Summary & Overview

HCPCS G8651: Hip Impairment Residual Score Recorded

HCPCS Level II code G8651 denotes a documented residual score for hip impairment that was successfully calculated and found to be zero or greater. The code captures the completion and recording of a quantitative hip impairment assessment used in clinical follow-up, functional status tracking, and outcomes reporting. Nationally, standardized impairment scoring supports care continuity, rehabilitation planning, and quality measurement across outpatient and post-acute settings.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical purpose, typical service setting, and the role such assessments play in documentation and quality reporting. The publication outlines common modifiers and payer considerations when available, highlights how the code fits into service lines involving musculoskeletal evaluation and rehabilitation, and summarizes what is and is not available in the input data for benchmarking and coding crosswalks.

This resource is intended for coding professionals, clinical documentation specialists, and payers seeking a national-level reference for the use and administrative context of G8651. Data not available in the input is noted where relevant.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareG8651HCPCS Level IIhip impairmentfunctional assessmentrehabilitationoutpatient servicesclinical documentationimpairment scoringquality measurement

Billing Code Overview

HCPCS Level II code G8651 indicates that a residual score for hip impairment was successfully calculated and the score was equal to zero (0) or greater than zero (> 0). This represents documentation that a quantitative assessment of hip impairment was completed and recorded with a non-negative result.

Service Type: Assessment/Functional Impairment Scoring

Typical Site of Service: Outpatient clinical settings or rehabilitation facilities where functional impairment scoring and outcome measurement for the hip are performed.

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient presents to an orthopedic clinic for follow-up after total hip arthroplasty. The clinician performs a standardized hip impairment assessment, calculates a validated residual impairment score, and documents the final residual score as part of the post-operative functional assessment. The score is successfully calculated and documented as either zero (0) indicating no residual impairment or greater than zero (> 0) indicating some residual impairment. Typical workflow: history and focused physical exam, standardized functional measurements and scoring (gait, range of motion, pain with activity), calculation of the residual hip impairment score, documentation in the medical record, and billing the appropriate HCPCS Level II code G8651 to indicate the residual score was successfully calculated and recorded.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when documentation supports substantially greater work than typical for calculation and reporting tasks associated with impairment scoring.
`23`	Unusual anesthesia	Rare for this outpatient scoring service; only when general anesthesia was required for the visit and affects reporting.
`52`	Reduced services	Use when the impairment scoring was partially completed and a reduced service was provided.
`53`	Discontinued procedure	Use if the assessment was started but discontinued due to patient instability or other documented reason.
`54`	Surgical care only	Use when only the surgical portion was billed by the surgeon and postoperative impairment scoring billed separately.
`55`	Postoperative management only	Use when only the postoperative evaluation and impairment scoring are billed separate from the operation.
`56`	Preoperative management only	Use when only the preoperative assessment and impairment scoring are billed separate from the operation.
`62`	Two surgeons	Use when two surgeons of different specialties jointly contributed to evaluation and scoring and documentation supports shared work.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery	Use when an advanced practitioner assists surgically and separate reporting for impairment scoring is required by facility rules.
`QX`	CRNA with anesthesiologist direction	Use when anesthesia involvement affects billing and reporting of perioperative impairment scoring services.

Taxonomy Code	Specialty	Notes
`208800000X`	Orthopaedic Surgery	Primary specialty performing hip impairment assessments and post-operative scoring.
`2086S0102X`	Physical Medicine & Rehabilitation	Performs functional assessments and impairment scoring in complex cases.
`207L00000X`	Physical Therapist	Conducts functional measurements and documents scores for impairment evaluations.
`3336D0006X`	Occupational Therapist	May perform activity-based assessments contributing to residual impairment score.
`2084P0800X`	Sports Medicine	Evaluates functional outcomes and documents impairment scores in active patients.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M25.551`	Pain in right hip	Common indication for hip impairment assessment and post-operative follow-up.
`M25.552`	Pain in left hip	Common indication for hip impairment assessment and post-operative follow-up.
`M16.11`	Unilateral primary osteoarthritis, right hip	A frequent diagnosis leading to hip arthroplasty and subsequent residual impairment scoring.
`M16.12`	Unilateral primary osteoarthritis, left hip	A frequent diagnosis leading to hip arthroplasty and subsequent residual impairment scoring.
`M16.9`	Osteoarthritis of hip, unspecified	Used when laterality or specific subtype is not specified but impairment scoring is indicated.
`S72.001A`	Fracture of unspecified part of neck of right femur, initial encounter for closed fracture	Post-fracture patients often receive impairment scoring during recovery.
`S72.002A`	Fracture of unspecified part of neck of left femur, initial encounter for closed fracture	Post-fracture patients often receive impairment scoring during recovery.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`97001`	Physical therapy evaluation	Often performed before or concurrent with functional scoring to establish baseline and document impairments.
`97110`	Therapeutic exercises to develop strength and endurance	Used during treatment visits informed by impairment scoring; documents rehabilitative services following scoring.
`97032`	Electrical stimulation (manual), each 15 minutes	Ancillary therapy that may be part of the treatment plan after impairment assessment.
`99214`	Office or other outpatient visit, established patient, moderate complexity	Common visit code for follow-up evaluation during which the hip residual score is calculated and documented.
`99455`	Work related or medical disability examination, by physician or other qualified health care professional; duration not specified here	Used when impairment scoring is part of a disability evaluation or work-related impairment determination.