HCPCS G9511: Index PHQ-9/PHQ-9M Score >9 Documented - OpenPayer

Summary & Overview

HCPCS G9511: Index PHQ-9/PHQ-9M Score >9 Documented

HCPCS Level II code G9511 represents documentation that an index event PHQ-9 or PHQ-9M score exceeded 9 during the twelve-month denominator identification period, signaling clinically significant depressive symptoms. Nationally, standardized capture of elevated PHQ scores is important for quality measurement, care coordination, and population health tracking for depression screening and follow-up.

This publication covers coverage and coding considerations for major national payers, including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical intent and service context, a review of payer coverage patterns where available, and guidance on where this code fits within quality measurement workflows.

The report provides benchmarks and policy-relevant context for clinicians and billing professionals: how G9511 is used to identify patients with elevated depressive symptom burden, where it typically appears in the medical record, and implications for care management and quality programs. Data not available in the input for specific modifiers, taxonomies, ICD-10 pairings, or payer-specific reimbursement rates is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG9511HCPCS Level IIdepression screeningPHQ-9behavioral healthquality measurementoutpatientmental health metrics

Billing Code Overview

HCPCS Level II code G9511 documents an index event PHQ-9 or PHQ-9M score greater than 9 recorded during the twelve-month denominator identification period. This code indicates that a patient screened positive for moderate to severe depressive symptoms based on the Patient Health Questionnaire instruments during the measurement year.

Service type: Mental health screening result documentation
Typical site of service: Outpatient behavioral health or primary care clinics where depression screening is performed

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 48-year-old primary care patient attends a scheduled follow-up visit for ongoing management of major depressive disorder and anxiety. During the twelve-month denominator identification period the clinic documents an index event date when the patient completed a PHQ-9 screening instrument and the total score is greater than 9, triggering the measure identified by billing code G9511. The workflow begins with medical assistant intake where the PHQ-9 (or PHQ-9M) is administered and scored. The score is entered into the electronic health record and flagged for clinician review. The clinician reviews the score, documents the index event date and the score in the chart, assesses risk (including suicide risk), and documents a treatment plan or follow-up plan in the same twelve-month period. Behavioral health integration or referral to mental health services may occur during the visit. Billing staff assign G9511 when the numerator criteria (index event date with PHQ-9/PHQ-9M score >9 documented within the twelve-month denominator) are met and include any appropriate modifiers for payer-specific circumstances.

Coding Specifications

Modifier	Description	When to Use

HCPCS G9062: Oncology Management Differing from Guidelines

HCPCS-G9978-REMOTE-IN-HOME-NEW-PATIENT-EVALUATION-E-AND-M

HCPCS G9978: Remote In-Home New Patient Evaluation and Management

HCPCS-G9057-ONCOLOGY-GUIDELINE-DEVIATION-CLINICAL-TRIAL

HCPCS G9057: Oncology Guideline Deviation for Clinical Trial Enrollment

HCPCS-G0106-COLORECTAL-CANCER-SCREENING-ALTERNATIVE-SIGMOIDOSCOPY-BARIUM-ENEMA

HCPCS G0106: Colorectal Cancer Screening, Imaging Alternative

HCPCS-G9986-REMOTE-IN-HOME-EVALUATION-MANAGEMENT-ESTABLISHED-PATIENT

HCPCS G9986: Remote In-Home Evaluation and Management for Established Patients

HCPCS-G8492-PERIOPERATIVE-CARE-MEASURES-REPORTING-INTENT

HCPCS G8492: Intent to Report Perioperative Care Measures

HCPCS-G2167-NECK-IMPAIRMENT-RESIDUAL-SCORE-NEGATIVE

HCPCS G2167: Neck Impairment Residual Score (< 0)

HCPCS-G9405-POST-DISCHARGE-FOLLOW-UP-WITHIN-7-DAYS

HCPCS G9405: Post-Discharge Follow-Up Within 7 Days

HCPCS-G8496-PREVENTIVE-CARE-MEASURES-COMPLETE

HCPCS G8496: Completion of Preventive Care Measures

HCPCS-G2117-FRAILTY-ADVANCED-ILLNESS-PATIENT-IDENTIFICATION

HCPCS G2117: Frailty with Advanced Illness Patient Identification

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Taxonomy Code	Specialty	Notes
`207Q00000X`	Family Medicine	Primary setting where `PHQ-9` screening and documentation for `G9511` commonly occurs.
`207R00000X`	Internal Medicine	Adult primary care clinicians who perform routine depression screening and documentation.
`363L00000X`	Psychiatry & Neurology	Psychiatrists who evaluate and document `PHQ-9` scores and treatment planning.
`367A00000X`	Clinical Social Worker	Behavioral health clinicians who may administer or interpret the `PHQ-9` and document the index event.
`363LP0801X`	Consultation-Liaison Psychiatry	Specialists involved when complex medical comorbidity requires psychiatric input and formal documentation.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`F32.1`	Major depressive disorder, single episode, moderate	Common indication when a `PHQ-9` score is >9 and supports diagnostic and treatment documentation.
`F33.1`	Major depressive disorder, recurrent, moderate	Applicable for recurrent depressive presentations where screening informs ongoing management.
`F41.1`	Generalized anxiety disorder	Frequently co-occurs with depressive symptoms and is relevant when `PHQ-9` is used in assessment.
`F32.9`	Major depressive disorder, single episode, unspecified	Used when depressive disorder is identified but not fully specified; `PHQ-9` contributes to clinical characterization.
`Z13.89`	Encounter for screening for other specified mental disorders	Administrative code used when documenting that a screening instrument like `PHQ-9` was performed.
`R45.851`	Suicidal ideation	Critical to document if `PHQ-9` responses indicate suicidal thoughts; directs safety planning and urgent interventions.
`F34.1`	Dysthymia (persistent depressive disorder)	Chronic depressive conditions monitored with periodic `PHQ-9` assessments.

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 E/M code used when clinician reviews `PHQ-9` results, performs risk assessment, and documents treatment plan for the same visit.
`99420`	Administration and interpretation of health risk assessment instrument (per standardized instrument)	May be used when additional structured administration and interpretation services beyond routine screening are billed, depending on payer rules.
`96127`	Brief emotional/behavioral assessment (e.g., depression inventory), single standardized instrument	Frequently used for brief screening administration of instruments like the `PHQ-9` when a separately billable screening code is allowed.
`90834`	Psychotherapy, 45 minutes with patient when performed; typically by a mental health professional	Used when psychotherapy is provided in the same encounter after a positive `PHQ-9` and documented separately.
`99406`	Smoking and tobacco use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	Example of an ancillary preventive counseling code often performed alongside behavioral health screening and intervention planning.

`22`	Increased procedural services	Use when the services provided required substantially greater resources than typically required for the service documented with `G9511`.
`23`	Unusual anesthesia	Use when general anesthesia was medically necessary and unrelated to the typical administration of the screening process.
`52`	Reduced services	Use when the documented service was partially reduced or eliminated at the physician's discretion.
`53`	Discontinued procedure	Use when the screening encounter was started but discontinued, with documentation supporting why the `PHQ-9` administration could not be completed.
`62`	Two surgeons	Use when two clinicians of different specialties shared responsibility for the visit services during a complex behavioral health encounter.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for Medicare beneficiaries	Use when a qualifying advanced practice clinician furnishes the service under an approved employer-based model or specific Medicare rules.
`CQ`	Services furnished by a hospice provider	Use when the patient is enrolled in hospice and the screening is furnished as part of hospice care.
`QK`	Medical direction of two, three, or four qualified health care professionals by a physician	Use when physician direction of multiple clinicians occurred during the episode in which the screening was documented.
`QX`	CRNA service with medical direction by a physician	Use in rare circumstances where anesthesia services for the visit are furnished by a CRNA under direction.
`QY`	Medical direction of one CRNA by an anesthesiologist	Use where relevant anesthesia direction accompanies the documented visit.

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