Physician Assistant Billing Experts

Physician Assistant Medical Billing Services

Physician assistant billing follows rules similar to nurse practitioners, with reimbursement at 85% of the physician fee schedule under Medicare when billing independently.

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Physician Assistant Medical Billing Services
85%

Medicare PA reimbursement vs physician rate

15%

Revenue increase possible through incident-to optimization

168K+

Licensed PAs practicing in the U.S.

28

States with full PA practice authority

Overview

Optimized Billing Strategies for PA-Driven Practices

Physician assistant billing follows rules similar to nurse practitioners, with reimbursement at 85% of the physician fee schedule under Medicare when billing independently. Incident-to billing at 100% is available when the PA provides services under direct physician supervision with an established patient on a physician-initiated plan of care. The supervising physician must be in the office suite, not merely available by phone, for incident-to billing to be compliant.

Credentialing PAs with commercial payers has become easier in recent years, but inconsistencies remain. Some payers credential PAs and reimburse at the physician rate, while others maintain the 85% reduction or require billing under the supervising physician's NPI. Shared visit rules for hospital-based PA services add another layer of complexity, with CMS and commercial payers maintaining different standards for split/shared visit documentation.

Optimized Billing Strategies for PA-Driven Practices
Challenges

Common Physician Assistant billing Challenges We Solve

Every Physician Assistant billing team deals with payer delays, coding nuance, and collection leakage. We tighten those weak points before they turn into write-offs.

Incident-To Compliance Requirements

Incident-to billing at 100% of the physician rate requires the physician to have initiated the care plan, be physically present in the office suite, and the visit must be for an established patient with an existing condition. Violations trigger audits and repayment demands.

Shared Visit Documentation

Shared visits require clear documentation of which provider performed the substantive portion of the encounter. Ambiguous documentation defaults to the PA's NPI at 85% reimbursement, leaving revenue on the table.

State Supervisory Agreement Variations

PA practice authority varies by state, from full practice authority to required physician supervision agreements with specific documentation. Billing must align with the supervisory model in each state.

Credentialing Across Multiple Payers

PAs must be individually credentialed with each payer to bill under their own NPI. Gaps in credentialing prevent billing and create revenue loss during the enrollment period.

Services

Complete Physician Assistant billing Services

Support spans the full revenue cycle, from front-end verification to denial recovery and reporting.

Incident-To Billing Optimization

Shared Visit Documentation Compliance

PA Credentialing and Payer Enrollment

Supervisory Arrangement Documentation

Revenue Modeling for PA Billing Strategies

Multi-Provider Practice Billing Coordination

Coverage

Serving Physician Assistant billing Teams Nationwide

We support independent practices, multisite groups, and growing provider organizations with flexible workflows.

Independent physician groups

Multi-location practices

Private equity backed platforms

Hospital-owned outpatient groups

Guide

The Complete Guide to Physician Assistant billing

Physician Assistant Medical Billing Overview

Physician assistant practices and PA-staffed clinics face a specific set of billing challenges that general medical billing services are not equipped to handle. Billing for PA services correctly requires understanding incident-to billing rules, split and shared visit billing, and the supervision documentation requirements that differ between Medicare, Medicaid, and commercial payers including BCBS, Aetna, and UnitedHealthcare. Getting these rules wrong costs your practice real money on every claim.

The first step is knowing when to bill under the PA’s own NPI versus billing incident-to under the supervising physician’s NPI. This single decision affects reimbursement rate by 15 percent under Medicare, since incident-to billing pays at 100 percent of the physician fee schedule while PA billing pays at 85 percent. It also carries compliance risk if the incident-to requirements are not met precisely. Taking a structured approach to this billing decision on every patient encounter protects both your revenue and your practice from audit exposure.

Common Billing Challenges in Physician Assistant Billing

  • Incident-to requirement failures: For incident-to billing under Medicare, the supervising physician must have personally seen the patient for the initial condition, must be present in the office suite during the PA’s visit, and the treatment plan must be an established one. If any condition is missing, billing under the physician’s NPI is incorrect and creates overpayment liability.
  • Split and shared visit coding errors: When a PA and a physician both participate in a patient encounter, the claim must identify the billing provider as the one who performed the substantive portion of the visit, defined by CMS as more than half of the total time or the key portions of medical decision making. Billing the physician for the full encounter when the PA performed most of the work is a compliance violation.
  • State scope-of-practice mismatches: PA billing privileges vary by state. Some states allow independent practice without physician oversight for certain payers. Others maintain strict supervision requirements that affect how claims are submitted. Billing based on the wrong state model results in systematic denials from payers that require specific supervision documentation.
  • Missing PA credentials on claims: Commercial payers including Humana and Cigna require the PA to be credentialed with the payer individually, separate from the practice or supervising physician. Submitting claims under a PA who is not yet credentialed results in denials that cannot be appealed until credentialing is complete, sometimes causing months of revenue delay.

Key CPT Codes for Physician Assistant Billing

  • 99213: Office visit, established patient, low medical decision making; the most common code for PA-provided follow-up care in primary care and family medicine settings
  • 99203: Office visit, new patient, low medical decision making; frequently used by PAs for initial evaluation of new patients with straightforward conditions
  • 99214: Office visit, established patient, moderate medical decision making; appropriate for established patients with complex chronic conditions managed by PA teams
  • 99406: Smoking and tobacco use cessation counseling visit; 3 to 10 minutes; billable by PAs as a standalone preventive counseling service
  • 99396: Periodic comprehensive preventive medicine evaluation, established patient, 40 to 64 years; PAs can bill annual wellness visits under this code when the full evaluation is performed

Revenue Cycle Considerations for Physician Assistant Billing

PA-staffed practices that have not audited their incident-to billing practices typically discover they have been either leaving money on the table or over-billing, sometimes both simultaneously in different patient scenarios. The 15 percent Medicare reimbursement difference between incident-to and direct PA billing adds up quickly across a high-volume practice. A PA seeing 25 patients per day at an average Medicare reimbursement of $95 per visit loses approximately $356 per day in legitimate incident-to billing opportunities if those claims are submitted under the PA’s NPI when incident-to conditions are met.

Commercial payer credentialing timelines for PAs run 60 to 120 days on average with BCBS, UnitedHealthcare, and Aetna. Practices that onboard PAs without immediately beginning the credentialing process find themselves billing under the supervising physician for months, which creates split-billing compliance risks. A structured onboarding and credentialing tracking system prevents this pattern from becoming a revenue and compliance problem.

How My Medical Bill Solution Helps Physician Assistant Practices

Step one: we audit your current billing setup to determine whether you are billing incident-to, direct, or split and shared correctly for every encounter type. Step two: we identify which PAs are credentialed with which payers and flag any gaps that need to be resolved. Step three: we build a compliant claim workflow that assigns the correct billing NPI and reimbursement pathway to every patient visit type your practice sees. Step four: we monitor every claim through to payment and work denials immediately so your A/R does not age past 45 days.

My Medical Bill Solution understands the specific compliance pressures that come with PA billing. Our team stays current on CMS split and shared visit guidance, state supervision requirements, and commercial payer credentialing rules. We handle the complexity so your clinical staff can focus on patients. Contact us today to schedule your billing assessment.

Common Questions

Frequently Asked Questions About Physician Assistant billing

Answers to the questions practice owners and managers ask most often before switching billing partners.

What is the difference between incident-to billing and billing under the PA's NPI?

Incident-to billing submits the PA's services under the supervising physician's NPI at 100% of the fee schedule. Billing under the PA's NPI uses the PA's own credentials at 85% of the fee schedule. Incident-to has strict requirements (physician-initiated care plan, physician present in suite, established patient), while own-NPI billing has no such restrictions.

When should a PA bill under their own NPI versus incident-to?

Bill incident-to when all requirements are met: established patient, existing condition with physician-initiated treatment plan, and supervising physician present in the office. Bill under the PA's NPI for new patients, new conditions, hospital visits, home visits, or any encounter where the physician is not in the office suite.

How do shared visit rules work in hospital settings?

In hospitals and facilities, when both a PA and physician see the same patient on the same day, the visit is billed under the provider who performed the substantive portion. Under current CMS rules, substantive portion is defined by who performed more than half of the total time or the key component of medical decision-making.

Do all payers reimburse PAs at 85% of the physician rate?

No, the 85% rate is specific to Medicare. Commercial payers set their own PA reimbursement rates through contract negotiations, and some pay PAs at 100% of the physician rate. Medicaid rates vary by state. We help practices understand and negotiate PA reimbursement rates with each payer.

How do you handle PA billing in states with full practice authority?

In states with full practice authority, PAs can practice and bill independently without a supervisory agreement. We ensure that PA credentialing applications reflect full practice authority status and that billing is set up to capture services at the highest available rate for independent PA practice.

What documentation pitfalls should PA practices avoid?

Common pitfalls include billing incident-to without the physician present, using incident-to for new patients or new conditions, failing to document the substantive portion provider in shared visits, and not maintaining current supervisory agreements. We audit documentation practices to identify and correct these issues.

Comparison

How We Compare for Physician Assistant billing

The difference is operational discipline. We focus on clean submissions, fast follow-up, and transparency.

Criteria My Medical Bill Solution Typical Provider
Specialty-specific billing workflows Included Often generic
Dedicated account ownership Yes Shared queue
Denial root-cause reporting Weekly Ad hoc
Claim submission speed Within 24 hours Varies
Communication cadence Planned check-ins Reactive only

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