Annual Wellness Visit CPT Codes: What Commercial Insurers Cover vs. Medicare

One of the most persistent billing errors in preventive care is applying the wrong Annual Wellness Visit (AWV) code to the wrong payer. Medicare and commercial insurers do not share the same code set - they operate entirely different frameworks with different clinical requirements, eligibility windows, and reimbursement structures. Billing a commercial preventive code to Medicare results in denial. Billing a Medicare-specific HCPCS code to a commercial insurer produces the same outcome. This guide clarifies exactly which codes apply to which payers, what each requires, and where providers most commonly go wrong.

Why the Two Systems Are Fundamentally Different

Medicare wellness visits are not routine annual physicals. They are structured preventive screenings focused on health risk assessment, personalized care planning, and identifying gaps in preventive services - with no comprehensive head-to-toe physical exam required or expected. Medicare uses HCPCS Level II codes (G-codes) created specifically for this purpose.

Commercial insurers, by contrast, reimburse annual wellness visits under the standard CPT preventive medicine service codes (99381–99397), which do encompass full physical examinations including age-appropriate screenings, physical assessments, and counseling. The clinical scope is meaningfully broader.

Billing the 99xxx preventive series to Medicare as a "wellness visit" results in consistent claim denial or patient liability. Understanding which framework applies to each patient is a foundational competency - not an advanced billing nuance.

Medicare AWV Code Structure

Medicare uses three primary HCPCS codes for Annual Wellness Visits, each tied to a specific stage in a beneficiary's enrollment timeline: G0402 for the "Welcome to Medicare" exam within the first 12 months of Part B enrollment, G0438 for the first Annual Wellness Visit, and G0439 for every subsequent Annual Wellness Visit once a year after that. 

Per CMS Medicare Preventive Services guidance, all three visits are covered under Medicare Part B at no cost to the beneficiary - no co-pay, no deductible. This zero cost-sharing structure makes AWVs one of the strongest patient engagement touchpoints available to primary care practices.

A critical timing detail: Medicare uses a month-based eligibility rule. A patient who receives a G0439 on April 10, 2025, becomes eligible again on April 1, 2026 - the first day of the same calendar month the following year, not the exact anniversary date.

What Each Medicare AWV Code Requires

G0402 (IPPE) is a one-time benefit available only within the first 12 months of Medicare Part B enrollment. It covers baseline health history, vital signs, vision screening, and orientation to Medicare's preventive benefits. Completing the IPPE does not replace G0438 - a patient can receive both in their Medicare lifetime, but not within the same 12-month period.

G0438 (Initial AWV) requires building a comprehensive baseline from scratch. Required elements include:

• A completed Health Risk Assessment (HRA) - the clinical centerpiece of the visit
• Medical history, family history, and current medication review
• Cognitive impairment screening using a validated tool
• Depression screening with a standardized instrument
• Functional ability and safety assessment - fall risk, hearing, activities of daily living
• A written Personalized Prevention Plan (PPP) built in collaboration with the patient
• Blood pressure, weight, height, and BMI measurements

G0439 (Subsequent AWV) follows the same general framework but focuses on updating rather than creating documentation. Height measurement and BMI calculation are not explicitly required by CMS for G0439, though weight and blood pressure are required. Most practices are measured as best practices regardless.

AWVs are one of the most efficient clinical encounters for identifying patients who qualify for downstream care management programs. The HRA and medication review conducted during G0438 or G0439 naturally surface patients eligible for Chronic Care Management - a direct pipeline that practices running integrated CCM enrollment workflows can systematically capture without adding a separate screening step.

Commercial Insurance: The 99381–99397 Framework

For non-Medicare patients, annual wellness and preventive visits are billed using CPT codes in the 99381–99397 range. These are split into two series - new patients (99381–99387) and established patients (99391–99397) - differentiated further by age:

Unlike Medicare AWVs, commercial preventive visits under these codes do include comprehensive physical examinations. Medicare does not specifically cover CPT 99396 - instead, Medicare covers the Annual Wellness Visit using codes G0438 and G0439, which are similar but not identical to commercial preventive visit codes.

A 52-year-old established patient presenting with a commercial plan gets billed CPT 99396. The same patient on Original Medicare gets billed G0439. Getting this mapping right on intake is what separates a clean claim from a rework cycle.

Reimbursement under the 99xxx series varies by payer, region, and contract. The ACA requires most commercial plans to cover in-network preventive services without cost-sharing - but self-funded employer plans operate under different rules, and coverage terms vary significantly.

Medicare Advantage: The Eligibility Nuance

Medicare Advantage (MA) plans generally accept G0438 and G0439 and follow Medicare's AWV clinical framework. However, many MA plans use a calendar-year eligibility model rather than Medicare's rolling 12-month window. A patient seen for G0439 in April 2025 may be eligible again as early as January 1, 2026, under certain MA plans - not April 2026 as Original Medicare would require.

Understanding how AWV eligibility interacts with care management program enrollment timing is especially relevant for practices tracking CMS 2026 updates to RPM and CCM billing - where AWV encounters frequently serve as the initiating visit for CCM enrollment.

Add-On Codes Billable With Medicare AWVs

Several services may be billed concurrently with G0438 or G0439 when clinically appropriate and separately documented:

• CPT 99497 – Advance Care Planning, first 30 minutes (~$90); co-pay waived when billed same day as AWV
• CPT G0444 – Annual depression screening (15 min); valid with G0439 only - not with G0438 or G0402
• CPT G0136 – Physical activity and nutrition risk assessment (redefined in 2026)
• CPT G0442/G0443 – Annual alcohol misuse screening and brief counseling session
• CPT G2211 – Longitudinal primary care complexity add-on; permitted with AWVs as of the 2025 fee schedule, continues in 2026

The CMS Medicare Physician Fee Schedule Look-Up Tool confirms current national rates for all of these codes and is the most reliable source for annual rate verification ahead of each billing cycle.

Depression screening (G0444) is explicitly excluded from G0438 and G0402 - billing it with the initial AWV or IPPE produces an automatic rejection. This is among the most commonly misapplied add-on rules in AWV billing.

Common Billing Errors to Avoid

• Billing G0438 more than once per patient lifetime - It is a once-only code; a repeat billing generates an automatic denial regardless of the gap between visits
• Using G0438 within 12 months of the IPPE - The 12-month enrollment window must have fully elapsed before G0438 applies
• Submitting 99396 or 99397 to Medicare - Standard CPT preventive codes are not recognized by Original Medicare for routine annual physicals
• Billing G0444 with G0438 - Depression screening is excluded from the initial AWV; it is only billable with G0439
• Missing documentation of required AWV elements - According to the 2024 Medicare Fee-for-Service Supplemental Improper Payment Data, the AWV overpayment rate was 24.5%, with a projected overpayment amount of $307.5 million - largely driven by incomplete documentation at the time of audit

Practices managing high CCM patient volumes will also benefit from understanding how accurate time tracking across AWV, CCM, and RPM encounters prevents documentation gaps that become compliance vulnerabilities at audit.

Telehealth Delivery of AWVs

Both G0438 and G0439 may be provided via telehealth under current CMS rules. HHS telehealth guidance confirms that AWVs conducted via two-way audio-visual platforms meet the face-to-face standard for Medicare billing. Audio-only telephone visits do not qualify. Providers must use a HIPAA-compliant platform and ensure the patient's location meets originating site criteria for their specific payer.

Telehealth-delivered AWVs are particularly valuable for reaching homebound or rural Medicare patients - populations that also tend to have the highest rates of qualifying chronic conditions for CCM and RPM program enrollment.

Conclusion

The distinction between Medicare AWV codes and commercial preventive visit codes is not a billing technicality - it is the structural difference between a paid claim and a rejected one. G0402, G0438, and G0439 are Medicare-specific, preventive in scope, and structured around health risk assessment rather than physical examination. The 99381–99397 series serves commercial payers and encompasses full physicals assigned by patient age and status.

Getting this mapping right at the point of scheduling protects revenue, eliminates rework, and ensures patients receive the preventive care they are entitled to - at zero cost to Medicare beneficiaries. For practices building scalable AWV programs, the annual wellness visit is also the most efficient single encounter to identify care gaps, initiate CCM enrollment, and establish the documentation baseline that supports compliant chronic disease management throughout the rest of the year.

Frequently Asked Questions 

Q1. Can a Medicare patient be billed for both a G0439 and an E/M visit on the same day?

Yes, both can be billed on the same day if the E/M visit addresses a separate medical issue beyond the wellness visit. The E/M code must include modifier -25 and have separate documentation supporting medical necessity. Without proper documentation, one of the claims may be denied.

Q2. Do commercial insurers require prior authorization for annual wellness visits?

Most commercial insurers do not require prior authorization for in-network preventive wellness visits under ACA guidelines. These services are generally covered without patient cost-sharing. However, providers should still verify plan-specific coverage, especially for out-of-network or self-funded plans.

Q3. What happens if a provider bills G0438 for a patient who already had an IPPE (G0402) in the same 12-month period?

The claim will usually be denied because Medicare does not allow G0438 within 12 months of an IPPE (G0402). Patients must wait at least 12 full months after the IPPE before the initial Annual Wellness Visit becomes eligible for billing.

Q4. Can a nurse practitioner or physician assistant bill Medicare AWV codes, or must it be a physician?

Yes, nurse practitioners, physician assistants, and other qualified healthcare professionals can independently bill Medicare AWV codes under their own NPI. Clinical staff may also assist with portions of the visit under provider supervision.

Q5. Is there a difference in what Medicare pays for G0438 vs. G0439, and why?

Yes, G0438 generally reimburses more because it covers the patient’s first Annual Wellness Visit and requires a full baseline assessment. G0439 is for subsequent yearly visits and mainly updates existing preventive care plans.

Q6. Can the Annual Wellness Visit be delivered via telehealth?

Yes, Medicare allows both G0438 and G0439 to be provided through telehealth using audio-video communication. However, audio-only phone calls do not qualify. Providers must also ensure HIPAA-compliant technology is used.

Q7. What ICD-10 diagnosis code should be used when billing AWV codes?

Common diagnosis codes for AWVs are Z00.00 or Z00.01, depending on whether abnormal findings are present. If an E/M visit is billed on the same day, the E/M code should also include diagnosis codes related to the medical condition being treated.