G9579 HCPCS Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

HCPCS G9579: No Signed Opioid Treatment Agreement Documented

HCPCS Level II code G9579 denotes the absence of a documented, signed opioid treatment agreement at least once during a course of opioid therapy. The code is used as an administrative marker of documentation gaps in opioid risk mitigation and compliance with treatment agreements. Nationally, tracking documentation of opioid treatment agreements is part of broader efforts to standardize opioid prescribing practices and improve patient monitoring.

This analysis covers major national payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how G9579 is used in practice, national-level benchmarking context where available, and the clinical and administrative implications of missing documentation. The publication summarizes common billing modifiers associated with the service line and indicates where input data is unavailable.

The content provides a concise reference for coding, documentation expectations, and reporting uses of G9579, along with guidance on where to find related information. Data not available in the input is noted when relevant. The goal is to clarify what G9579 represents, why it matters for opioid therapy management, and what stakeholders typically monitor when this code appears on claims.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG9579HCPCS Level IIopioid therapytreatment agreementdocumentationambulatory carecompliancebehavioral health

Billing Code Overview

HCPCS Level II code G9579 indicates no documentation of a signed opioid treatment agreement at least once during opioid therapy. This code captures the absence of a documented, signed opioid treatment agreement for a patient who is receiving opioid therapy.

Service type: Documentation/administrative compliance related to opioid therapy
Typical site of service: Outpatient clinics, physician offices, behavioral health clinics, substance use treatment programs, and other ambulatory care settings where opioid therapy is managed.

Clinical & Coding Specifications

Clinical Context

A typical patient is a 45-year-old adult with chronic noncancer pain receiving ongoing opioid therapy managed in primary care or pain management clinic. The clinician documents opioid prescribing, monitoring (urine drug testing, prescription drug monitoring program checks), and counseling during routine follow-up. As part of best-practice risk mitigation, an opioid treatment agreement (opioid contract) is expected to be signed at least once during the course of opioid therapy. The billing code G9579 is used when the medical record lacks documentation that a signed opioid treatment agreement was obtained at any point during the period of opioid therapy. Typical site of service includes outpatient primary care clinics, pain management clinics, behavioral health integrated clinics, and medication-assisted treatment programs. A realistic workflow: patient arrives for follow-up, clinician reviews pain control and risks, clinic staff attempt to obtain a signed agreement; if no signed agreement is present, G9579 may be reported to indicate missing documentation for quality/reporting purposes. Common patient scenario modifiers include circumstances such as increased procedural complexity or transfer of care; the absence of the agreement may be noted during chart audits or quality reporting processes.

Coding Specifications

Modifier	Description	When to Use
`22`

HCPCS G9796: High-Intensity Statin Therapy

HCPCS-G9970-REFERRAL-REPORT-NOT-RECEIVED

HCPCS G9970: Referral Report Not Received

HCPCS-G9753-TIME-SENSITIVE-CT-PRIOR-IMAGE-SEARCH-OMISSION-DOCUMENTATION

HCPCS G9753: Documentation of Omitted Prior CT Image Search

HCPCS-G8649-KNEE-FUNCTIONAL-STATUS-SURVEY-NOT-COMPLETED

HCPCS G8649: Knee Functional Status Survey Not Completed

HCPCS-G8859-PROLONGED-SYSTEMIC-CORTICOSTEROID-THERAPY

HCPCS G8859: Prolonged Systemic Corticosteroid Therapy, ≥10 mg/day ≥60 days

HCPCS-G9911-CLINICALLY-NODE-NEGATIVE-INVASIVE-BREAST-CANCER-T1-T2-N0

HCPCS G9911: Clinically Node-Negative Invasive Breast Cancer (T1/T2)

HCPCS-G9089-COLON-CANCER-ADENOCARCINOMA-DISEASE-STATUS-STAGING

HCPCS G9089: Colon Cancer, Adenocarcinoma Predominant, Disease Status

HCPCS-G9764-SYSTEMIC-THERAPY-PSORIASIS-VULGARIS

HCPCS G9764: Systemic Therapy for Psoriasis Vulgaris

HCPCS-G9945-LUMBAR-SPINE-PATHOLOGY-SCOLIOSIS-FRACTURE-INFECTION

HCPCS G9945: Lumbar Spine Pathology — Fracture, Infection, or Scoliosis

HCPCS-G0482-DEFINITIVE-MASS-SPECTROMETRY-DRUG-TESTING-15-21-CLASSES

HCPCS G0482: Definitive Mass-Spectrometry Drug Test, 15–21 Drug Classes

Showing 1–10 of 1996

Taxonomy Code	Specialty	Notes
`207Q00000X`	Family Medicine	Primary care clinicians commonly manage chronic opioid therapy and obtain agreements.
`208D00000X`	General Practice	General practitioners who prescribe opioids in outpatient settings.
`2084P0800X`	Pain Medicine	Pain specialists managing long-term opioid therapy and risk mitigation.
`208ZP0900X`	Addiction Medicine	Specialists involved when treatment agreements intersect with opioid use disorder management.
`261QM0800X`	Behavioral Health Consultant	Integrated behavioral health clinicians who support counseling and monitoring.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`G9579`	No documentation of signed an opioid treatment agreement at least once during opioid therapy	Directly describes the absence of a required signed opioid treatment agreement during opioid prescribing; used for quality reporting.
`F11.20`	Opioid dependence, uncomplicated	Patients with opioid dependence are often on opioid therapy or treatment programs where agreements are relevant.
`G89.2`	Chronic pain, not elsewhere classified	Chronic pain diagnoses frequently prompt long-term opioid prescribing and require risk mitigation documentation.
`M54.5`	Low back pain	Common chronic pain condition leading to opioid therapy and the need for treatment agreements.
`Z79.891`	Long term (current) use of opiate analgesic	Indicates ongoing opioid therapy; presence/absence of a treatment agreement is clinically relevant.

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 outpatient follow-up visit during which opioid therapy and treatment agreement status are reviewed.
`99214`	Office or other outpatient visit for the evaluation and management of an established patient, typically 25 minutes	Used for more complex visits requiring extended counseling about opioid risks and documentation review.
`99406`	Smoking and tobacco-use cessation counseling visit, intermediate, greater than 3 minutes up to 10 minutes	Example of a behavioral counseling CPT that may be performed during the same encounter as opioid risk counseling.
`99080`	Special reports and presentations, e.g., for governmental purposes (used variably)	Used for reporting or administrative activities related to quality measures and documentation audits.
`80305`	Drug test(s), presumptive, any number of drug classes by wet chemistry methods	Urine drug testing commonly ordered alongside opioid agreements as part of monitoring.

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