Summary & Overview
CPT 90644: Infant Meningococcal and Hib Combination Vaccine, IM
CPT code 90644 denotes intramuscular administration of a combination vaccine targeting meningococcus and Haemophilus influenzae type B in infants aged 6 weeks to 18 months as part of a multi-dose immunization schedule. This code is nationally relevant because infant meningitis prevention is a core public health priority and routine pediatric immunization drives substantial outpatient vaccine delivery and billing activity across payers. Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find clinical context for the vaccine's use in early childhood, typical sites of service such as pediatric and primary care clinics, and operational considerations for billing this vaccine administration code. The publication presents national benchmarks and payer coverage patterns where available, highlights applicable billing modifiers and common administrative notes, and summarizes policy or coverage updates that affect reimbursement and documentation practices. The content is designed to support billing staff, practice managers, and policy analysts seeking a concise reference on coding, coverage, and the role of this vaccine in pediatric preventive care.
Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, and related codes.
Billing Code Overview
CPT code 90644 describes administration of a combination vaccine that protects against specific strains of meningococcus and Haemophilus influenzae type B. The vaccine is given by intramuscular injection to an infant between 6 weeks and 18 months of age as part of a multiple-dose schedule.
Service Type: Vaccine administration (pediatric, intramuscular), combination meningococcal/Haemophilus influenzae type B immunization
Typical Site of Service: Pediatric clinic, primary care office, or outpatient immunization clinic
Clinical & Coding Specifications
Clinical Context
An infant aged between 6 weeks and 18 months presents to a pediatric outpatient clinic for routine immunizations as part of the standard childhood immunization schedule. The provider reviews the infant's immunization record, verifies age-appropriate indications, obtains parental consent, assesses for contraindications (e.g., history of severe allergic reaction to a prior dose or vaccine component), and documents current health status. The vaccine combination protecting against meningococcal serogroups and Haemophilus influenzae type b is prepared according to manufacturer guidance and aseptically administered via intramuscular injection (typically into the anterolateral thigh) as one dose in a multi-dose series. The clinic documents lot number, expiration date, site of administration, vaccine name and CVX code, informed consent, and any immediate adverse reaction. Post-vaccination observation is performed per clinic protocol. Billing is submitted using 90644 for the vaccine administration event; the encounter may include separate billing for the administration if required by payer rules and documented accordingly.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/No modifier | Used when no specific modifier applies to the service. |