Summary & Overview
HCPCS G2166: Neck Functional Status Assessment Not Completed
HCPCS Level II code G2166 documents instances when a patient is unable or unwilling to complete a neck functional status passive range-of-motion assessment at admission or discharge. The code captures situations including patient refusal, cognitive, visual, motor, language, or low-literacy barriers, absence of a suitable proxy or recorder, early self-discharge, or medical contraindication. Accurate use of G2166 matters nationally because it supports clinical documentation, quality measurement, and administrative reporting when standard functional assessments cannot be completed.
Major national payers relevant to this code include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical context, where and when it is used, and typical documentation elements associated with a non-completed neck functional assessment. The publication outlines benchmarks and policy-related considerations that affect billing and reporting for incomplete functional status assessments, clarifies common billing modifiers and payor considerations, and highlights operational implications for facilities that perform admission and discharge functional evaluations.
This summary is written for a national audience and is intended to orient clinical, coding, and administrative staff to the purpose and use cases for G2166, plus what to expect in payer interactions and reporting when neck functional status assessments cannot be completed.
Billing Code Overview
HCPCS Level II code G2166 indicates situations where a patient did not complete a required functional status assessment at admission and/or discharge for reasons related to refusal, cognitive or sensory deficits, language or literacy barriers, lack of a suitable proxy/recorder, early self-discharge, or medical reasons. The description specifies inability to complete the neck functional status passive range of motion (fs prom) at admission or discharge for the listed reasons.
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Service type: Functional status assessment (neck passive range of motion) not completed due to patient-related or situational barriers
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Typical site of service: Inpatient or outpatient clinical settings where functional status assessments are performed, including rehabilitation and acute care facilities
Clinical & Coding Specifications
Clinical Context
A 78-year-old patient admitted to an inpatient rehabilitation facility following a cerebrovascular accident is scheduled for standardized functional status performance measures at admission and discharge. During the initial assessment the patient is unable to complete the neck functional status passive range of motion (fs PROM) due to expressive aphasia and right-sided hemiparesis; no suitable proxy or recorder is available to assist or provide reliable responses. At discharge the patient self-discharges early against medical advice before the discharge fs PROM can be completed. The clinical workflow documents attempts to obtain the measure, reasons for non-completion (cognitive deficit, motor deficit, language barrier, lack of proxy), and applies the HCPCS Level II code G2166 to indicate the measure was not performed for specified reasons. Progress notes, attempted assessment timestamps, and caregiver contact attempts are included in the medical record to support billing and quality reporting requirements.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the clinician documents substantially greater work or complexity related to attempts to obtain the measure (for example extensive communication attempts or interpretation services) but the measure remains uncompleted. |