G8717 HCPCS: Reimbursement & Policy Benchmarks

HCPCS Level II code G8717 denotes a dialysis adequacy finding: single-pool urea clearance to volume ratio (Kt/V) less than 1.2, with no reason specified. Nationally, this code flags suboptimal dialysis clearance, a clinical metric tied to patient outcomes and quality monitoring in end-stage renal disease care. Tracking use of this code informs quality programs, clinical audits, and payer coverage discussions around dialysis adequacy.

Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what the code represents, the likely clinical and operational contexts in which it appears, and the types of analyses and benchmarks typically associated with such measures. The publication outlines common benchmarking goals for dialysis adequacy, implications for quality reporting, and how this code integrates into service-line documentation and claims workflows.

This summary is intended for a national audience of clinicians, billing professionals, and policy analysts. It clarifies the code’s clinical meaning, typical site of service, and the role the code plays in monitoring dialysis treatment effectiveness. Data not available in the input is noted where relevant.

Billing Code Overview

HCPCS Level II code G8717 indicates a measurement of single-pool clearance of urea (Kt) divided by volume (V) with a value less than 1.2, where the reason is not given. This describes a dialysis adequacy metric used to assess the effectiveness of a dialysis session.

Service type: Measurement/assessment related to dialysis adequacy (laboratory/clinical parameter analysis)
Typical site of service: Outpatient dialysis unit or dialysis laboratory setting

Data not available in the input.

Clinical Context

A patient receiving maintenance hemodialysis is evaluated using single-pool urea kinetic modeling to assess dialysis adequacy. The billing code G8717 denotes a measured single-pool Kt/V (single-pool clearance of urea [Kt] / volume [V]) value that is less than 1.2, with the reason not specified. A typical scenario: a 62-year-old patient with end-stage renal disease on thrice-weekly in-center hemodialysis attends a monthly adequacy assessment. Pre- and post-dialysis blood urea nitrogen (BUN) values are obtained by the dialysis nurse or technician; treatment time, ultrafiltration volume, and dialyzer type are documented. The dialysis clinician or nephrology provider calculates single-pool Kt/V using the standard formula or dialysis machine software. When the calculated Kt/V is <1.2, the result is recorded and billed using G8717 to indicate inadequate single-pool dialysis clearance. Typical workflow steps:

Patient arrives for a scheduled in-center hemodialysis session.
Pre-dialysis vitals and blood sample for BUN are collected.
Hemodialysis session proceeds; treatment time and settings are documented in the flow sheet.
Post-dialysis BUN sample is drawn at the appropriate time and entered into the laboratory system.
Dialysis staff or nephrologist calculates single-pool Kt/V and documents the value and any immediate clinical actions (e.g., increased treatment time, dialyzer change) in the medical record.
Billing staff assign G8717 when the single-pool result is <1.2 and no reason for low clearance is specified in coded fields.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure	Use when the nephrologist provides a distinct E/M visit on the same day as adequacy measurement.

26 | Professional component | Use when reporting only the professional component of a service (interpretation or professional oversight) for the adequacy assessment.

59 | Distinct procedural service | Use when the Kt/V measurement is a distinct service separate from another billed dialysis-related procedure.

76 | Repeat procedure or service by same physician | Use when the adequacy measurement is repeated on the same day by the same provider.

77 | Repeat procedure or service by another physician | Use when another provider repeats the Kt/V measurement on the same day.

91 | Repeat clinical diagnostic laboratory test | Use when the lab measurement (e.g., post-dialysis BUN) is repeated to confirm a low Kt/V result.

99 | Multiple modifiers (placeholder for non-standard use) | Rarely used; consult payer-specific guidance before appending multiple modifiers when needed.

GZ | Item or service expected to be denied as not reasonable and necessary (no ABN on file) | Use per payer rules when the service may be considered not reasonable and necessary and no Advanced Beneficiary Notice exists.

GA | Waiver of liability statement issued as required by payer policy | Use when an Advanced Beneficiary Notice is issued and signed.

TC | Technical component | Use when reporting only the technical component of a test (lab processing) separate from professional interpretation.

Taxonomy Code	Specialty	Notes
`207RP0000X`	Nephrology	Nephrologists interpret dialysis adequacy, adjust prescriptions, and oversee dialysis programs.

1744N0002X | Dialysis Facility | Facility taxonomy for outpatient dialysis programs where Kt/V measurements are routinely performed.

363L00000X | Registered Nurse | Dialysis RNs perform specimen collection, treatment documentation, and routine adequacy calculations.

367500000X | Clinical Laboratory | Laboratories that process BUN measurements and other chemistry tests required for Kt/V calculation.

208000000X | Internal Medicine | Hospital- or clinic-based internists with outpatient nephrology management may document and order adequacy testing.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N18.6`	End stage renal disease	Primary population receiving maintenance hemodialysis and routinely assessed for dialysis adequacy using single-pool `Kt/V`.

N18.5 | Chronic kidney disease, stage 5 | Patients approaching or on dialysis where adequacy measures such as Kt/V guide therapy.

Z99.2 | Dependence on renal dialysis | Administrative code frequently present in dialysis encounters; indicates ongoing dialysis dependence and relevance for adequacy monitoring.

I12.0 | Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease | Common comorbidity in dialysis patients affecting treatment planning and adequacy considerations.

E87.2 | Acidosis | Metabolic derangements like acidosis may be related to inadequate dialysis clearance reflected in low Kt/V.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`82040`	Albumin; quantitative, serum or plasma	Often ordered alongside adequacy labs to assess nutritional status that can affect dialysis dosing.

80048 | Basic metabolic panel (Calcium, total; Carbon dioxide; Chloride; Creatinine; Glucose; Potassium; Sodium; Urea nitrogen [BUN]) | Includes BUN and creatinine lab elements used in adequacy assessment and clinical management.

90935 | Hemodialysis procedure with single evaluation by a physician or other qualified health care professional, per day | Represents the billed dialysis treatment session during which single-pool Kt/V is measured; relates as the primary service providing the treatment data.

90937 | Hemodialysis procedure requiring repeated evaluation(s) with/without substantial revision in dialysis prescription | Used when dialysis prescription is adjusted following a low Kt/V result requiring additional physician involvement.

86900 | Antibody; presence by agglutination technique (e.g., hepatitis B surface antibody) | Example of routine periodic testing performed in dialysis populations; not directly part of Kt/V but commonly billed in the same care episode.

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Summary & Overview

HCPCS G8717: Single-Pool Urea Kt/V <1.2, Reason Not Given