Summary & Overview
HCPCS J1566: Intravenous Immune Globulin, Lyophilized 500 mg
HCPCS Level II code J1566 represents intravenous immune globulin in a lyophilized (powder) form, billed per 500 mg. This code is used nationwide for administration of immune globulin therapies in acute and chronic immunologic conditions where intravenous replacement or immunomodulation is required. Accurate use of this code affects clinical documentation, billing consistency, and payment integrity for infusion services across care settings. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for immune globulin infusions, common sites of service, and which stakeholders typically manage coverage and payment. The publication reviews national benchmarking topics such as typical utilization units, common billing considerations, and payer policy themes. It also outlines relevant coding practice points, where available, and highlights areas where payers may differ on coverage criteria or documentation expectations. Data not available in the input is noted where applicable. This summary is intended to support billing managers, revenue cycle staff, and clinical leaders who oversee infusion therapies and reimbursement workflows.
Billing Code Overview
HCPCS Level II code J1566 describes an intravenous immune globulin (lyophilized powder) formulation, billed per 500 mg unit. The service type is intravenous infusion of immune globulin, typically administered in hospital outpatient infusion centers, physician office infusion suites, or ambulatory infusion centers. Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a primary immunodeficiency or an autoimmune disorder admitted to an infusion center or hospital for intravenous immune globulin therapy. The clinician reconstitutes J1566 (lyophilized IVIG, 500 mg vial) in the pharmacy or clean room and delivers to the infusion nurse. The nurse verifies patient identity, baseline vital signs, and premedication orders, initiates IV access, programs the infusion pump per product and patient weight, and monitors for infusion-related reactions. Pharmacy documents lot number and expiration on the medication administration record. Billing captures the number of J1566 units administered, any applicable site-of-service modifiers for outpatient clinic vs hospital outpatient department, and procedure-level modifiers for circumstances such as infusion interruption or unusual complexity. Typical sites of service are outpatient infusion centers, hospital outpatient departments, and inpatient settings when IVIG is administered under a physician’s order.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
JW | Drug amount discarded/not administered | When portions of reconstituted IVIG are discarded after preparation and documentation supports waste |