Summary & Overview
HCPCS G8931: Assessment of Depression Severity Not Documented
HCPCS Level II code G8931 flags instances where an expected assessment of depression severity is not documented and no reason is provided. This administrative code is important nationally because it signals gaps in documentation that can affect quality reporting, care continuity, and payer adjudication for behavioral health services. Proper use of the code helps identify records needing chart completion or follow-up and supports audits of depression screening practices.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what G8931 represents, how it fits into behavioral health documentation workflows, and the implications for billing and quality measurement. The publication covers typical sites of service and service type, benchmarks where available, and relevant policy context that influences how payers and providers handle undocumented assessments. Where input data is not provided, the text notes that information is unavailable. The goal is to give clinicians, coders, and compliance officers a clear national-level overview of G8931, common operational impacts, and the documentation considerations tied to depression severity assessment coding.
Billing Code Overview
HCPCS Level II code G8931 indicates Assessment of depression severity not documented, reason not given. This code is used to denote that a depression severity assessment was expected but the documentation of that assessment is absent, with no reason provided for the omission.
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Service type: Documentation/clinical assessment coding related to behavioral health screening and severity assessment
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Typical site of service: Outpatient clinical settings where depression screening and severity assessments are performed, including primary care clinics and behavioral health outpatient visits
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Clinical & Coding Specifications
Clinical Context
A primary care patient presents for a routine follow-up visit and screens positive on a standardized depression screening tool (for example, PHQ-9). The clinician documents the presence of depressive symptoms but does not record a formal assessment of depression severity or a reason for why severity was not documented. The workflow commonly begins with patient intake screening, clinician review of screening results, and diagnostic assessment. In this scenario, the visit includes history review, medication reconciliation, and plan of care discussion, but the required documentation elements for a formal depression severity assessment (score, interpretation, or rationale for omission) are missing. Billing staff capture the encounter using HCPCS Level II code G8931 to indicate that an assessment of depression severity was not documented and no reason was given. Typical sites of service include outpatient primary care clinics, behavioral health integration settings within medical offices, and community health centers where depression screening is routinely performed during ambulatory visits. The typical patient is an adult with new or ongoing depressive symptoms, often managed in primary care with or without referral to specialty mental health services.
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 |