HCPCS G2004: Comprehensive 60-Minute Post-Discharge In-Home Visit - OpenPayer

Summary & Overview

HCPCS G2004: Comprehensive 60-Minute Post-Discharge In-Home Visit

HCPCS Level II code G2004 represents a comprehensive, 60-minute in-home visit for a new patient following discharge from an inpatient facility, authorized for use within Medicare-approved CMMI models. The code standardizes billing for intensive post-discharge care delivered in a beneficiary's home, domiciliary, rest home, assisted living, or nursing facility within 90 days of discharge and is capped at nine uses per beneficiary in that window. Nationally, G2004 matters because it supports care transitions, addresses readmission risk, and aligns payment with intensive, in-person post-discharge assessment and management.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find concise benchmarks and policy context for G2004, including national scope of use, payment and utilization considerations under Medicare CMMI models, and clinical scenarios where a 60-minute comprehensive in-home visit is applicable. The publication also outlines common operational implications for providers delivering home-based post-discharge care and notes areas where data was not provided in the input, such as associated taxonomies, ICD-10 diagnoses, and related codes. This summary equips payers, health systems, and clinicians with a national overview of the code's purpose, typical settings, and role in transitional care programs.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG2004HCPCS Level IIpost-dischargehome visittransitional carecare coordinationin-home assessmentCMMI

Billing Code Overview

HCPCS Level II code G2004 describes a comprehensive (60 minutes) in-home visit for a new patient post-discharge. The service is intended for use only within a Medicare-approved CMMI model and must be furnished within 90 days following discharge from an inpatient facility. The code is limited to no more than nine occurrences per beneficiary in the specified post-discharge period.

Service type: Comprehensive post-discharge home visit (60 minutes), new patient

Typical site of service: Beneficiary's home, domiciliary, rest home, assisted living, or nursing facility

Clinical & Coding Specifications

Clinical Context

A Medicare beneficiary is discharged from a hospital after a 5-day admission for decompensated heart failure with volume overload. Within 48 hours of discharge a home health clinician (physician, nurse practitioner, or physician assistant participating in the Medicare CMMI-approved model) schedules a comprehensive in-home visit lasting up to 60 minutes using G2004. The visit occurs in the patient’s private residence and includes a focused history since discharge, review of discharge instructions and medications, medication reconciliation, assessment of weight, vital signs, oxygen saturation, medication adherence, wound or device site inspection if present, home safety evaluation, and coordination of follow-up appointments and durable medical equipment. Documentation includes time spent, clinical findings, patient education provided, barriers to care, and any referrals or orders placed.

Typical workflow:

After hospital discharge the hospital care coordination team notifies the CMMI model care manager.
The care manager assigns an enrolled clinician to perform an in-home comprehensive visit within 90 days of discharge; the first visit commonly occurs within 48–72 hours.
The clinician conducts a 60-minute visit at the beneficiary’s home, domiciliary, assisted living, or nursing facility using G2004 when the beneficiary is a new patient to the program post-discharge.
The clinician documents the time-based service, content of the visit, medication reconciliation, patient education, and care plan; transmits orders/referrals; and schedules subsequent visits (no more than nine total within 90 days post-discharge).

Coding Specifications

HCPCS G2107: Frailty with Advanced Illness in Older Adults

HCPCS-G0666-TEAM-REMOTE-E-M-15-MINS

HCPCS G0666: Team Remote E/M for Established Patient, 15 Minutes

HCPCS-G2147-POSTOPERATIVE-LEG-PAIN-OUTCOME-VASSCORE

HCPCS G2147: Postoperative Leg Pain Outcome Measured by VAS/Numeric Scale

HCPCS-G8942-FUNCTIONAL-OUTCOME-ASSESSMENT-CARE-PLAN

HCPCS G8942: Functional Outcome Assessment with Timely Care Plan

HCPCS-G0138-INTRAVENOUS-CIPAGLUCOSIDASE-ALFA-ATGA-INFUSION

HCPCS G0138: Intravenous Infusion of Cipaglucosidase Alfa-atga

HCPCS-G8587-NO-ANTI-LIPID-TREATMENT-AT-DISCHARGE

HCPCS G8587: No Anti-Lipid Treatment at Discharge

HCPCS-G0104-FLEXIBLE-SIGMOIDOSCOPY-COLORECTAL-SCREENING

HCPCS G0104: Colorectal Cancer Screening, Flexible Sigmoidoscopy

HCPCS-G0032-ANTIPSYCHOTIC-MULTIPLE-PRESCRIPTIONS

HCPCS G0032: Two or More Antipsychotic Prescriptions for Serious Mental Illness

HCPCS-G9662-ESTABLISHED-ASCVD-DIAGNOSIS-PROCEDURE-HISTORY

HCPCS G9662: Previously Diagnosed Clinical ASCVD, Including ASCVD Procedure

HCPCS-G9265-MAINTENANCE-HEMODIALYSIS-CATHETER-ACCESS-90-DAYS

HCPCS G9265: Maintenance Hemodialysis with Catheter Access ≥90 Days

Showing 1–10 of 1996

Modifier	Description	When to Use
`11`	Primary procedure	When `G2004` is the principal service for the encounter and is the primary code billed.
`22`	Increased procedural services	When substantial additional work beyond the typical 60-minute comprehensive visit is required (document rationale).
`52`	Reduced services	When the visit is abbreviated due to patient refusal or early termination but still billed as a reduced service.
`53`	Discontinued procedure	When the visit is started but discontinued for reasons related to patient condition or safety.
`54`	Surgical care only	Not commonly used for `G2004` but applies when only the operative component is billed by a surgeon in the global period (rare).
`55`	Postoperative management only	If another practitioner bills the visit for postoperative management separate from the operative service.
`62`	Two surgeons	Relevant only if two clinicians of different specialties jointly provide portions of care during the visit.
`78`	Return to operating room	Uncommon for this service; used when an unplanned return to the operating room occurs and related inpatient/outpatient visits are billed.
`80`	Assistant at surgery	Rarely applicable; use only when an assistant surgeon is involved and billing separate services.
`23`	Unusual anesthesia	Use when unexpected anesthesia is required during a component of post-discharge care in the home (rare).
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use for applicable APP billing roles when required by payor rules.
`CQ`	Service furnished by a physical therapist assistant under general supervision of a PT	When portions of the visit include PT assistant–provided services billed under model rules.
`QX`	Service furnished under the Medicare FQHC/Non-physician practitioner split-shared rules (modifier for auxiliary personnel)	When billing requires identification of split/shared services as defined by the model or payor.
`QY`	Service furnished under a rural health clinic (RHC) or federally qualified health center (FQHC) that meets program requirements	Use when the visit is furnished by an eligible RHC/FQHC under program rules.

Taxonomy Code	Specialty	Notes
363A00000X	Nurse Practitioner	Common clinician performing comprehensive in-home post-discharge visits under CMMI models.
367500000X	Physician Assistant	Frequently provides in-home post-discharge care and medication reconciliation.
207Q00000X	Family Medicine Physician	Primary care physicians performing home visits for recently discharged patients.
207R00000X	Internal Medicine Physician	Hospitalists transitioning care to outpatient/home-based clinicians.
261QU0200X	Home Health Agency	Agencies that coordinate and furnish in-home comprehensive visits under program arrangements.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I50.33`	Acute on chronic systolic (congestive) heart failure	Common reason for hospital admission and for intensive post-discharge home visits to monitor weight, diuretics, and volume status.
`I50.32`	Chronic systolic (congestive) heart failure	Ongoing heart failure management requiring medication reconciliation and home monitoring after discharge.
`J18.9`	Pneumonia, unspecified organism	Patients discharged after pneumonia often need in-home assessment for oxygen needs, activity tolerance, and medication adherence.
`E11.9`	Type 2 diabetes mellitus without complications	Common comorbidity requiring review of glucose management, medications, and wound risk during home visits.
`M54.5`	Low back pain	Functional assessment, mobility, and home safety evaluation often addressed during a comprehensive visit.
`Z48.812`	Encounter for surgical aftercare following joint replacement	Postoperative in-home visits for wound checks, medication reconciliation, and therapy coordination.
`Z91.120`	Patient nonadherence to medication regimen	Identifies need for education, adherence interventions, and care coordination during post-discharge home visits.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99205`	Office or other outpatient visit for the evaluation and management of a new patient, typically 60–74 minutes of total time spent on the date of the encounter	Can be used in clinic settings for equivalent complexity when the patient is seen as a new outpatient instead of an in-home `G2004` visit.
`99341`	Home visit for the evaluation and management of a new patient, typically 20–30 minutes	Shorter-duration home visit codes that may be used for less-comprehensive post-discharge visits or follow-up visits.
`99347`	Home visit for the evaluation and management of an established patient, typically 30 minutes	Used for subsequent in-home follow-up visits after the initial comprehensive `G2004` visit when the patient is established in the program.
`99495`	Transitional care management services with moderate medical decision complexity, face-to-face within 14 days of discharge	Often billed for transitional care management when program criteria are met; may be performed in coordination with the `G2004` visit depending on payer and model rules.
`99496`	Transitional care management services with high medical decision complexity, face-to-face within 7 days of discharge	Higher-complexity TCM that may overlap with services provided during a `G2004` comprehensive home visit; documentation must support billing of both if permitted.

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