A4714 Treated Water (HCPCS) Reimbursement

HCPCS Level II code A4714 designates treated water (deionized, distilled, or reverse osmosis) supplied for peritoneal dialysis, measured per gallon. This supply is a routine but clinically essential component of peritoneal dialysis care: water quality influences solution preparation, equipment cleaning, and infection control. Nationally, the coding and billing of water supplies affect dialysis program operations, supply chain management, and expense recognition across payers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of how A4714 is used in billing lines, typical sites of service (home dialysis and outpatient dialysis centers), and the role of treated water in peritoneal dialysis workflows. The publication also summarizes benchmarks and payment considerations where available, highlights relevant policy and coverage themes affecting dialysis supplies, and provides clinical context for why accurate coding matters for patient safety and program compliance.

Data not available in the input is noted where applicable. The content is intended as a national primer on HCPCS Level II code A4714, clarifying its clinical purpose and the areas of billing and policy that commonly intersect with supply billing for peritoneal dialysis.

Billing Code Overview

HCPCS Level II code A4714 describes treated water (deionized, distilled, or reverse osmosis) for peritoneal dialysis, per gallon. The service type is dialysis supply — treated water for peritoneal dialysis. The typical site of service is home dialysis or outpatient dialysis facility, where treated water is used in the preparation and administration of peritoneal dialysis solutions or for device maintenance.

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Clinical Context

A patient with end-stage renal disease (ESRD) manages peritoneal dialysis at home. The dialysis care team orders treated water (deionized, distilled, or reverse osmosis) delivered in gallon containers for dialysate preparation and machine reprocessing. Typical workflow: the nephrology clinic or home dialysis program assesses the patient during routine follow-up or hospital discharge planning, documents the need for treated water for peritoneal dialysis (PD) exchanges or cycler reprocessing, places an order with durable medical supply vendors, and arranges home delivery. Home health nurses or trained caregivers store and use the treated water per manufacturer and dialysis unit protocols, tracing lot numbers and documenting supply use in the patient record. Typical sites of service include the patient’s home and outpatient dialysis clinics that perform PD training and machine maintenance. Patient scenarios include routine home PD supply replenishment, preparation for travel with portable PD supplies, or water replacement after contamination of existing supply.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier	Use when no modifier applies to the item billed.
`22`	Increased procedural services

Taxonomy Code	Specialty	Notes
207RG0300X	Nephrology	Nephrologists direct PD therapy and order dialysis supplies.
251B00000X	Home Health Care	Home health nurses manage PD supplies and patient training.
3336C0002X	Dialysis Facility	Facility staff coordinate supply procurement and inventory for PD patients.
174400000X	Medical Supply Company	Durable medical equipment suppliers deliver treated water and document billing.
207L00000X	Internal Medicine	Hospitalists or internists overseeing ESRD patients arrange supply orders in coordination with nephrology.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N18.6`	End stage renal disease	Primary indication for chronic peritoneal dialysis and need for treated water supplies.
`N18.5`	Chronic kidney disease, stage 5	Severe CKD often managed with PD, requiring dialysis supplies including treated water.
`T82.7XXA`	Infection and inflammatory reaction due to other cardiac and vascular devices, implants and grafts, initial encounter	Included as a potential access-related complication context where sterile supplies and water are critical (note: use only when clinically applicable).
`N99.89`	Other disorders of kidney and ureter in diseases classified elsewhere	Used for related nephrology conditions that may necessitate PD support.
`Z99.2`	Dependence on renal dialysis	Administrative coding to indicate ongoing dialysis dependence, supporting supply coverage.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`90945`	Peritoneal dialysis training and education, initial; patient and/or caregiver training, includes home assessment and instruction	Performed before ongoing home PD; training sessions accompany orders for treated water supplies.
`90947`	Peritoneal dialysis training and education, subsequent; follow-up training and retraining	Ongoing training for supply handling and water use, often billed at follow-up visits.
`90960`	Continuous ambulatory peritoneal dialysis (CAPD), peritoneal dialysate infusion and drainage; requiring manual exchanges performed in hospital or dialysis facility	Clinical PD exchanges that utilize treated water in dialysate preparation or machine reprocessing.
`90963`	Continuous cycler-assisted peritoneal dialysis, peritoneal dialysate infusion and drainage, cycler-assisted	Cycler-based PD that depends on treated water for equipment reprocessing and some solution handling.
`99070`	Supplies and materials (single-use) used directly by the patient, not otherwise classified	Used for billing additional non-covered supplies related to PD when itemized; complements HCPCS `A4714` supply billing.

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Summary & Overview

HCPCS A4714: Treated Water for Peritoneal Dialysis, Per Gallon