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    v1.0.31
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g2077-periodic-assessment-opioid-treatment-program
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    HCPCS G2077: Periodic Assessment in Opioid Treatment Program

    HCPCS Level II code G2077 describes a periodic assessment performed by an opioid treatment program (OTP) practitioner that reviews medication dosing, treatment response, other substance use disorder treatment needs, patient-identified goals, and relevant physical, nutritional, and psychiatric needs; the service may be informed by a standardized, evidence-based assessment and can include evaluation of need or interest in harm reduction interventions and recovery support services. Service type: periodic patient assessment within an opioid treatment program. Typical site of service: opioid treatment program/behavioral health clinic or other settings where a Medicare-enrolled OTP provides services.

    For related coverage guidance, see recent payer policy updates: Achalasia and Gastroesophageal Reflux Disease (GERD) - Minimally Invasive Procedures - Medical Policy, Esophageal Brush Biopsy, Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disorders.

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    Clinical & Coding Specifications

    Clinical Context

    A 46-year-old patient enrolled in a Medicare-enrolled Opioid Treatment Program (OTP) presents for a periodic assessment with the OTP practitioner (physician, nurse practitioner, or certified addiction counselor). The patient has been stable on buprenorphine-naloxone for opioid use disorder but reports occasional cravings and recent alcohol use. The OTP practitioner conducts a structured review of medication dosing and adherence, assesses treatment response and side effects, screens for other substance use and psychiatric symptoms, reviews nutrition and physical health needs, updates patient-identified recovery goals, and evaluates interest in harm reduction interventions (e.g., naloxone distribution, safer-use counseling) and recovery support services. A standardized, evidence-based assessment tool is administered to quantify symptoms and guide care planning. The periodic assessment is documented in the electronic health record, including medication review, standardized assessment results, recommendations for dose adjustment if clinically indicated, referrals to behavioral health or medical services, and any harm reduction or recovery supports provided or planned. The service is billed separately in addition to primary OTP services for that visit using G2077.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99406Smoking and tobacco use cessation counseling visit, intermediate, greater than 3 minutes up to 10 minutesMay be provided during the periodic assessment when addressing tobacco use as part of comprehensive substance use care.
    99408Alcohol and/or substance (other than tobacco) abuse structured screening and brief intervention, 15 to 30 minutesOften performed alongside G2077 when a structured brief intervention is indicated after screening.
    96127Brief emotional/behavioral assessment (e.g., depression inventory) with scoring and documentation, per standardized instrumentUsed when a quick standardized screening (depression, anxiety, substance use severity) is administered during the periodic assessment.
    99407Smoking and tobacco use cessation counseling, intensive, greater than 10 minutesUsed when in-depth cessation counseling is delivered as part of the visit.
    99412Prevention counseling and/or risk factor reduction intervention(s) provided to individuals in a group settingApplicable if group-based recovery support or educational interventions are provided as follow-up to the periodic assessment.

    Related Modifiers

    6 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    95Modifier 95 indicates that a service was provided via synchronous, real‑time audio‑video telehealth rather than in‑person. Per CMS, AAPC and professional associations, append modifier 95 to claim…- Use modifier 95 to indicate a service was furnished via synchronous, real‑time audiovisual telehealth (a live audio‑video conference between patient and provider) rather than in‑person. - Pair…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2084P0800X
    363L00000X
    163W00000X
    251B00000X
    207VH0002X
    374J00000X
    106E00000X
    111NX0800X

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 3

    10 rows

    PolicyPayerEffective Date
    Achalasia and Gastroesophageal Reflux Disease (GERD) - Minimally Invasive Procedures - Medical PolicyHealth-New-England2027-02-01
    Esophageal Brush Biopsycaresourcegeorgia2026-12-01
    Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disordersbcbsvermont2026-12-01
    Gastric Pacing/Gastric Electrical Stimulation (GES)Cigna2026-11-15
    Percutaneous Electrical Nerve Field Stimulation for Disorders of Gut-Brain Interactionpremerabluecrossofwashington2026-11-06
    Percutaneous electrical nerve field stimulation for disorders of gut-brain interactionpremerabluecrossofwashington2026-11-06
    Percutaneous Electrical Nerve Field Stimulation for Disorders of Gut-Brain Interactionpremerabluecrossofwashington2026-11-06
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Non-invasive Testing for Liver FibrosisModa Health2026-11-01
    Surgical Site of Care - Colonoscopy and Sigmoidoscopyregence2026-11-01

    Related Codes

    HCPCS-G9490-HOME-ASSESSMENT-NON-HOMEBOUND

    HCPCS G9490: Home Visit Patient Assessment for Non-Homebound Beneficiary

    HCPCS-G0008-INFLUENZA-VACCINE-ADMINISTRATION

    HCPCS G0008: Administration of Influenza Virus Vaccine

    HCPCS-G0009-PNEUMOCOCCAL-VACCINE-ADMINISTRATION

    HCPCS G0009: Administration of Pneumococcal Vaccine

    HCPCS-G0010-HEPATITIS-B-VACCINE-ADMINISTRATION

    HCPCS G0010: Administration of Hepatitis B Vaccine

    HCPCS-G0011-PREP-COUNSELING-HIV-RISK-REDUCTION-ADHERENCE

    HCPCS G0011: Individual PrEP Counseling, HIV Risk Assessment

    HCPCS-G0012-PRE-EXPOSURE-PROPHYLAXIS-INJECTION-HIV-PREVENTION

    HCPCS G0012: Injection of PrEP Drug for HIV Prevention

    HCPCS-G0013-PREP-INDIVIDUAL-COUNSELING-HIV-RISK-REDUCTION

    HCPCS G0013: Individual PrEP Counseling by Clinical Staff

    HCPCS-G0017-PSYCHOTHERAPY-CRISIS-FIRST-60-MINUTES-NON-OFFICE

    HCPCS G0017: Psychotherapy for Crisis, First 60 Minutes

    HCPCS-G0018-PSYCHOTHERAPY-CRISIS-ADDITIONAL-30-MINUTES-NON-OFFICE

    HCPCS G0018: Psychotherapy for Crisis, Additional 30 Minutes

    HCPCS-G0019-COMMUNITY-HEALTH-INTEGRATION-SDOH-CARE-COORDINATION

    HCPCS G0019: Community Health Integration, Person-Centered Assessment

    Showing 1–10 of 1996

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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