Summary & Overview
HCPCS G2110: Frailty with Advanced Illness Identification in Adults 66+
HCPCS Level II code G2110 designates identification of patients aged 66 and older with documented frailty plus concurrent evidence of advanced illness. The measure captures either a single acute inpatient encounter with an advanced illness diagnosis or two separate outpatient/observation/ED/nonacute inpatient encounters with advanced illness diagnoses within the measurement period or the prior year. This code matters nationally because it focuses on high-risk, high-need older adults whose care coordination, palliative needs, and resource utilization often require targeted clinical and policy attention.
Key payers covered in this analysis include Medicare, Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Readers will find an overview of the code's clinical scope, typical sites of service, and the service type it represents. The publication also summarizes expected benchmarks and reporting considerations, highlights relevant policy context for measuring frailty and advanced illness in older adults, and explains clinical implications for case ascertainment and care management workflows. Information on common modifiers, associated taxonomies, ICD-10 mappings, and related billing considerations is presented where available. Data not available in the input is clearly noted where applicable.
Billing Code Overview
HCPCS Level II code G2110 identifies patients 66 years and older who have at least one claim or encounter for frailty during the measurement period and who also have evidence of advanced illness defined as either one acute inpatient encounter with an advanced illness diagnosis or two outpatient/observation/ED/nonacute inpatient encounters on different dates with an advanced illness diagnosis during the measurement period or the year prior.
Service type: Complex patient assessment and case identification tied to frailty and advanced illness diagnoses.
Typical site of service: Acute inpatient settings, outpatient clinics, emergency departments, observation units, and nonacute inpatient facilities.
Clinical & Coding Specifications
Clinical Context
A 78-year-old patient with progressive weight loss, recurrent falls, decreased mobility and documented frailty presents to a primary care clinic. During the measurement period the patient has at least one encounter documenting frailty and, within the same period or the prior year, has either an acute inpatient admission with an advanced illness diagnosis (for example metastatic cancer, end-stage heart failure, or advanced dementia) or two outpatient/observation/emergency department/nonacute inpatient encounters on different dates with an advanced illness diagnosis. The clinical workflow begins with the primary care clinician or geriatrician performing a frailty assessment (e.g., gait speed, unintentional weight loss, exhaustion, grip strength or a validated frailty instrument) and documenting frailty in the medical record. If advanced illness is suspected or known, diagnoses are recorded at the encounter(s). Encounters may include outpatient visits, observation stays, ED visits, or an acute inpatient admission. Coding staff review the chart to assign the HCPCS Level II code G2110 for reporting patients aged 66 and older who meet the documented frailty and advanced illness encounter requirements during the measurement window. Typical sites of service are outpatient primary care clinics, geriatric clinics, emergency departments, observation units, and acute inpatient hospitals. Common clinical team members include the primary care provider, geriatrician, hospitalist, nursing staff, social work, and case management to coordinate care and document encounter diagnoses and frailty status for accurate coding and quality measurement.
Coding Specifications
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