A4690 Dialyzer, each
Also known as: dialysis membrane, artificial kidney, filter cartridge
A dialyzer (also called dialysis membrane) is the synthetic or biologic membrane through which blood is filtered during hemodialysis, removing uremic toxins and excess fluid.
In Plain Language
artificial kidney filter; blood cleaning filter
Clinical Context
Used once per hemodialysis session, then discarded. Available in various surface areas and membrane materials. Critical component determining dialysis efficiency.
RVU Information
CPT A4690 does not have a physician work RVU assigned by CMS. This is typical for supply, drug, and equipment codes — reimbursement is based on Average Sales Price (ASP), fee schedules, or payer contracts rather than the RVU system.
Billing & Documentation
HCPCS A-codes cover medical supplies, equipment, and transport services. Documentation must establish medical necessity and include a physician order. For durable medical equipment (DME), a Certificate of Medical Necessity (CMN) or detailed written order may be required.
Specialties
Frequently Asked Questions
What is CPT code A4690?
CPT A4690 (Dialyzer, each) is a A Codes code. A dialyzer (also called dialysis membrane) is the synthetic or biologic membrane through which blood is filtered during hemodialysis, removing uremic toxins and excess fluid.
Does Medicare cover A4690?
Medicare coverage for A4690 depends on medical necessity and applicable Local Coverage Determinations (LCDs). Used once per hemodialysis session, then discarded. Available in various surface areas and membrane materials. Critical component determining dialysis efficiency. A physician order is typically required.
When is CPT A4690 used?
Used once per hemodialysis session, then discarded. Available in various surface areas and membrane materials. Critical component determining dialysis efficiency.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.