Summary & Overview
CPT 94642: Pentamidine Nebulization for Pneumocystis Pneumonia
CPT code 94642 denotes administration of pentamidine via a nebulizing device for treatment or prevention of Pneumocystis carinii pneumonia (PCP). This code captures a specialized respiratory medication administration procedure that has implications for infectious disease management and outpatient infusion/respiratory service workflows. Nationally, accurate coding for inhaled pentamidine supports clinical documentation, appropriate site-of-service designation, and payer reimbursement across public and private plans.
Key payers in typical coverage analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for inhaled pentamidine, common service settings, and the operational considerations that affect billing and claims processing. The publication outlines common modifiers used with this service (input provided), discusses benchmarking and policy considerations where available, and highlights documentation elements necessary to substantiate use of this procedure.
This summary is aimed at revenue cycle professionals, clinicians involved in outpatient respiratory therapy, and policy analysts seeking clarity on how this drug-delivery procedure is represented in claims data and payer policies. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 94642 describes the administration of pentamidine by nebulization, where a patient inhales the medication via a nebulizing device to treat or prevent Pneumocystis carinii pneumonia. The service type is a respiratory medication administration procedure delivered by inhalation using a nebulizer.
Typical site of service for this procedure is an outpatient clinic or physician office or other ambulatory care setting where aerosolized antimicrobial therapy can be administered under clinical supervision. If inpatient delivery occurs, it would take place in a hospital setting equipped for aerosolized drug administration.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with advanced immunosuppression (for example, HIV/AIDS or recipients of immunosuppressive therapy) who requires prophylaxis or treatment for Pneumocystis jirovecii (carinii) pneumonia. The patient presents to an outpatient infusion clinic, pulmonary clinic, or specialty infectious disease clinic for administration of inhaled pentamidine using a nebulizing device. The workflow includes verification of indication and allergy history, assessment of baseline vital signs and respiratory status, informed consent for aerosolized therapy, preparation of pentamidine by pharmacy per institutional protocol, delivery of medication via a dedicated nebulizer and mouthpiece or mask, monitoring during and for a period after administration for bronchospasm or adverse events, and documentation of procedure start/stop times, medication dose, lot numbers, and patient response. Typical sites of service include outpatient infusion centers, hospital outpatient departments, specialty clinics, and occasionally inpatient hospital wards when inpatient administration is necessary.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day | Use when a distinct E/M visit occurs on the same day as the procedure and is medically necessary and documented separately. |
| 26 | Professional component | Use when billing only for the physician’s professional component separate from technical services (rare for this procedure). |