What are the current reimbursement rates and billing procedures for Nurse Practitioners under Medicare, Louisiana Medicaid, and UnitedHealthcare (UHC), specifically the percentage of the physician fee paid to advanced practice providers (APPs) and the structure of the Louisiana Medicaid program, based on research from the past three years?

Nurse Practitioner Reimbursement: Medicare, Medicaid, and Commercial Insurance

Medicare Reimbursement for Nurse Practitioners

Medicare reimburses Nurse Practitioners at 85% of the physician fee schedule rate when billing directly for services. 1, 2

• Direct billing: When NPs bill under their own National Provider Identifier (NPI), they receive 85% of what Medicare pays physicians for the same service 2
• Indirect ("incident to") billing: NPs can also provide services that are billed under a supervising physician's NPI at 100% of the physician rate, though this practice obscures NP contributions in claims data 2
• The frequency of indirect billing has increased substantially—from 10.9 million visits in 2010 to 30.6 million visits in 2018 in fee-for-service Medicare 2
• Indirect billing is more common in states with restrictive scope of practice laws for NPs 2
• Eliminating indirect billing would have saved Medicare approximately $194 million in 2018, with the greatest revenue impact on smaller primary care practices 2

Medicare Billing Procedures

• NPs must use appropriate CPT or HCPCS codes for professional services 1
• Claims are submitted to the Medicare Administrative Contractor (MAC) 1
• For telemedicine services, the GT modifier certifies the beneficiary was present at an eligible originating site 1
• NPs are recognized as eligible distant site providers for telemedicine services under Medicare 1

Louisiana Medicaid Program Structure

Louisiana Medicaid operates with significant state flexibility in determining reimbursement rates, covered services, and provider payment methodologies, though specific current rates for NPs are not detailed in the available evidence. 3, 4

General Medicaid Framework

• State flexibility: Medicaid payments vary by state, with states having discretion over whether to offer prescription drug programs, geographic restrictions, eligible providers, and reimbursement amounts (within federal upper limits) 4
• Payment adequacy concerns: Nationally, Medicaid rates average only 66% of Medicare payment rates for primary care services 5
• Managed care options: States can implement managed care with capitated rates that should be risk-adjusted according to disease severity 5

Pay Parity Considerations

• Some states have implemented "pay parity" policies that reimburse NPs at the full physician Medicaid fee-for-service rate 6
• In states with Medicaid pay parity, NP-led primary care for adults with diabetes demonstrated comparable quality to physician-led care at similar cost 6
• For children with asthma in pay parity states, NP-led care showed lower costs but mixed quality findings 6

Common pitfall: Medicaid payment policies are not guaranteed for all services, technologies, or practitioners, and providers may discover after delivering care that they are ineligible for reimbursement or receive lower rates than expected 4

Commercial Insurance: General Framework

Commercial insurers typically follow varied reimbursement policies, with 21 states and the District of Columbia requiring some form of telehealth parity for private insurance plans as of 2015. 4

Private Insurance Characteristics

• Variable policies: Private payers have recognized cost benefits and taken steps to reimburse for more types of services than public health plans 4
• Telehealth parity: States are increasingly mandating coverage of telemedicine at the same rate as in-person visits, primarily affecting private insurers 4
• Payment structure: Private insurance typically follows fee-for-service structures, though managed care with global payments has become more common since the 1990s 7

Reimbursement Rates

• The evidence does not provide specific percentage rates for NP reimbursement by major commercial insurers like UnitedHealthcare
• Private insurance payment rates for NPs are generally higher than Medicaid but vary by contract and state regulations 8
• Higher out-of-pocket liabilities are reported among patients with private insurance 8

Key Billing and Payment Challenges

Provider payment problems disproportionately affect clinicians caring for populations served by NPs, including inadequate payment rates, uncompensated confidential services, and rejection of certain billing codes. 8

• Medicaid and private insurance rates often fail to cover the time needed to serve complex patients adequately 8
• Providers report inability to obtain payment for confidential reproductive, mental health, and substance abuse services 8
• Few insurers reimburse CPT billing codes related to health education and chronic care management 8
• Many insurers restrict coverage of certain ICD-9/ICD-10 diagnostic codes 8

Critical consideration: The inadequacy of payment rates under both Medicare and Medicaid contributes to health-related disparities in access and outcomes, with payment often covering only a fraction of actual care costs 5