CPT® Code 99396

Quick Reference: CPT 99396

• Definition: Periodic comprehensive preventive medicine reevaluation for an established patient aged 40–64—the typical mid-life “annual physical” focused on prevention and screening, not acute complaints.
• Core elements: Age- and sex-appropriate history and physical examination, plus counseling/anticipatory guidance, risk-factor reduction, and ordering of indicated immunizations and screening tests.
• Code selection: Preventive E/M codes are chosen by service type and age, not by MDM or time. The 2021 office E/M overhaul (99202–99215) did not change preventive medicine code selection.
• Frequency: Typically billed once per year. Many commercial plans cover an in-network preventive visit annually; patient cost-sharing may apply to additional problem-oriented services on the same date.
• Medicare exclusion: Original Medicare does not cover CPT preventive medicine codes (99381–99397). Medicare uses IPPE/AWV G-codes instead; do not report 99396 on the same date as G0402, G0438, or G0439.

CPT 99396 is the standard code for a comprehensive preventive evaluation of an established adult patient age 40–64. In practice, it is the mid-life annual preventive exam: updating health history and risks, performing an appropriate comprehensive physical examination, delivering counseling and anticipatory guidance, and ordering evidence-based screening and immunizations as indicated.

A recurring source of confusion is the distinction between preventive care and problem-oriented evaluation and management. Preventive medicine visits (99381–99397) are not leveled by medical decision making or time, unlike office/outpatient E/M codes (99202–99215) after the 2021 changes. If a significant new problem is evaluated or chronic disease is actively managed at the same encounter, that portion may require a separate problem-oriented E/M code with modifier 25, supported by separate documentation and diagnosis linkage.

Another frequent pitfall is payer eligibility. Original Medicare generally does not pay for routine “annual physicals,” instead covering an Initial Preventive Physical Exam (IPPE, “Welcome to Medicare”) and Annual Wellness Visits (AWV) with specific G-codes and requirements. Some Medicare Advantage plans may offer an additional “routine physical” benefit; coverage varies by plan and should be verified in advance.

1. Required Components of a 99396 Preventive Exam

CPT 99396 is a “comprehensive preventive medicine evaluation and management” service for an established patient age 40–64. In preventive services, “comprehensive” means comprehensive for prevention and appropriate to the patient’s age, sex, and risks—not a rigid head-to-toe checklist copied from legacy 1995/1997 E/M documentation rules.

• Age- and sex-appropriate history: Update medical/surgical history, medications, allergies, family history, social history, and preventive risk factors. For mid-life adults, ensure specific attention to cardiometabolic risk (BP, lipids, diabetes risk), tobacco/alcohol/substance use, diet/activity, sleep, sexual health, mental health screening, and occupational/exposure risks when relevant.
• Comprehensive physical exam appropriate to the patient: Document vital signs and targeted systems commonly relevant to screening and risk: cardiovascular, pulmonary, abdominal, neurologic screening as indicated, skin evaluation when appropriate, and sex-specific elements based on practice setting and patient preference (e.g., breast/pelvic components when clinically indicated and performed).
• Counseling and anticipatory guidance: Preventive counseling is not ancillary; it is a core element. For ages 40–64, typical counseling domains include lifestyle and weight, cardiovascular risk reduction, cancer screening timing, immunization updates, and individualized prevention planning based on family history and comorbidities.
• Screening and immunization planning: Ordering is part of the preventive service work; the tests/vaccines themselves are billed separately. Ensure the plan reflects what is due (e.g., colorectal screening at guideline age, breast cancer screening schedules, cervical cancer screening intervals, diabetes/lipid screening, and age-appropriate vaccinations).

A practical way to judge whether the encounter meets 99396 expectations is whether the note clearly reflects (1) a broad preventive update, (2) a comprehensive exam consistent with mid-life prevention, and (3) explicit counseling plus a screening/immunization plan. If the encounter reads primarily like chronic disease follow-up or an acute visit, the preventive code becomes harder to defend—even if the appointment type was “annual physical.”

2. Documentation to Support 99396

Preventive visits are commonly audited when paid at 100% cost-sharing, and denials often stem from documentation that is too sparse, missing counseling, or using the wrong diagnosis structure. Documentation should be sufficient for an outside reviewer to see that the service was comprehensive and preventive in nature.

• History and risk update: Avoid conclusory statements (“history reviewed”). Document key prevention-relevant updates: smoking status, alcohol use, exercise pattern, diet, weight trajectory, sleep, mental health screening results when done, family history changes, and medication reconciliation.
• Exam findings with preventive relevance: A brief but specific exam narrative is stronger than “normal exam.” Include vitals (BP, BMI), focused system findings, and any sex-specific components performed. If an element is declined or not indicated, document the reason (patient preference, not due, etc.).
• Preventive assessment/plan: Make the preventive purpose obvious. List planned screenings and immunizations, and document counseling topics and patient-specific risk reduction plans (weight plan, exercise recommendations, tobacco cessation reinforcement, etc.).
• Separation when problems are addressed: If you also evaluate a significant problem, document it in a distinct problem-oriented section (history/exam/MDM for that problem), and link a problem diagnosis to the problem E/M code. This is central to defending modifier 25 when billed.

Many practices reduce documentation variability by using a structured template or checklist that prompts each required element and counseling domain. This improves clinical completeness and reduces “one missed detail” denials.

3. ICD-10 Coding for Preventive Visits

For preventive services, diagnosis coding determines whether the payer recognizes the service as preventive (and thus eligible for preventive benefits). The most common primary diagnoses are the general adult exam Z-codes:

• Z00.00 – Encounter for general adult medical examination without abnormal findings.
• Z00.01 – Encounter for general adult medical examination with abnormal findings (pair with codes describing the abnormal findings).

When abnormalities are found, Z00.01 should generally be accompanied by the specific abnormality diagnosis (e.g., elevated BP reading, abnormal skin lesion) to justify “with abnormal findings.” Coding guidance for preventive visits commonly emphasizes that the abnormal finding code should be captured even if you do not separately bill a problem E/M—because it is part of the clinical record of what was discovered.

For women’s preventive visits, some practices also use gynecologic exam Z-codes (Z01.419 without abnormal findings; Z01.411 with abnormal findings) depending on specialty and payer preference. For most primary care settings, Z00.00/Z00.01 remains the standard driver for the preventive E/M claim line; gynecologic and screening procedure diagnosis coding often appears on the procedure/lab claims rather than the preventive E/M line.

When both a preventive service and a problem-oriented E/M occur on the same date, correct diagnosis linkage becomes critical. Payer policies commonly require that the preventive code be linked to the preventive Z-code, while the problem E/M line is linked to the complaint/chronic condition diagnosis. Poor linkage (e.g., using only diabetes as the diagnosis on 99396) can cause the payer to treat the visit as non-preventive and apply cost-sharing or deny for benefit mismatch.

4. Medicare Coverage & “Wellness” Exam Differences

Original Medicare generally does not cover routine annual physical exams billed with CPT preventive medicine codes. Medicare instead covers:

• IPPE (G0402): one-time “Welcome to Medicare” preventive visit in the first 12 months of Part B enrollment.
• AWV (G0438/G0439): annual wellness visit focused on risk assessment and a personalized prevention plan, not a comprehensive physical exam.

The AWV is frequently misunderstood by patients as a “physical.” Operationally, many clinicians perform some exam elements in addition to AWV requirements; however, Medicare payment is based on the AWV framework, not on a comprehensive head-to-toe exam. If an acute or chronic problem is evaluated during an AWV, Medicare permits billing a separate problem E/M with modifier 25—mirroring the preventive-plus-problem concept in commercial billing, but with AWV G-codes rather than 99396.

Medicare Advantage nuance: Some Medicare Advantage plans offer an additional routine physical benefit, potentially covering CPT preventive medicine codes. This is plan-specific. If covered, many plans still discourage billing a routine physical and an AWV on the same day; clear scheduling and patient education reduce confusion and reduce claim conflicts.

5. Modifier Usage (25, 24, 33, GC)

Modifier 25 (most common): significant, separately identifiable problem-oriented E/M

Modifier -25 is appended to the problem-oriented E/M code (99202–99215) when a significant problem service is performed on the same date as 99396. It is not appended to 99396. The additional problem service must be documented as distinct work that meets the requirements of a problem-oriented E/M service. Many practices also provide patient-facing communication that addressing problems at a preventive visit may result in cost-sharing on the problem E/M line.

Modifier 24: unrelated E/M during a postoperative global period

Modifier -24 applies when the same physician/group is in a postoperative global period and provides an unrelated E/M service. This can arise in OB/Gyn and surgical practices when a routine preventive exam is unrelated to the procedure/global package and must be unbundled appropriately.

Modifier 33: preventive service

Modifier -33 is generally used to designate preventive intent for services that are not inherently preventive. Because 99396 is inherently a preventive medicine service, modifier 33 is typically unnecessary on the 99396 line itself. When used in preventive contexts, -33 is more often applied to screening procedures under ACA preventive rules than to the preventive E/M code.

Modifier GC: teaching physician services

Modifier -GC indicates a teaching physician service involving a resident under applicable teaching physician requirements. When required by payer policy, the modifier supports compliance with teaching physician billing rules and should align with documentation/attestation requirements.

6. Private Payer Policies & Frequency Limits

Most commercial plans generally allow one adult preventive visit per year in-network, with preventive cost-sharing rules driven by plan design and regulatory requirements. Common operational issues include (1) frequency denials (too soon), (2) denial or reduction of the problem E/M line without modifier 25, and (3) cost-sharing surprises when additional problem services are billed.

• Frequency timing: Some plans enforce “once per calendar year,” others “once per 365 days.” Eligibility checks reduce avoidable denials and patient dissatisfaction.
• Same-day preventive + problem: Many payers publish explicit policies describing how preventive and problem visits are processed together, including documentation and diagnosis linkage expectations. Some payers apply payment reductions to one of the lines per contract.
• Documentation-driven audits: If documentation looks primarily problem-oriented, the payer may downcode or deny the preventive code. Coding resources emphasize that preventive documentation should include counseling and screening planning, not only chronic disease follow-up.

Practical note: tests ordered during a preventive visit are not automatically “free.” Coverage for lab tests depends on the service, diagnosis, and plan rules. Patients should be informed that some labs (e.g., vitamin D, certain expanded panels) may not be considered preventive by their insurer even when ordered during a preventive encounter.

7. Comparison: 99395 vs 99396 vs 99397

Established-patient preventive medicine codes are age-based. The service elements are similar (comprehensive preventive history/exam/counseling/screening planning), but prevention priorities differ by age group. Select the code that matches the patient’s age on the date of service and confirm established vs new status (new if not seen in the past 3 years within the same group and specialty).

8. Complex Clinical Scenarios

Scenario 1: Preventive visit with a new acute complaint

Patient: 43-year-old established patient scheduled for an annual preventive exam. Near the end of the encounter she reports an itchy ankle rash that began one week ago.

Work performed: In addition to completing the preventive history/exam/counseling/screening plan, the clinician takes a focused HPI for the rash, examines the lesion in detail, considers differential diagnosis (eczema vs contact dermatitis), prescribes medication, and provides follow-up instructions.

Coding: Bill 99396 for the preventive service and bill an appropriate established-patient E/M (e.g., 99213) with modifier -25 for the separately identifiable problem service. Link Z00.00/Z00.01 to 99396 and the rash diagnosis to the E/M line, consistent with payer policy expectations.

Why it is compliant: Guidance on combining preventive and problem-oriented visits emphasizes that separately identifiable problem work can be reported when documented distinctly and supported by a problem diagnosis and modifier 25.

Scenario 2: Preventive visit with minor abnormal findings (no separate E/M)

Patient: 55-year-old established patient with no acute complaint. BP is elevated today (e.g., 150/95), but repeat is lower and no immediate work-up or medication is initiated.

Work performed: The clinician documents the finding, provides preventive counseling (diet, activity, salt reduction), and schedules a follow-up BP check rather than initiating active disease management at this visit.

Coding: Bill 99396 only. Use Z00.01 plus a code describing the abnormal finding (e.g., elevated BP reading).

Why it is compliant: Not every abnormality creates a separately identifiable problem E/M; when management is limited to preventive counseling and routine follow-up planning, it commonly remains within the preventive service scope.

Scenario 3: Preventive visit plus active chronic disease management

Patient: 60-year-old established patient with diabetes and hypertension schedules her annual preventive exam but also requests medication adjustment due to recent home BP readings above goal.

Work performed: Preventive components are completed (screenings, immunizations, counseling), and the clinician also performs active chronic disease management: reviews logs, assesses control, adjusts antihypertensive therapy, orders condition-specific monitoring labs, and sets a short-interval follow-up plan.

Coding: Bill 99396 plus a problem-oriented E/M (often 99214 depending on documented MDM) with modifier -25. Link preventive Z-code to 99396 and chronic condition diagnoses to the problem E/M line, as emphasized in payer guidance on same-day services.

Why it is compliant: When significant problem work is separately documented and meets E/M requirements (e.g., prescription drug management and evaluation of multiple chronic conditions), reporting both services is supported by published coding guidance.

These scenarios illustrate a consistent rule: bill 99396 when the service is truly preventive in scope, and add a separate E/M code only when the problem-oriented work is significant, separately identifiable, and documented clearly enough to stand on its own in an audit.