HCPCS M1034: 180-Day Continuous Pharmacotherapy for Opioid Use Disorder - OpenPayer

Summary & Overview

HCPCS M1034: 180-Day Continuous Pharmacotherapy for Opioid Use Disorder

HCPCS Level II code M1034 denotes adults who complete at least 180 days of continuous pharmacotherapy for opioid use disorder (OUD) without a gap exceeding seven days. Nationally, this metric reflects sustained engagement in evidence-based medication treatment for OUD, a focus of federal and commercial quality improvement efforts due to its association with reduced overdose risk and improved retention in care. Common large payers include Aetna, Blue Cross Blue Shield plans, Cigna Health, UnitedHealthcare, and Medicare.

Readers will learn the clinical and administrative meaning of M1034, how it is used to track long-term medication continuity for OUD, and why it matters for quality measurement and program monitoring. The publication provides benchmarks where available, outlines policy context and reporting implications, and summarizes the clinical relevance of a six-month continuous treatment threshold. If specific payer policies, taxonomies, or diagnosis mappings are required, those details are discussed in dedicated sections. Data not available in the input will be noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareM1034HCPCS Level IIopioid use disorderpharmacotherapy continuityquality measuremedication-assisted treatmentoutpatient behavioral healthtreatment retention

Billing Code Overview

HCPCS Level II code M1034 identifies adults who have at least 180 days of continuous pharmacotherapy with a medication prescribed for opioid use disorder (OUD) without a gap of more than seven days. This measure captures sustained medication treatment over a six-month period.

Service type: Ongoing pharmacotherapy adherence monitoring and reporting
Typical site of service: Outpatient medication management and community-based treatment settings, including clinics, outpatient behavioral health programs, and pharmacy-dispensed outpatient therapies

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

An adult patient with opioid use disorder (OUD) is engaged in outpatient medication-assisted treatment and has been prescribed a maintenance pharmacotherapy (for example methadone, buprenorphine formulations, or naltrexone) with documented continuous use for at least 180 days without a gap greater than seven days. Typical workflow begins with an initial addiction medicine or primary care visit establishing OUD diagnosis and initiating medication; subsequent prescription refills, medication reconciliation, and periodic follow-up visits (in-person or telehealth) occur regularly. Pharmacy fill records and electronic health record medication lists are reviewed to confirm continuous pharmacotherapy. Clinical monitoring may include urine drug screening, counseling visits, and coordination with behavioral health services. Typical site of service is outpatient clinic, office-based opioid treatment (OBOT) programs, or community mental health centers. A realistic patient scenario: a 38-year-old male with moderate-to-severe OUD stabilized on buprenorphine/naloxone, attending monthly follow-ups and receiving uninterrupted prescriptions and pharmacy fills for 6+ months, with clinician documentation confirming no gaps >7 days and routine urine drug testing and counseling coordination.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When a service requires substantially greater work than typical and documentation supports increased effort related to prolonged care coordination or complex medication management.

HCPCS Level II M1012: Discharge/Discontinuation of Episode of Care

HCPCS-M1069-FALL-RISK-SCREENING-ASSESSMENT

HCPCS M1069: Patient Screened for Future Fall Risk

HCPCS-M1009-DISCHARGE-EPISODE-OF-CARE

HCPCS M1009: Discharge/Discontinuation of Episode of Care

HCPCS-M1008-OUTPATIENT-RA-ENCOUNTER-ASSESSMENT-LESS-THAN-50-PERCENT

HCPCS M1008: Outpatient Rheumatoid Arthritis Encounter Assessment (<50%)

HCPCS-M1054-URGENT-CARE-ONLY-VISITS

HCPCS M1054: Urgent Care–Only Visits

HCPCS-M1053-LEG-PAIN-VAS-PREOP-POSTOP-ASSESSMENT

HCPCS M1053: Leg Pain VAS Preoperative and One-Year Postoperative Assessment

HCPCS-M1028-HEADACHE-IMAGING-OTHER-THAN-CT-MRI-DOCUMENTATION

HCPCS M1028: Headache Imaging Other Than CT or MRI Documentation

HCPCS-M1017-PALLIATIVE-CARE-ADMISSION

HCPCS Level II M1017: Patient Admitted to Palliative Care Services

HCPCS-M1063-HIGH-DOSE-IMMUNOSUPPRESSIVE-THERAPY

HCPCS Level II M1063: High-Dose Immunosuppressive Therapy

HCPCS-M1059-HOSPICE-OR-PALLIATIVE-CARE-STATUS

HCPCS Level II M1059: Hospice or Palliative Care Status

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Taxonomy Code	Specialty	Notes
2084P0800X	Addiction Medicine	Specialists who manage medication-assisted treatment for OUD.
208D00000X	Family Medicine	Primary care clinicians who initiate and manage buprenorphine-based therapy in outpatient settings.
208000000X	Internal Medicine	Internal medicine physicians providing longitudinal care and OUD pharmacotherapy.
363L00000X	Nurse Practitioner	NPs who prescribe and manage OUD medications in office-based settings under appropriate waivers/regulations.
207Q00000X	Psychiatry & Neurology	Psychiatrists managing OUD with integrated behavioral health and pharmacotherapy.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F11.10`	Opioid use disorder, mild or moderate, uncomplicated	Common primary diagnosis for patients receiving long-term opioid pharmacotherapy such as buprenorphine.
`F11.20`	Opioid use disorder, severe, uncomplicated	Indicates severe OUD requiring sustained pharmacotherapy and monitoring.
`F11.21`	Opioid use disorder, in remission	Relevant for documentation when patient has achieved remission while maintained on medication.
`Z79.891`	Long term (current) use of opiate analgesic	Used to document ongoing opioid agonist therapy in the medication list and problem list.
`Z91.19`	Patient's noncompliance with other medical treatment and regimen	May be used if there are documented gaps or adherence issues addressed in care coordination.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Common follow-up visit code for ongoing medication management and monitoring during maintenance pharmacotherapy for OUD.
`99214`	Office or other outpatient visit for the evaluation and management of an established patient, typically 25 minutes	Used for more complex follow-up visits requiring moderate complexity decision-making related to OUD care and coordination.
`81002`	Urinalysis, by dipstick or tablet reagent for non-automated, without microscopy	Point-of-care urine drug screening often used to monitor adherence and detect illicit substances during OUD treatment.
`80305`	Drug test(s), presumptive, any number of drug classes; definitive testing, e.g., chromatographic method, each drug class	Used for confirmatory or definitive urine/serum drug testing in OUD monitoring.
`99408`	Alcohol and/or substance (other than tobacco) abuse structured screening and brief intervention services, 15 to 30 minutes	Behavioral counseling code frequently performed alongside medication management visits to address substance use behaviors.
`99409`	Alcohol and/or substance abuse structured screening and brief intervention services, greater than 30 minutes	Used when longer counseling or brief intervention is provided in conjunction with pharmacotherapy follow-up.

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