Summary & Overview
HCPCS Level II A4220: Refill Kit for Implantable Infusion Pump
HCPCS Level II code A4220 denotes a refill kit for implantable infusion pumps — a disposable supply used during pump reservoir refill procedures. Nationally, this code matters because implantable infusion pumps are used for chronic pain management, spasticity treatment, and targeted delivery of specialty medications; standardized supply coding facilitates consistent billing, inventory tracking, and payer coverage determinations across settings.
Key payers in this review include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise outline of the code’s clinical context and typical sites of service, along with coverage considerations and common modifiers used in claims processing. The publication summarizes payer coverage patterns, billing benchmarks where available, and policy considerations that affect reimbursement for pump refill supplies.
The piece also highlights regulatory and documentation elements relevant to claims — including the linkage between supply codes and the associated clinical procedure — and points readers to where further guidance and payer-specific policies may be found. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code A4220 describes a refill kit for an implantable infusion pump. This item is supplied to enable refill procedures for implantable infusion pumps used to deliver medications such as analgesics, chemotherapy agents, or other continuous infusion therapies.
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Service type: Supply for pump refill procedure
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Typical site of service: Ambulatory surgery center, hospital outpatient department, physician office, or other outpatient infusion settings
Clinical & Coding Specifications
Clinical Context
A 56-year-old patient with a history of chronic malignant pain managed with an implanted intrathecal infusion pump presents for a scheduled refill of the pump reservoir. The patient arrives at an ambulatory surgical center or outpatient clinic specializing in pain management. Pre-procedure verification confirms implant model, last refill date, current pump reservoir volume via interrogation of the pump programmer, and current analgesic concentration (e.g., morphine or baclofen). Informed consent is obtained, vital signs are recorded, and sterile technique is established. Under fluoroscopic guidance or using palpation of the pump access port, a specially sized refill kit is used to access the reservoir with a non-coring needle; medication is withdrawn if necessary and the reservoir is refilled with the prescribed drug and concentration. Post-refill pump function is checked with the programmer, the puncture site is dressed, and the patient is observed for immediate adverse events prior to discharge. Typical sites of service include outpatient clinic, ambulatory surgical center, or hospital outpatient department.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier (standard) | Use when no special circumstances apply and service is billed as usual |
22 |