G2105 HCPCS Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

HCPCS G2105: Residency Indicator for Elderly Institutional or SNP Residents

HCPCS Level II code G2105 designates patients aged 66 or older who have resided in institutional special needs plans (SNPs) or in long-term care settings with place-of-service codes 32, 33, 34, 54, or 56 for more than 90 consecutive days during the measurement period. Nationally, this code functions as an eligibility and residence-status marker used in quality measurement, population stratification, and payment workflows for older adults in institutional care.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical and administrative intent, guidance on where the service is typically recorded (long-term care and institutional SNP settings), and context for how the code supports measurement periods that rely on continuous residency. The publication outlines benchmarks and policy-relevant considerations tied to measurement definitions and claims reporting, highlights common modifiers observed with this service indicator, and summarizes implications for payer adjudication and quality reporting.

Data not available in the input for specific ICD-10 mappings, associated taxonomies, related codes, and payer-specific reimbursement rates. The content is national in scope and focuses on code interpretation and administrative use rather than clinical management advice.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG2105HCPCS Level IIlong-term carespecial needs planresidency indicatorquality measurementclaims coding

Billing Code Overview

HCPCS Level II code G2105 indicates a patient who is age 66 or older and who has been in an institutional special needs plan (SNP) or residing in long-term care with place-of-service codes 32, 33, 34, 54, or 56 for more than 90 consecutive days during the measurement period.

Service Type: Long-term institutional residency assessment / eligibility indicator

Typical Site of Service: Long-term care facilities or institutional special needs plan settings

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 66-year-old Medicare beneficiary residing in a long-term care facility for over 90 consecutive days is enrolled in an Institutional Special Needs Plan (SNP). During the annual quality measurement period the member’s residency status must be documented to support use of billing code G2105. Nursing facility staff identify the member as meeting the stay-duration requirement; the facility’s medical director or attending clinician documents the residency start date, place of service (one of facility POS codes 32, 33, 34, 54, or 56), and confirms enrollment in an institutional SNP. The clinical workflow includes: initial verification of enrollment and residency duration by nursing/admin staff; medical record documentation by the clinician confirming continuous institutional residence for >90 days; coding/billing compilation to include G2105 on the claim with appropriate facility POS and any applicable modifiers; and submission to the member’s payor (for example, Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, Medicare) for quality-measure reporting and payment reconciliation.

Coding Specifications

Modifier	Description	When to Use

HCPCS G9651: Psoriasis Assessment Tool Not Documented or Not Meeting Benchmarks

HCPCS-G2204-SCREENING-COLONOSCOPY-AGE-45-85

HCPCS G2204: Screening Colonoscopy for Patients Aged 45–85

HCPCS-G9833-PATIENT-TRANSFER-AFTER-CHEMOTHERAPY-INITIATION

HCPCS G9833: Patient Transfer to Practice After Initiation of Chemotherapy

HCPCS-G6036-IMIPRAMINE-ASSAY

HCPCS G6036: Assay of Imipramine

HCPCS-G9526-PATIENT-NOT-REFERRED-TO-HOSPICE

HCPCS G9526: Patient Not Referred to Hospice Care

HCPCS-G9276-CURRENT-TOBACCO-USER-DOCUMENTATION

HCPCS G9276: Documentation of Current Tobacco Use

HCPCS-G9280-PNEUMOCOCCAL-VACCINE-NOT-ADMINISTERED-BEFORE-DISCHARGE

HCPCS G9280: Pneumococcal Vaccination Not Administered Prior to Discharge

HCPCS-G9542-FILTER-REMOVAL-APPROPRIATENESS-RE-ASSESSMENT-3-MONTHS

HCPCS G9542: Re-assessment of Filter Removal Appropriateness within 3 Months

HCPCS-G0176-ACTIVITY-THERAPY-MENTAL-HEALTH-45-MINUTE-SESSION

HCPCS G0176: Activity Therapy for Mental Health, 45+ Minute Session

HCPCS-G9577-OPIOID-THERAPY-OVER-SIX-WEEKS

HCPCS G9577: Patients Prescribed Opiates Longer Than Six Weeks

Showing 1–10 of 1996

Taxonomy Code	Specialty	Notes
`163W00000X`	Geriatric Medicine	Common specialty documenting long-term care residents and SNP enrollment.
`207Q00000X`	Family Medicine	Frequently provides primary care and continuity in nursing facilities.
`207R00000X`	Internal Medicine	Primary clinicians managing chronic conditions in institutionalized older adults.
`208000000X`	General Practice	Provides on-site care and care coordination in long-term care settings.
`363L00000X`	Nursing Home Medicine (SNF)	Specialists in skilled nursing facility care and documentation of length-of-stay criteria.

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99304`	Initial nursing facility care, typically 20 minutes	Often performed at admission or when establishing care documentation for long-term residents.
`99307`	Subsequent nursing facility care, typically 15 minutes	Used for ongoing management visits during extended institutional stays supporting residency documentation.
`99318`	Nursing facility discharge day management; 30 minutes or more	Used when coordinating discharge from the facility after a prolonged stay counted toward the >90-day requirement.
`99497`	Advance care planning including explanation/consent; first 30 minutes	Performed in long-term care residents for goals-of-care discussions and documented in the chart alongside residency status.
`G0439`	Annual wellness visit for Medicare beneficiaries, subsequent	Preventive or wellness visits performed in institutionalized beneficiaries may coincide with the measurement period and supporting documentation.

`22`	Increased procedural services	Use when additional work beyond the usual descriptor is documented for services related to care coordination in complex long-term care residents.
`23`	Unusual anesthesia	Rarely applicable; used if an unusual anesthesia circumstance is documented during a procedure provided in the facility.
`52`	Reduced services	Use when a planned service is partially reduced or not completed while still documenting the reason in the chart.
`53`	Discontinued procedure	Use when a procedure related to the resident’s care is started but terminated for clinical reasons.
`54`	Surgical care only	Use when the billing covers only the surgical portion of a service provided in the institutional setting.
`55`	Postoperative management only	Use when only postoperative management is furnished in the facility.
`56`	Preoperative management only	Use when only preoperative management is provided onsite.
`62`	Two surgeons	Use when two surgeons are documented as operating together on a resident in the facility.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an eligible nonphysician practitioner assists in a procedure performed in the institutional setting.
`CO`	Cast room services	Use when cast room-specific services are billed separately for a resident in the facility.

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