and the Department of Justice have pursued enforcement actions premised on exactly this overlap theory.
Marketing arrangements present another risk vector for hybrid practices. Arrangements with employers, health systems, or insurance brokers — in which the hybrid practice receives compensation for marketing its membership program to covered populations — must be reviewed to ensure that no part of the compensation could be characterized as remuneration tied to the referral of Medicare-covered services.
Beneficiary Inducement Risks and the Hybrid Cash-Based Practice
Beneficiary inducement risk arises when hybrid practices offer complimentary or reduced-cost membership to Medicare patients — whether to maintain existing relationships, attract new patients, or facilitate care coordination. The Civil Monetary Penalties Law at 42 U.S.C. § 1320a-7a(a)(5) prohibits offering remuneration to a Medicare beneficiary that the offeror knows or should know is likely to influence the beneficiary to select a particular provider. A waiver of the retainer fee for Medicare patients, without a documented financial hardship assessment or consistently applied waiver policy, can be characterized as precisely this type of inducement.
C. Medicare Opt-Out Practice
A physician who has properly opted out of Medicare under 42 C.F.R. §§ 405.410–405.455 occupies a distinct regulatory position. The opt-out removes the physician from Medicare’s billing requirements and permits the execution of private contracts with Medicare beneficiary patients under which neither the physician nor the patient may submit claims to Medicare for covered services. For the direct patient care relationship, this meaningfully reduces — though does not eliminate — AKS exposure.
However, the opt-out does not quarantine the practice from AKS scrutiny in its ancillary relationships. The same analysis applicable to pure cash practices governs referrals to laboratories, pharmacies, imaging centers, DME suppliers, and specialist physicians who bill Medicare. The opt-out physician who refers patients to a reference laboratory that bills Medicare for the testing ordered, and who receives equipment, services, or payments from that laboratory in connection with the referral relationship, remains fully within the AKS’s reach for that referral stream. Opt-out status is a status that applies to the physician’s own billing — it is not a regulatory force field that surrounds the entire practice.
The opt-out physician who refers patients to a reference laboratory that bills Medicare for the testing ordered, and who receives equipment, services, or payments from that laboratory in connection with the referral relationship, remains fully within the AKS’s reach for that referral stream.
John Fisher | WisconsinHealthLawyer.com
Read the Next Chapter in the AKS and Concierge & Cash-Based Practice
