Summary & Overview
CPT 90749: Unlisted Vaccine or Toxoid Procedure
CPT code 90749 designates unlisted vaccine or toxoid procedures when no specific vaccine code applies. It enables reporting for administration of novel, investigational, compounded, or otherwise unclassified vaccines and toxoids, filling a national coding gap for products without established descriptors. Use of 90749 matters because it affects claims processing, medical record documentation, and payer adjudication for emerging or uncommon immunizations.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. These payers approach unlisted vaccine claims with policy frameworks that typically require detailed documentation of the vaccine, route of administration, dosage, and clinical justification; specific coverage and billing guidance vary by payer.
Readers will learn a concise overview of the code’s purpose, typical sites of service, and the administrative context for filing claims with 90749. The publication summarizes common documentation expectations, the role of the code in capturing services lacking specific CPT descriptors, and the implications for claims review and prior authorization workflows. Data not available in the input is noted where applicable. The content is designed for a national audience of policy analysts, billing professionals, and clinical administrators seeking clear context on reporting unlisted vaccine or toxoid procedures.
Billing Code Overview
CPT code 90749 is used to report unlisted vaccine or toxoid procedures when no specific vaccine code exists. This code captures administration of novel, compounded, or otherwise unlisted vaccines or toxoids that do not have an assigned CPT descriptor.
Service Type: Vaccine or toxoid administration (unlisted)
Typical Site of Service: Clinics, physician offices, outpatient settings, and other ambulatory care locations where vaccines are administered
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult or pediatric patient receiving an immunization that does not have a published CPT vaccine or toxoid code. For example, a patient presents to an outpatient clinic or public health department for administration of an investigational, custom-compounded, or newly marketed vaccine/toxoid product not yet assigned a specific CPT code. The clinical workflow begins with review of patient history and vaccine indications, screening for contraindications and prior reactions, obtaining informed consent, and documenting lot number, manufacturer, route, site, and dose. A licensed clinician (e.g., family medicine physician, pediatrician, nurse practitioner, or registered nurse) administers the vaccine intramuscularly or subcutaneously, monitors the patient for immediate adverse reactions for 15–30 minutes, and documents administration details and any counseling provided. Billing uses 90749 for the unlisted vaccine/toxoid procedure; when appropriate, payer-specific modifiers from the allowed set are appended to indicate unusual circumstances (for example, reduced service, discontinued procedure, or course of treatment interruptions). Typical sites of service include outpatient physician offices, community health clinics, school-based clinics, and public health vaccination centers.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier appended (placeholder) | Use when no special modifier applies and payer requires a default two-character modifier; rare in clinical use for . |