Need help choosing the right code?
Ask CasePilot about procedures, modifiers, bundling, and coding guidance.
Try CasePilot© Copyright 2026 American Medical Association. All rights reserved.
The CPT® Code 90378 refers to a specific immunizing agent known as the respiratory syncytial virus (RSV) monoclonal antibody, which is a recombinant product intended for intramuscular use. This monoclonal antibody is designed to provide passive immunity against RSV, a virus that can cause severe respiratory infections, particularly in infants and young children. The antibody works by neutralizing the virus, thereby helping to prevent infection in high-risk populations. The production of this monoclonal antibody utilizes advanced recombinant DNA technology, which combines sequences from both murine (mouse) and human antibodies to create a product that is effective in conferring immunity. The administration of this antibody is typically done through an intramuscular injection, and it is recommended to be given on a monthly basis to infants who are at high risk for RSV infection. These high-risk infants include those who are premature, those with underlying conditions that compromise pulmonary function, and those with congenital heart disease. The dosage of the monoclonal antibody is determined based on the infant's weight, ensuring that each patient receives an appropriate amount of the medication. It is important to note that when billing for this service, the code 90378 should be reported for each 50 mg dose of the RSV recombinant monoclonal antibody administered intramuscularly, specifically indicating that it is the recombinant globulin product being reported.
© Copyright 2026 Coding Ahead. All rights reserved.
The RSV monoclonal antibody is indicated for use in specific high-risk populations to provide protection against respiratory syncytial virus infections. The following conditions and circumstances warrant the administration of this immunizing agent:
The administration of the RSV monoclonal antibody involves several key procedural steps to ensure safety and efficacy:
Following the administration of the RSV monoclonal antibody, it is important to observe the infant for any potential side effects or adverse reactions. Commonly, the infant may experience mild discomfort at the injection site, which typically resolves quickly. Parents or caregivers should be informed about signs of allergic reactions or other complications that may require immediate medical attention. The administration of the monoclonal antibody is generally repeated on a monthly basis during the RSV season, and ongoing assessments of the infant's health and risk factors should be conducted to determine the need for continued treatment. Documentation of each administration, including the dosage and any observed reactions, is essential for compliance and billing purposes.
| Short Descr | RSV MAB IM 50MG | Medium Descr | RESPIRATORY SYNCYTIAL VIRUS IG IM 50 MG E | Long Descr | Respiratory syncytial virus, monoclonal antibody, recombinant, for intramuscular use, 50 mg, each | Status Code | Statutory Exclusion (from MPFS, may be paid under other methodologies) | Global Days | XXX - Global Concept Does Not Apply | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | APC Status Indicator | Nonpass-Through Drugs and Nonimplantable Biologicals, Including Therapeutic Radiopharmaceuticals | ASC Payment Indicator | Drugs and biologicals paid separately when provided integral to a surgical procedure on ASC list; payment based on OPPS rate. | Type of Service (TOS) | 1 - Medical Care | Berenson-Eggers TOS (BETOS) | Y2 - Other - non-Medicare fee schedule | MUE | 4 | CCS Clinical Classification | 228 - Prophylactic vaccinations and inoculations |
|
Date
|
Action
|
Notes
|
|---|---|---|
| 2011-01-01 | Changed | Short description changed. |
| 2010-01-01 | Changed | Code description changed. |
| 2001-01-01 | Changed | Code description changed. |
| 2000-01-01 | Added | First appearance in code book in 2000. |
Get instant expert-level medical coding assistance.