Summary & Overview
HCPCS Level II A4230: Infusion Set for External Insulin Pump, Non-Needle Cannula
HCPCS Level II code A4230 identifies a non-needle cannula infusion set used with external insulin pumps, a common supply in ambulatory diabetes management. Nationally, this code matters because it represents a recurring supply line for patients on continuous subcutaneous insulin infusion, affecting procurement, coverage policy, and supply-chain considerations across payers and suppliers. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Readers will gain a concise understanding of the code’s clinical role and billing context, payer coverage landscape, and how A4230 relates to other insulin pump supplies. The publication provides: benchmarks for supply categorization and typical sites of service; clarification of the code’s place within durable medical equipment supply billing; and a clinical context that links the item to ongoing insulin therapy. Absent state-specific policy detail, the discussion is framed for a national audience. Where input information is incomplete, the report notes "Data not available in the input." The content avoids clinical recommendations and focuses on factual description, payer inclusion, and coding relationships to help coding, billing, and policy stakeholders interpret A4230 in routine DMEPOS supply workflows.
Billing Code Overview
HCPCS Level II code A4230 describes an infusion set for an external insulin pump, non-needle cannula type. This item is classified as Durable Medical Equipment (Supply) and is typically provided through a durable medical equipment supplier (DMEPOS).
Clinical & Coding Specifications
Clinical Context
A 32-year-old patient with type 1 diabetes mellitus presents for outpatient durable medical equipment supply services to receive infusion sets for their external insulin pump. The patient is established on continuous subcutaneous insulin infusion and requires routine replacement of the infusion set (non-needle cannula type) every 2–3 days or per manufacturer guidance. The clinical workflow includes verification of medical necessity by an Endocrinology or Primary Care clinician, selection of the appropriate infusion set, documentation of the prescription and quantity, and dispensing from a durable medical equipment supplier (DMEPOS). Billing uses HCPCS Level II code A4230 for the infusion set; common supply modifiers (e.g., NU, RR) are appended as applicable. Typical encounters include review of current insulin use (e.g., Z79.4), assessment of glycemic control, and patient education on insertion, site rotation, and troubleshooting of the external insulin pump infusion set.
Coding Specifications
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Modifiers:
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NU: Indicates New Equipment when the infusion set is provided as new to the patient. Use this modifier when initial issue of the DME supply is furnished. -
RR: Indicates Rental when the item is furnished as a rental. Use this modifier when the supplier is billing for rental of the equipment rather than purchase.