Summary & Overview
HCPCS Level II J1458: Injection, Galsulfase, 1 mg
HCPCS Level II code J1458 designates the injectable enzyme replacement therapy galsulfase, billed per 1 mg. This code is nationally relevant for specialty drug billing, pharmacy benefit administration, and hospital outpatient and infusion services because galsulfase is used to treat lysosomal storage disorders and typically requires dose-based billing and coordination across payers. Key national payers include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for galsulfase, common sites of service for administration, and the practical billing considerations tied to a per-milligram HCPCS Level II drug code. The publication outlines payer coverage patterns, common claim modifiers and service-line implications where available, and points readers to areas where policy updates or payer-specific medical necessity criteria may affect reimbursement and prior authorization workflows. Data not available in the input is noted where applicable, and the document focuses on national implications rather than state-level variations.
Billing Code Overview
HCPCS Level II code J1458 represents the medication galsulfase, billed per 1 mg of the injectable drug. This code is used for administration of galsulfase, an enzyme replacement therapy supplied as an injection.
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Service type: Injection, enzyme replacement therapy
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Typical site of service: Hospital outpatient department, physician office, or infusion center
Clinical & Coding Specifications
Clinical Context
A typical patient is a pediatric or adult with mucopolysaccharidosis type VI (MPS VI, Maroteaux-Lamy syndrome) who requires regular enzyme replacement therapy with galsulfase. The patient arrives to an outpatient infusion center or hospital infusion clinic for scheduled intravenous administration. Verification steps include confirming the prescription for J1458 (galsulfase, 1 mg), recent weight-based dose calculation, current labs (renal and hepatic function), and documentation of prior infusion tolerance. Nursing prepares the dose under aseptic technique, inspects the product for particulate matter, and administers via peripheral or central IV access over the manufacturer-recommended infusion time with vital sign monitoring and emergency medications available. Typical workflow elements: insurance eligibility and prior authorization confirmation, medication reconciliation, dose verification by pharmacist, informed consent for infusion risks, administration with continuous monitoring for infusion-related reactions, documentation of lot number and units billed as J1458 per milligram, and post-infusion observation prior to discharge to home or routine follow-up visits.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
JW | Drug discarded/not administered to any patient | When part of the prepared vial is discarded and billing policy allows reporting of wasted drug units separately. |