Summary & Overview
CPT 4148F: Immunity Vaccine for Hepatitis A
CPT code 4148F denotes that a patient received an immunity vaccine against the hepatitis A virus. As a specific immunization reporting code, it matters nationally for documenting vaccine delivery, supporting quality measurement and public health tracking, and aligning clinical records with payer requirements. Accurate use of this code contributes to population immunization surveillance and helps ensure appropriate claims processing.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of how the code is applied in clinical practice, the typical settings where hepatitis A vaccines are administered, and the role of the code in billing and reporting workflows. The publication summarizes common payer coverage considerations, expected service lines, and where to look for related billing guidance.
This resource is intended for clinicians, billing staff, and policy analysts seeking a practical, national-level reference on CPT code 4148F. It highlights the clinical context of hepatitis A immunization, documentation priorities, and the types of benchmarks and policy updates that commonly affect immunization billing and reporting. Data not available in the input will be clearly noted in applicable sections.
Billing Code Overview
CPT code 4148F indicates that a patient was given an immunity vaccine against the hepatitis A virus. This code is used to document administration of a hepatitis A immunization.
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Service type: Immunization administration (hepatitis A vaccine)
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Typical site of service: Outpatient clinic, primary care office, public health clinic, or other ambulatory care settings
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 28-year-old adult presents to a primary care clinic requesting immunization prior to international travel. The patient has no contraindications to vaccines, reports no severe allergies to vaccine components, and has no history of hepatitis A infection. The clinical workflow includes confirmation of vaccination indication, review of immunization history, screening for contraindications and current illness, obtaining informed consent, administration of the hepatitis A vaccine intramuscularly (typically in the deltoid), documentation of vaccine manufacturer, lot number, injection site, and date in the medical record and immunization registry, and billing for the vaccination using code 4148F. Post-vaccination observation for immediate adverse reactions (usually 15 minutes) is performed and counseling on potential local and systemic reactions and scheduling of a follow-up dose if a two-dose series is required.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day of the procedure | Use when an E/M visit is performed in addition to the vaccine administration and is significant and separate from the immunization visit. |