J1931 Laronidase injection
Also known as: laronidase, Aldurazyme
Injection of laronidase. An enzyme replacement therapy for mucopolysaccharidosis type I.
In Plain Language
enzyme replacement therapy; rare genetic disease treatment
Clinical Context
Used for lysosomal storage disease mucopolysaccharidosis type I (MPS-I). Laronidase replaces deficient enzyme alpha-L-iduronidase to reduce substrate accumulation.
RVU Information
CPT J1931 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
J-codes represent drugs administered by a healthcare provider (not self-administered). Documentation must include the drug name, dosage, route of administration, and medical necessity. Most payers require the National Drug Code (NDC) on the claim. Bill the appropriate administration code (96365-96379) in addition to the drug code.
Specialties
Frequently Asked Questions
What is CPT code J1931?
CPT J1931 (Laronidase injection) is a J Codes (Drugs) code. Injection of laronidase. An enzyme replacement therapy for mucopolysaccharidosis type I.
How is J1931 administered?
CPT J1931 is administered by a healthcare provider, typically via injection or infusion. Used for lysosomal storage disease mucopolysaccharidosis type I (MPS-I). Laronidase replaces deficient enzyme alpha-L-iduronidase to reduce substrate accumulation. It is used by Genetics, Pediatrics, Internal Medicine.
When is CPT J1931 used?
Used for lysosomal storage disease mucopolysaccharidosis type I (MPS-I). Laronidase replaces deficient enzyme alpha-L-iduronidase to reduce substrate accumulation.
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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.