Nurse Practitioner Billing and Coding sits at the intersection of clinical scope, Medicare regulations, state practice authority laws, and payer-specific policies making it one of the most nuanced billing environments in US outpatient healthcare.
An NP who doesn’t understand the difference between independent billing at 85% and incident-to billing at 100% is leaving 15% on the table on every qualifying Medicare visit. An NP-led practice that has never billed Chronic Care Management codes is leaving $50,000–$100,000 per year uncaptured from care coordination work already being done. An PMHNP who bills the wrong combination of psychiatric E/M and psychotherapy add-on codes is either underbilling or creating compliance exposure sometimes both.
These aren’t edge cases. They are the daily billing reality for NP practices that haven’t had their billing reviewed against current guidelines.
This guide covers the billing and coding guidelines that matter most for nurse practitioner practices in 2026 incident-to billing rules, NP-specific Medicare rates, care management codes, PMHNP-specific coding, telehealth, credentialing, and the compliance standards that govern NP billing across all payer types.
Part 1 — NP Medicare Billing Rates: 85% vs. 100%
The Foundational Rule
Medicare reimburses services billed under a nurse practitioner’s own NPI at 85% of the Medicare Physician Fee Schedule (MPFS) rate. This applies to all NP-billed services where the NP is the rendering and billing provider.
This is not a discount. It is the statutory Medicare reimbursement rate for non-physician practitioners (NPPs) established under the Balanced Budget Act of 1997. Every NP billing Medicare independently should know this rate and build revenue projections around it.
When NPs Can Bill at 100% — Incident-To Rules
Under Medicare’s incident-to billing provision, services rendered by an NP in a physician’s office setting can be billed under the supervising physician’s NPI at 100% of the MPFS rate — eliminating the 15% reduction — when all of the following conditions are simultaneously met:
Condition 1 — In an office or clinic setting Incident-to billing applies only in the physician’s office or clinic. It does not apply in hospital settings, skilled nursing facilities, or the patient’s home.
Condition 2 — Physician established the plan of care A physician must have personally seen the patient and established the plan of care for the condition being treated by the NP. If the NP is managing a new problem or a problem the physician has never addressed, incident-to does not apply to that service.
Condition 3 — NP is continuing the established plan The NP must be delivering a service within the physician’s established plan — not treating a new, unrelated condition. If during an incident-to visit the patient presents with a new complaint, that new complaint cannot be billed incident-to.
Condition 4 — Supervising physician is in the office suite The supervising physician must be physically present in the same office suite during the visit — not just on-call, not just in the same building, not available by phone. Physically present in the suite.
Condition 5 — NP is employed by or contracted with the practice The NP must be working under the physician’s supervision in an employment or contractual relationship.
The financial impact of incident-to billing correctly:
| Scenario | Billing NPI | Medicare Rate |
|---|---|---|
| NP bills independently | NP’s NPI | 85% of MPFS |
| Qualifying incident-to visit | Supervising physician’s NPI | 100% of MPFS |
| New problem during visit | Cannot be incident-to | 85% under NP’s NPI |
For an NP with 40% of visits qualifying for incident-to billing, correct application adds 15% to reimbursement on those visits. On a practice generating $400,000 in annual Medicare collections, that’s $24,000–$30,000 in additional revenue from billing the same clinical services under the correct NPI.
Common incident-to errors:
- Billing all visits under the NP’s NPI even when incident-to eligibility exists
- Billing new problems as incident-to (compliance violation)
- Applying incident-to when the supervising physician is off-site (compliance violation)
- Not tracking which visits qualify vs. which don’t in the billing system
Part 2 — 2021 AMA E/M Guidelines Applied to NP Practice
The 2021 AMA E/M revision applies equally to NPs and physicians. E/M code level for established patients is determined by medical decision-making complexity or total time on the date of encounter not history, exam, or historical coding habits.
E/M Code Selection for NP Office Visits (2026)
| Code | Patient Type | MDM Level | Time-Based |
|---|---|---|---|
| 99202 | New | Straightforward | 15–29 min |
| 99203 | New | Low | 30–44 min |
| 99204 | New | Moderate | 45–59 min |
| 99205 | New | High | 60–74 min |
| 99211 | Established | N/A (minimal) | Less than 10 min |
| 99212 | Established | Straightforward | 10–19 min |
| 99213 | Established | Low | 20–29 min |
| 99214 | Established | Moderate | 30–39 min |
| 99215 | Established | High | 40–54 min |
MDM complexity in NP primary care context:
99214 Moderate complexity — Managing two or more chronic conditions (hypertension AND diabetes, depression AND hypothyroidism), reviewing and interpreting diagnostic results, prescription drug management with documented monitoring requirements, or ordering new diagnostic workup for an undiagnosed problem.
99215 High complexity — Severely unstable chronic condition, high-risk medication management (opioids, anticoagulants, immunosuppressants), new problem requiring urgent intervention, or multiple conditions with high-risk treatment decisions.
The undercoding reality in NP practices: Most NP practices default to 99213 for established patients regardless of visit complexity. For NPs managing chronic disease panels where the majority of visits involve multiple chronic conditions and medication management, 60–70% of visits should be coded at 99214 under current guidelines. The annual revenue gap from systematic 99213 defaults in an NP practice with 300 established patient visits per month: $60,000–$90,000.
Time-Based E/M Billing for NPs
Total time — including pre-visit chart review, face-to-face encounter time, and post-visit documentation on the same date — can be used to select E/M level. This is particularly useful for NPs who conduct longer, more thorough visits that may qualify for higher levels by time even when MDM alone doesn’t reach the threshold.
Document total time explicitly in the note: “Total time today including pre-visit chart review, face-to-face time, and documentation: 35 minutes.” This supports 99214 on time basis when MDM is borderline.
Part 3 — Care Management Codes for NP Practices
Care management codes represent the largest single uncaptured revenue opportunity for NP primary care practices with Medicare panels. Most NP practices have never billed a single unit of these codes.
Chronic Care Management (CCM)
Medicare pays for non-face-to-face care coordination for patients with two or more chronic conditions expected to last at least 12 months or until death.
CCM CPT Codes:
| Code | Description | Monthly Reimbursement (approx.) |
|---|---|---|
| 99490 | First 20 minutes of clinical staff time per calendar month | ~$42 |
| 99439 | Each additional 20 minutes of clinical staff time | ~$37 |
| 99491 | First 30 minutes of physician or QHP time (NP qualifies) | ~$81 |
| 99487 | Complex CCM — first 60 minutes | ~$92 |
| 99489 | Complex CCM — each additional 30 minutes | ~$43 |
CCM eligibility requirements:
- Patient has two or more chronic conditions
- NP or supervising physician provides a written care plan
- Patient provides verbal consent (documented) before first month of CCM
- Practice has 24/7 access capability for urgent care needs
- Electronic health record is used to create and share care plan
CCM workflow for NP practices: Month 1: Consent obtained, comprehensive care plan developed, baseline conditions documented. Each subsequent month: At least 20 minutes of non-face-to-face care coordination activity documented — phone calls with specialists, medication reconciliation, care coordination communications, patient outreach.
Revenue calculation: An NP practice with 100 qualifying CCM patients billing 99490 monthly generates $4,200/month — $50,400 per year — from care coordination work the practice is already delivering.
Principal Care Management (PCM)
PCM covers care management for patients with a single complex chronic condition expected to last 3+ months requiring substantial care management.
| Code | Description | Reimbursement (approx.) |
|---|---|---|
| 99424 | PCM — first 30 minutes, physician or QHP | ~$65 |
| 99425 | PCM — each additional 30 minutes | ~$40 |
| 99426 | PCM — first 30 minutes, clinical staff | ~$50 |
| 99427 | PCM — each additional 30 minutes | ~$37 |
PCM is appropriate for patients who don’t qualify for CCM (single complex condition) but require active monthly management — a patient with advanced COPD, complex diabetes, or severe heart failure managed primarily by the NP practice.
Transitional Care Management (TCM)
When an NP manages a patient’s transition from hospital, SNF, or observation back to the community setting, TCM codes are separately billable:
| Code | Description | Medicare Rate (approx.) |
|---|---|---|
| 99495 | Moderate complexity — contact within 2 business days, face-to-face within 14 days | ~$168 |
| 99496 | High complexity — contact within 2 business days, face-to-face within 7 days | ~$237 |
TCM requirements:
- Interactive contact with patient (or caregiver) within 2 business days of discharge
- Medication reconciliation
- Face-to-face visit within 7 days (99496) or 14 days (99495) of discharge
- Discharge summary review
- Care coordination for needed follow-up
NP practices managing patients with hospitalizations should track discharges and initiate the TCM workflow within 48 hours of discharge notification. Most practices perform this work routinely and bill for none of it.
Remote Patient Monitoring (RPM) (Nurse practitioner billing & coding)
NPs managing patients with hypertension, diabetes, COPD, or heart failure are well-positioned to capture RPM revenue:
| Code | Description | Reimbursement (approx.) |
|---|---|---|
| 99453 | Device setup and patient education (one-time) | ~$19 |
| 99454 | Device supply, daily recordings, 30-day period | ~$64 |
| 99457 | Treatment management — first 20 minutes/month | ~$49 |
| 99458 | Each additional 20 minutes/month | ~$38 |
For an NP practice enrolling 50 patients in RPM for hypertension management: 99454 ($64 × 50 = $3,200/month) + 99457 ($49 × 50 = $2,450/month) = $5,650/month. $67,800 per year. From connected device monitoring and management work the NP is already doing in modified form.
Part 4 — Annual Wellness Visit and Preventive Care Coding
Medicare Annual Wellness Visit Codes
| Code | Description | When to Use |
|---|---|---|
| G0438 | Initial Annual Wellness Visit | First AWV after 12 months of Medicare Part B enrollment |
| G0439 | Subsequent Annual Wellness Visit | Each year following the initial AWV |
AWV ≠ physical exam. The Medicare AWV is a prevention-focused review — health risk assessment, advance care planning discussion, personalized prevention plan, depression screening, cognitive impairment screening, and vital signs. It is not a head-to-toe physical examination. Documenting it as an exam and billing G0438/G0439 is a documentation mismatch.
AWV + Modifier 25 combination billing:
When a separately identifiable problem is addressed during an AWV — a new complaint, an abnormal finding requiring evaluation, medication management for a separate condition — the problem-focused E/M is separately billable alongside the AWV code. The E/M code requires Modifier 25 appended.
This combination billing is missed on the majority of AWV visits in NP practices. Every NP who conducts AWVs and also addresses problems during those visits should be billing both services — consistently.
AWV documentation requirements:
- Health risk assessment (standardized instrument or structured history)
- Review of medical and family history
- Current providers and suppliers list
- Established list of risk factors and conditions
- Advance care planning discussion (if patient agrees)
- Written individualized prevention plan
Part 5 — PMHNP Billing and Coding Guidelines (Nurse Practitioner Billing and Coding)
Psychiatric-Mental Health Nurse Practitioners (PMHNPs) have a distinct coding framework that differs significantly from primary care NP billing.
Psychiatric Diagnostic Evaluations
| Code | Description | When to Use |
|---|---|---|
| 90791 | Psychiatric diagnostic evaluation | Initial evaluation without medical services (no Rx management); prescribing PMHNPs use this for first evaluation when physical exam isn’t performed |
| 90792 | Psychiatric diagnostic evaluation with medical services | Initial evaluation includes E/M component (physical exam, review of medical history); use when PMHNP conducts physical exam as part of psychiatric evaluation |
Psychotherapy Time-Based Codes (Standalone — When No E/M Is Performed)
| Code | Time Range | Notes |
|---|---|---|
| 90832 | 16–37 minutes | Code based on documented psychotherapy minutes — not scheduled session length |
| 90834 | 38–52 minutes | Most common psychotherapy code |
| 90837 | 53+ minutes | Higher reimbursement; document session start/stop time |
The documentation requirement: Session notes must document the start and stop time of the psychotherapy. The code must match the documented therapy time — not the scheduled session duration. A 50-minute scheduled session where the patient arrived 15 minutes late documents 35 minutes of psychotherapy — this is 90832, not 90834.
Psychotherapy Add-On Codes (When E/M IS Performed the Same Session)
When a PMHNP provides both medication management (E/M) and psychotherapy in the same session, the correct billing is the E/M code PLUS the add-on psychotherapy code:
| Add-On Code | Time Range | Base Code |
|---|---|---|
| 90833 | 16–37 minutes of psychotherapy | Added to E/M code (99212–99215) |
| 90836 | 38–52 minutes of psychotherapy | Added to E/M code |
| 90838 | 53+ minutes of psychotherapy | Added to E/M code |
The compliance distinction: When both medication management and psychotherapy are delivered in the same session, bill the E/M code (reflecting MDM complexity) PLUS the appropriate add-on code (reflecting psychotherapy time). Do NOT bill the standalone psychotherapy code (90832/90834/90837) when E/M was also performed — that’s incorrect coding.
Group Therapy
CPT 90853 — Group psychotherapy — is billed per patient per session. One unit for each patient attending the group. Not one unit per group session.
If a PMHNP runs a group of 8 patients: 8 claims, each with 90853 × 1 unit, each with the individual patient’s insurance. Groups billed as a single session claim are systematically underbilled.
Part 6 — NP Telehealth Billing Guidelines 2026
Place of Service Codes for NP Telehealth
| POS Code | Description | When to Use |
|---|---|---|
| POS 10 | Telehealth — patient in home | Most NP telehealth visits (patient joining from home) |
| POS 02 | Telehealth — other than patient’s home | Patient at clinic, FQHC, or other originating site |
| POS 11 | Office | In-person visits only — incorrect for telehealth |
The most common NP telehealth billing error: using POS 11 for all visits regardless of delivery method. POS 11 on a telehealth visit creates a documentation-to-claim mismatch that is an active Medicare audit target.
Telehealth Modifiers for NP Visits
| Modifier | Use Case |
|---|---|
| 95 | Synchronous audio/video — required by most commercial payers |
| GT | Required by some Medicaid programs; older payer systems |
| 93 | Audio-only visits (when patient lacks video capability) |
| FQ | Medicare audio-only visits |
Apply Modifier 95 on commercial payer telehealth claims. Apply Modifier FQ on Medicare audio-only claims. Verify GT vs. 95 requirement for state Medicaid programs individually — requirements are not consistent across states.
Medicare Annual In-Person Visit Requirement for Mental Health Telehealth
For PMHNPs delivering behavioral health services via telehealth to Medicare patients, an in-person visit is required:
- Within 6 months of the first telehealth behavioral health service
- At least annually thereafter
This requirement is now permanent under current law. PMHNPs with Medicare patients receiving telehealth-only mental health services must track in-person visit dates and ensure the annual requirement is met.
Part 7 — NP Credentialing and Enrollment Guidelines
Medicare Enrollment for NPs
NPs must be enrolled in Medicare under their own NPI through the CMS 855I application before billing Medicare. Enrollment requires:
- Current state RN license
- Current state NP license or certification
- Current national certification (AANP or ANCC)
- Current DEA registration (if prescribing controlled substances)
- Malpractice insurance coverage
- Practice location information
Medicare enrollment timeline: Typically 60–90 days for initial enrollment. Begin the process 90–120 days before the NP plans to see Medicare patients.
PECOS: All NP Medicare enrollments are managed through PECOS (Provider Enrollment, Chain, and Ownership System). NPs must maintain current PECOS information — address changes, new locations, and ownership changes must be reported within 30 days.
Revalidation: Medicare requires NPs to revalidate their enrollment periodically. Revalidation notices arrive by mail; failure to respond before the deadline results in Medicare billing deactivation.
Incident-To Credentialing Requirements
For incident-to billing, the NP must be enrolled with Medicare under their own NPI — and the supervising physician must be enrolled under their NPI. The incident-to billing is submitted under the physician’s NPI, but both providers must have active Medicare enrollment.
CAQH and Commercial Payer Enrollment
NPs should maintain a CAQH ProView profile that is attested every 120 days. CAQH attestation lapses delay commercial payer credentialing processes for all payers simultaneously.
Commercial payer enrollment timelines for NPs:
- Major national commercial plans: 60–120 days
- Medicare Advantage: 60–90 days
- Medicaid: 45–90 days
Begin enrollment with all target payers at least 90 days before the NP plans to bill those payers. Rendering claims before enrollment is confirmed results in denials that cannot be retroactively corrected in most cases.
State Practice Authority and Billing
NP billing rights are partly governed by state scope of practice laws. In 2026, 27 states plus DC have full practice authority for NPs — allowing independent practice without physician supervision. The remaining states have reduced or restricted practice authority requiring collaborative or supervisory agreements.
Billing implications of state practice authority:
In full practice authority states, NPs can bill independently without a supervising physician present. In reduced/restricted authority states, the collaborative or supervisory agreement may be required documentation for certain payer credentialing processes and for incident-to billing eligibility.
Verify your state’s current practice authority status — several states updated their NP practice laws in 2024–2025.
Part 8 — Compliance Guidelines for NP Billing
OIG and NP Billing Compliance
The Office of Inspector General has identified NP billing as a compliance focus area — specifically incident-to billing improprieties and billing for services rendered by NPs under physician NPIs without meeting incident-to eligibility requirements.
The specific compliance risk: Billing services under a physician’s NPI when incident-to eligibility wasn’t met — either because the physician wasn’t present in the office suite, because the patient had a new problem not within the physician’s established plan, or because no physician-established plan existed for the condition treated.
Incident-to billing compliance requires a contemporaneous record of which visits met incident-to eligibility — not a general policy that all NP visits are billed incident-to. Each qualifying visit must be documented as meeting all five eligibility conditions at the time of service.
Documentation Standards for NP Billing
Every NP service billed must be supported by documentation in the patient’s medical record that:
- Identifies the rendering provider (the NP who delivered the service)
- Supports the level of service billed (for E/M codes)
- Supports the medical necessity of the service
- Includes the NP’s signature and credentials
For incident-to claims billed under a physician’s NPI, the record should also document that incident-to eligibility was met — that the physician established the plan of care and that the NP was continuing that plan.
How Malakos Healthcare Solutions Applies These Guidelines for NP Practices
At Malakos Healthcare Solutions, nurse practitioner billing is one of our core specialties. Our NP billing service applies incident-to eligibility verification at every qualifying visit, 2021 AMA E/M guidelines to every established patient encounter, CCM and TCM billing workflows, PMHNP-specific add-on code application, telehealth POS and modifier accuracy by payer, and credentialing management for PECOS, CAQH, and commercial payer enrollment.
A free billing audit for NP practices identifies specific revenue gaps in dollar terms — incident-to opportunity, uncaptured CCM revenue, E/M undercoding, and telehealth compliance exposure — before any commitment is made.
Schedule Your Free NP Billing Audit
📞 +1 (307) 441-3431 ✉️ support@malakoshcs.com 📍 Cheyenne, Wyoming — Serving nurse practitioner practices nationwide
Related Reading
- Nurse Practitioner Billing Services
- Nurse Practitioner Case Study — $167K Revenue Recovery
- Medical Coding Services
- Credentialing and Enrollment Services
Malakos Healthcare Solutions | Nurse Practitioner Billing Services USA | This guide reflects 2026 AMA CPT, ICD-10-CM, and CMS guidelines. Individual state laws and payer policies vary. Serving NP practices nationwide since 2022.
