Summary & Overview
HCPCS A4673: Extension Line with Easy Lock Connectors, Dialysis
HCPCS Level II code A4673 identifies an extension line with easy lock connectors used in dialysis care. This supply item facilitates secure connections between vascular access devices and dialysis equipment, supporting safe and efficient hemodialysis procedures. Nationally, consistent coding for dialysis supplies matters for accurate billing, supply management, and clinical workflow in outpatient dialysis centers and clinics.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for A4673, payer coverage considerations, and typical sites of service where the item is used. The publication outlines benchmarks and policy-relevant points for billing and reimbursement of dialysis supplies, summarizes common modifiers used with supply codes, and highlights operational implications for dialysis providers and billing teams.
The content equips billing managers, clinicians involved in dialysis services, and policy analysts with concise information on code definition, practical application in dialysis settings, and what to expect from major national payers. Data not provided in the input—such as associated taxonomies, specific ICD-10 mappings, and related codes—is noted where applicable.
Billing Code Overview
HCPCS Level II code A4673 describes an extension line with easy lock connectors intended for use with dialysis. The item is a disposable or reusable vascular access extension that connects dialysis tubing or catheters to dialysis equipment, incorporating connectors designed for simplified locking to secure lines during treatment.
Service type: Dialysis supply / vascular access extension
Typical site of service: Dialysis clinic or outpatient dialysis center
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is a person with end-stage renal disease (ESRD) receiving outpatient hemodialysis who requires an ancillary extension line with easy-lock connectors to facilitate safe connection between the dialysis machine blood lines and the patient’s vascular access. The scenario: a dialysis nurse in an outpatient dialysis center prepares the dialysis machine and extracorporeal circuit before a scheduled thrice-weekly hemodialysis session. The patient presents for treatment via a tunneled central venous catheter or arteriovenous graft/fistula. The nurse inspects the vascular access and extracorporeal components, attaches a new sterile A4673 extension line with easy-lock connectors to the machine bloodlines to achieve appropriate length or connector compatibility, primes the circuit with saline, performs standard infection-control techniques, and proceeds with needle or catheter connections. Typical workflow steps include verification of orders, selection and inspection of the A4673 device, use of aseptic technique, securement of connections, equipment setup checks, and documentation of device lot and usage in the dialysis record. Typical sites of service are outpatient dialysis centers and hospital-based dialysis units. Typical clinical indications include routine hemodialysis setup, replacement of damaged or incompatible tubing connectors, or extension to reach patient access during treatment.
Coding Specifications
| Modifier | Description | When to Use |
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