Summary & Overview
HCPCS G0504: Psychiatric Collaborative Care Management, Additional 30 Minutes
HCPCS Level II code G0504 covers additional 30-minute increments of behavioral health care manager activity within psychiatric collaborative care management, delivered in consultation with a psychiatric consultant and directed by the treating physician or other qualified clinician. The code supplements primary collaborative care management billing and is used for ongoing care management time beyond initial or standard monthly units. Nationally, this code supports integrated care models that expand access to behavioral health services within primary care and outpatient settings and helps quantify non-face-to-face care management efforts.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of what the code represents, payer coverage context, and clinical billing implications for outpatient and clinic-based collaborative care programs. The publication outlines benchmark considerations, common usage patterns, and relevant policy updates affecting recognition and billing of time-based collaborative care management services.
This summary provides clinicians, billing staff, and policy stakeholders with concise guidance on the purpose and operational context of G0504, how it complements primary collaborative care codes, and what to expect when documenting additional behavioral health care manager time in a calendar month. Data not available in the input are noted where applicable.
Billing Code Overview
HCPCS Level II code G0504 describes initial or subsequent psychiatric collaborative care management, billed for each additional 30 minutes in a calendar month of behavioral health care manager activities provided in consultation with a psychiatric consultant and directed by the treating physician or other qualified health care professional. This code is intended to be used in conjunction with G0502 and G0503 and is listed separately in addition to the primary collaborative care management procedure.
Service type: Behavioral health care manager time for collaborative care management (additional 30-minute units)
Typical site of service: Outpatient behavioral health or primary care settings where collaborative care models are implemented, including clinic-based and office-based care directed by the treating clinician.
Clinical & Coding Specifications
Clinical Context
A 42-year-old primary care patient with chronic major depressive disorder and partial response to initial treatment is enrolled in a psychiatric collaborative care program. The primary care physician refers the patient to a behavioral health care manager (BHCM) who provides structured care management, tracks symptoms using standardized tools (e.g., PHQ-9), coordinates medication and psychotherapy recommendations with a consulting psychiatrist, and documents care in the electronic health record. During the month the BHCM spends an additional 45 minutes on care management activities beyond the initial service, including telephone outreach, care coordination with the psychiatrist, review of medication adherence, and updating the treatment plan. The treating physician directs the collaborative care model and the psychiatric consultant provides case review and recommendations. Billing uses G0504 to report each additional 30-minute increment of BHCM activities in consultation with the psychiatric consultant, reported in addition to the primary collaborative care codes (G0502, G0503). Typical workflow steps include: enrollment and consent, baseline assessment, regular BHCM contacts, weekly psychiatrist caseload review, documentation of consultant recommendations, communication of treatment changes to the primary treating physician, and outcome tracking. Typical site of service is ambulatory outpatient primary care clinics, behavioral health clinics embedded in primary care, or community health centers.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure or other service | Use when a separate E/M visit by the treating physician is performed the same day as collaborative care activities and meets E/M documentation criteria |
59 | Distinct procedural service | Use when another service on the same day is separate and distinct from the collaborative care service and no more specific modifier applies |
GT | Via interactive audio and video telecommunications (Telehealth) | Use when BHCM activities are delivered via synchronous telehealth per payer policy |
95 | Synchronous telemedicine service rendered via real-time interactive audio and video | Use for reporting telehealth-delivered collaborative care when payor recognizes modifier 95 |
GQ | Via asynchronous telecommunications system | Use when asynchronous store-and-forward technologies are used and accepted by the payor for components of care management |
CR | Catastrophe/disaster related | Use when services are rendered that are related to a declared catastrophe per payer guidance |
NT | Non-physician practitioner treatment or service | Use where applicable to indicate services furnished by non-physician practitioners when required by payor |
XE | Separate encounter, a service that is distinct because it occurred during a separate encounter | Use when an additional encounter meets criteria for distinctness from the collaborative care encounter |
XP | Separate practitioner, a service that is distinct because it was performed by a different practitioner | Use when another practitioner’s service on the same date is distinct and requires separation |
XU | Unusual non-overlapping service | Use when the additional service is distinct and not normally reported together |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
2084P0800X | Psychiatry & Neurology - Behavioral Health Care Manager (BHCM) | BHCMs (often LCSW, LPC or RN) perform the care management activities billed with G0504 |
2084N0400X | Family Medicine | Primary care physicians who direct collaborative care and order psychiatric consultation |
208D00000X | Psychiatry | Psychiatric consultant providing case review and treatment recommendations |
363LF0000X | Nursing - Behavioral Health | Registered nurses working in collaborative care programs who deliver BHCM tasks |
1041C0700X | Clinical Social Worker | LCSWs commonly serve as behavioral health care managers in collaborative care models |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
F33.1 | Major depressive disorder, recurrent, moderate | Common primary diagnosis managed in collaborative care programs; drives psychiatric consultant involvement and BHCM monitoring |
F32.1 | Major depressive disorder, single episode, moderate | Frequent reason for enrollment in collaborative care for medication management and psychotherapy coordination |
F41.1 | Generalized anxiety disorder | Anxiety disorders commonly co-managed within collaborative care, requiring systematic follow-up and consultant input |
F41.9 | Anxiety disorder, unspecified | Used when anxiety symptoms require collaborative management but specific subtype is not documented |
F34.1 | Dysthymia (persistent depressive disorder) | Chronic depressive conditions that benefit from longitudinal care management and psychiatric consultation |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
99492 | Initial psychiatric collaborative care management, first 70 minutes in the first calendar month | Used at program initiation; G0504 is reported for additional 30-minute increments beyond primary collaborative care codes |
99493 | Subsequent psychiatric collaborative care management, first 60 minutes in a subsequent month | Represents primary monthly collaborative care; G0504 supplements when additional 30-minute increments are provided |
99494 | Add-on code for each additional 30 minutes in a calendar month of psychiatric collaborative care management | Medicare-era CPT add-on analogous to G0504; documents extra BHCM time beyond the primary service |
96127 | Brief emotional/behavioral assessment (e.g., PHQ-9) with scoring and documentation, per standardized instrument | Used to track symptom severity over time and supports medical necessity for continued collaborative care interventions |
99401 | Preventive medicine counseling and/or risk factor reduction intervention; approximately 15 minutes | Occasionally used for brief targeted counseling when billed separately and appropriately documented alongside collaborative care components |