Summary & Overview
HCPCS A4236: Replacement Silver Oxide Battery for Home Glucose Monitor
HCPCS Level II code A4236 represents a replacement silver oxide battery for use with a medically necessary home blood glucose monitor owned by the patient. This supply-level HCPCS code covers a routine consumable component that supports ongoing self-monitoring of blood glucose for patients managing diabetes. Nationally, clear coding of such supplies affects patient access, claims processing, and out-of-pocket expectations for a high-volume chronic condition.
Key payers in the coverage landscape include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what this HCPCS Level II code covers, typical sites of service, and the clinical context for use with home glucose monitoring devices. The publication also summarizes common billing modifiers and related administrative considerations where available, and outlines benchmarks and policy updates relevant to supply coding for diabetes self-management devices.
The content is intended to help billing managers, coders, and policy analysts understand how A4236 is used in practice, what payers commonly consider when adjudicating supply claims, and where to look for payer-specific coverage rules or documentation requirements. Data not available in the input will be noted explicitly in relevant sections.
Billing Code Overview
HCPCS Level II code A4236 describes a replacement silver oxide battery intended for use with a medically necessary home blood glucose monitor owned by the patient, billed per unit (each). The service type is supply of a replacement consumable component for a durable medical device used in home self-monitoring of blood glucose. The typical site of service is the patient's home, where the glucose monitor is owned and operated by the patient.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with diabetes mellitus who owns a medically necessary home blood glucose monitor and requires a replacement silver-oxide battery for continued device operation. The patient contacts a primary care clinic, endocrinology practice, diabetes education program, or durable medical equipment (DME) supplier requesting a single replacement battery when the monitor fails to power on or displays low-battery alerts. The clinician or DME staff verifies device ownership and medical necessity, documents the device model and the clinical indication (e.g., ongoing glucose self-monitoring for insulin management), and dispenses the replacement battery to the patient. Billing uses HCPCS Level II code A4236 billed once per battery supplied. Typical documentation includes patient identifiers, diagnosis supporting use of a home glucose monitor, device ownership confirmation, quantity dispensed, battery type (silver oxide), and date of service. Sites of service commonly include outpatient clinic, physician office, home health visits, and DME supplier storefronts or delivery to patient home.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — standard submission | Use when no special circumstance applies to the supply of the battery. |