Summary & Overview
HCPCS Level II J0457: Aztreonam Injection, 100 mg
HCPCS Level II code J0457 designates a 100 mg injection of aztreonam, a monobactam antibiotic used for treating susceptible Gram-negative bacterial infections. Nationally, accurate billing for injectable antimicrobials like aztreonam is important for hospital, outpatient infusion, and emergency department revenue cycles, as well as for antimicrobial stewardship documentation and pharmacy inventory management.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for aztreonam administration, common sites of service where J0457 is billed, and the types of benchmarks and policy considerations typically associated with HCPCS drug codes. The publication also outlines payer coverage patterns, billing considerations such as unitization and infusion-related service lines, and recent policy updates relevant to HCPCS drug coding.
The content is intended to help billing staff, pharmacists, and revenue integrity teams understand where J0457 fits within drug billing workflows and what areas to review for coding accuracy, payer alignment, and documentation consistency.
Billing Code Overview
HCPCS Level II code J0457 represents an injection of aztreonam, 100 mg. This code describes the drug product and unit of service for aztreonam provided as an injectable antimicrobial agent.
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Service type: Intravenous or intramuscular antibiotic administration
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Typical site of service: Hospital inpatient, hospital outpatient, infusion center, emergency department, or other clinical settings where parenteral antibiotics are administered
Clinical & Coding Specifications
Clinical Context
A 58-year-old male with cystic fibrosis presents to an outpatient infusion center with a multidrug-resistant Gram-negative pulmonary exacerbation. Sputum cultures grew Pseudomonas aeruginosa with resistance to many beta-lactams but susceptibility to aztreonam. The pulmonologist orders inhaled and intravenous therapy; the infusion nurse prepares and administers J0457 (injection, aztreonam, 100 mg) diluted per institutional protocol. The clinical workflow includes verification of the drug order and lot, allergy check, aseptic preparation in a sterile hood, dose calculation based on prescribed milligrams, IV line or peripheral access confirmation, administration over the prescribed time, observation for infusion reactions, and documentation of lot number, dose, route, and any adverse events in the electronic medical record. Billing is submitted using the HCPCS Level II code J0457 with appropriate modifier(s) to reflect service circumstances (for example, a modifier for split/shared services, product discarded, or administrative claims circumstances). Typical sites of service include outpatient infusion centers, hospital outpatient departments, emergency departments, and inpatient settings when aztreonam is administered intravenously.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
JW | Drug or biological waste, discarded unused portion |