PA Reimbursement: Medicare Parity, Incident-to Billing & Insurance Negotiation

1. The Medicare 85% Rate: What It Means in Practice

When a PA bills Medicare under their own National Provider Identifier, Medicare pays 85% of the Medicare Physician Fee Schedule rate for that service. This is a statutory rate set by Congress — not a payer policy that can be negotiated up individually.

The 15% gap is meaningful in volume. For a PA seeing 20 patients per day at an average Medicare allowed amount of $130 per visit, the 15% reduction equals approximately $390/day or $78,000/year in foregone revenue compared to a physician billing the same services.

The 85% rule applies to Medicare Part B services billed by the PA directly. Hospital inpatient and outpatient facility services have different rate structures — in some hospital settings, PA professional fees are bundled into facility billing and the 85% rule may not apply in the same way.

2. Incident-to Billing: How to Access 100% Reimbursement

Incident-to billing allows PA services to be billed under a supervising physician's NPI at the full 100% Medicare physician rate. It is the primary mechanism most employed PAs use to close the Medicare reimbursement gap — but it comes with strict compliance requirements that many practices misapply.

Incident-to billing is only available in traditional physician-supervised practice settings. PAs operating under OTP models, in rural health clinics (RHCs), or in federally qualified health centers (FQHCs) follow different billing rules — RHCs and FQHCs use an all-inclusive encounter rate rather than fee-for-service billing.

For independent PAs or those in solo practice, incident-to billing is generally not available — there is no supervising physician whose NPI to bill under. Independent PAs bill Medicare directly at 85%.

3. Commercial Payer Parity: Cigna, Aetna, UnitedHealth

Unlike Medicare, commercial payers are not bound by statute on APP reimbursement rates. This means PA reimbursement parity with physicians is a contract negotiation — and many commercial plans already reimburse PAs at full physician rates.

• Cigna: Generally reimburses PAs and NPs at 100% of physician fee schedule in most markets. Parity language is common in Cigna provider agreements. Verify in your specific contract — it varies by region and plan type.
• Aetna: Reimburses PAs at physician rates in most states. Some legacy plan types and Medicare Advantage products may have different terms. Review your participating provider agreement for PA-specific credentialing and reimbursement language.
• UnitedHealth/Optum: Rate parity varies significantly by state and network. UnitedHealth has no universal parity policy. Some network contracts include APP rate schedules that are different from physician schedules — request the full PA/NP fee schedule before signing.
• BCBS plans: Highly variable by state affiliate. Some Blue plans have adopted parity; others have not. Blue plans are independently operated — California Blue may differ significantly from Illinois Blue on PA reimbursement.
• Medicaid managed care: Commercial Medicaid managed care organizations (MCOs) have independent rate structures. Some states require Medicaid MCOs to reimburse PAs at physician parity; others do not. Check your state Medicaid office policy.

Practical action: Before credentialing with any commercial payer, request the PA-specific fee schedule in writing. Do not assume physician rate parity — confirm it as a contract term or negotiate it as a condition of participation.

4. Insurance Contract Negotiation for Independent PAs

PAs pursuing independent or semi-independent practice must credential and contract with payers as individual providers. This is a longer process than most anticipate — and the rates you lock in at initial credentialing often persist for years.

• Credentialing timeline: Commercial payer credentialing typically takes 60–120 days. Medicare credentialing via PECOS is faster (45–60 days on average) but requires a valid NPI, CAQH profile, and malpractice coverage documentation. Plan your practice launch timeline around credentialing delays.
• CAQH profile: The Council for Affordable Quality Healthcare (CAQH) ProView profile is the universal credentialing database most commercial payers use. Maintaining a complete, up-to-date CAQH profile reduces credentialing time significantly. Re-attest every 120 days to avoid expiration.
• Fee schedule negotiation: Many PAs accept payer fee schedules without negotiation. Initial rates are rarely the best available. For practices with a specialty focus or geographic need, payers may negotiate rates upward — especially in underserved markets.
• In-network vs. out-of-network: For specialty services (aesthetics, weight management, behavioral health in some markets), remaining out-of-network and collecting directly from patients may yield higher effective rates than network contracts. Model both before deciding.
• Group vs. individual enrollment: If practicing under a group NPI, your services may be billed under the group rather than your individual NPI. This affects how your name appears in insurance directories — which matters for patient acquisition.

5. Cash-Pay and Hybrid Models: When Insurance Is Not the Right Fit

Some PA practice models generate more revenue and less administrative burden outside the insurance system. Cash-pay and hybrid models are increasingly viable for specialty-focused PAs.

• Aesthetics and med spa: The highest-margin PA practices often accept no insurance. Botox, dermal fillers, laser treatments, and body contouring are cash-pay by default — and margins are substantially higher than primary care insurance billing. Initial setup costs (equipment, supplies, training) are significant but amortize quickly in established practices.
• Direct primary care (DPC): Monthly membership model (typically $50–150/patient/month) covering unlimited primary care visits. PAs run successful DPC practices in OTP states. Revenue is predictable; billing overhead drops to near zero; patient panel sizes are smaller but relationships are deeper.
• Occupational and corporate health:Contracted services to employers bill the employer directly, not insurance. Workers' compensation is billed to the employer's carrier, not patient insurance. Eliminates patient billing complexity; requires employer contract management instead.
• Telehealth subscription: Subscription telehealth for specific conditions (weight management, hair loss, ED, skincare) can operate cash-pay with monthly or per-visit fees. Regulatory landscape for controlled substances via telehealth remains in flux — confirm your state and DEA rules before building subscription models around controlled medications.
• Hybrid model: Accept a limited panel of commercial insurance for primary care visits while offering cash-pay ancillary services (aesthetics, weight management, nutraceuticals). Requires careful billing separation to avoid payer contract violations.

Your website pricing page matters more in a cash-pay model than in an insurance-based practice. Transparent pricing builds patient trust and reduces phone volume. State your rates directly — patients who search for PA-led cash practices are specifically looking for that clarity.

6. Billing Structure Decisions: NPI, Group vs. Individual

How you enroll with Medicare and commercial payers affects both your reimbursement rates and your visibility in insurance directories. These decisions are worth thinking through before you credential — changing them later creates re-credentialing work.

PA billing is one area where an experienced healthcare billing consultant or medical billing attorney pays for themselves quickly. A one-time consultation before your first credentialing application is worth more than a year of billing corrections.

Your website should clearly state whether you accept insurance, which specific plans you participate in, and your self-pay rate. Ambiguity on billing drives patients to call instead of book — adding friction to the conversion you paid to create.