How to Bill CPT 91301 for Vaccines and Immunization Services

Feb 3, 2026

When to Use CPT Code 91301

CPT 91301 is used for vaccine or immunization-related services, including vaccine administration and vaccine products.

  • Service type: Immunization
  • Components: Vaccine product, administration, or both
  • Who bills it: Physicians, clinics, and qualified healthcare providers

Common scenarios:

  • Routine childhood immunizations
  • Adult vaccine administration
  • Seasonal and preventive vaccinations

Insurance Verification Tips for CPT 91301

  1. Verify coverage under preventive benefits.
  2. Confirm age and vaccine-specific requirements.
  3. Bill administration codes separately when appropriate.
  4. Track lot numbers and documentation requirements.

Example Case of CPT 91301

A provider administers a vaccine as part of preventive care and documents the vaccine details.
The service is billed as one unit of CPT 91301.

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