Summary & Overview
CPT 90611: Combined Smallpox and Monkeypox Vaccine, 0.5 mL
CPT code 90611 denotes a combined smallpox and monkeypox vaccine product supplied as a 0.5 mL subcutaneous dose. This vaccine code is nationally relevant for immunization programs, public health response planning, and payer coverage determinations related to orthopoxvirus prevention. The code identifies the vaccine product itself and is distinct from administration procedure codes.
Key payers included in this overview are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on clinical context and typical care settings, plus guidance on where to look for payer coverage details and billing considerations. The publication summarizes common modifiers and other billing metadata when available, and highlights what information is not provided in the input.
This summary is intended to orient billing staff, clinic managers, and policy analysts to the primary purpose of CPT code 90611, the typical sites where the vaccine is given, and the types of payer coverage to review for reimbursement policies and claims processing.
Billing Code Overview
CPT code 90611 represents a combined smallpox and monkeypox vaccine product administered by subcutaneous injection. The single-dose presentation is 0.5 mL and the code denotes the vaccine product itself rather than the administration procedure.
Service Type: Vaccine administration product
Typical Site of Service: Outpatient clinics, public health clinics, ambulatory care settings, and other medical settings where immunizations are delivered
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 34-year-old public health worker presents to a community immunization clinic for a pre-exposure prophylaxis vaccination against orthopoxviruses. The clinician confirms eligibility, reviews contraindications (including immunosuppression and pregnancy), obtains informed consent, documents patient history and prior vaccinations, and administers a single 0.5 mL subcutaneous injection of the combined smallpox and monkeypox vaccine (90611). Post-vaccination observation for adverse reaction is performed for 15–30 minutes. Documentation includes vaccine lot number, expiration date, site of administration, dose, VIS (Vaccine Information Statement) given, and the patient’s consent and eligibility assessment. Billing is submitted from the ambulatory clinic or public health department with the appropriate vaccine CPT code and any applicable modifier(s).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/Undefined professional requirement | Rarely appended; use per payer rules when no other modifier applies |
33 | Preventive service | Use when vaccine is provided as a preventive service per payer policy |