J2516 Pentamidine Injection HCPCS Reimbursement

HCPCS Level II code J2516 denotes a 1 mg injection of pentamidine isethionate, a parenteral antimicrobial used in treatment of certain protozoal and fungal infections. Nationally, accurate use of this HCPCS Level II code supports clinical documentation, reimbursement for drug administration, and tracking of high-cost or specialty antimicrobial utilization across inpatient and outpatient settings. This code matters for hospitals, infusion centers, and outpatient clinics that administer parenteral anti-infective therapies.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for pentamidine use, benchmark considerations for utilization and billing, and policy and coverage themes that affect reimbursement and claims processing. The publication outlines typical sites of service and service type associated with the code, highlights coding practices to ensure correct billing of the medication unit, and summarizes common payer approaches to coverage and billing oversight.

This resource is intended for billing managers, clinical coders, pharmacy and infusion service administrators, and policy analysts seeking a national perspective on coding and administrative considerations for parenteral pentamidine.

Billing Code Overview

HCPCS Level II code J2516 represents an injection of pentamidine isethionate, 1 mg. This code documents administration of the specified dose of pentamidine, an antiprotozoal and antimicrobial agent used in clinical settings to treat infections such as Pneumocystis jirovecii pneumonia and certain protozoal infections when indicated.

Service type: Injection medication administration
Typical site of service: Hospital inpatient or outpatient clinic, emergency department, or other clinical infusion settings where parenteral antimicrobial therapy is provided

Data not available in the input for modifiers, associated taxonomies, ICD-10 diagnoses, related codes, and specific service line.

Clinical Context

A typical patient is an adult with suspected or confirmed Pneumocystis jirovecii pneumonia (PJP) who cannot tolerate or has contraindications to first-line oral or intravenous trimethoprim-sulfamethoxazole. The patient may be immunocompromised (for example, receiving chemotherapy, living with HIV/AIDS with low CD4 counts, or on chronic immunosuppression for organ transplant). Pentamidine isethionate is administered by deep intramuscular injection or intravenous infusion depending on clinical judgment and institutional protocol; the billing code J2516 denotes the drug quantity (1 mg increments). Clinical workflow includes verification of indication and allergies, vital signs and baseline laboratory review (renal function, electrolytes, glucose), informed consent, preparation of the dose by pharmacy, administration by a licensed clinician or nurse, monitoring for adverse events (hypotension, nephrotoxicity, hypoglycemia, hyperglycemia, pancreatitis), documentation of lot numbers and dose, and scheduling follow-up labs and clinical reassessment.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management (E/M) service by the same physician on the same day of the procedure	Use when a distinct E/M visit is performed the same day as administration for unrelated or separately identifiable issues

Taxonomy Code	Specialty	Notes
`207Q00000X`	Infectious Disease	Commonly orders and oversees pentamidine therapy for opportunistic infections
`208000000X`	Internal Medicine	Manages hospitalized or complex medical patients requiring parenteral anti-infectives
`363L00000X`	Hospitalist	Often coordinates inpatient administration and monitoring
`163W00000X`	Emergency Medicine	May administer initial dose in urgent presentations
`165000000X`	Pulmonary Disease	Involved when respiratory infection such as PJP is suspected or treated

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`96413`	Chemotherapy administration, intravenous infusion technique; up to 1 hour, single or initial substance/drug	May be used when pentamidine is administered by IV infusion and time-based infusion billing applies
`96365`	Intravenous infusion, for therapy, prophylaxis, or diagnosis; initial, up to 1 hour	Used for therapeutic IV infusions when pentamidine is given as a timed infusion in an outpatient infusion center
`96372`	Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular	Used when pentamidine is administered via intramuscular injection
`36415`	Collection of venous blood by venipuncture	Commonly performed before or after administration for monitoring labs (electrolytes, renal function)
`99070`	Supplies and materials (e.g., sterile tray) provided by the physician over and above those usually included with the office visit or procedure	Used to bill for additional supply costs associated with drug administration when allowed by payer

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`B59`	Pneumocystosis	Primary indication for pentamidine when trimethoprim-sulfamethoxazole is contraindicated or not tolerated
`B20`	Human immunodeficiency virus [HIV] disease	Underlying immunosuppression that increases risk for Pneumocystis jirovecii pneumonia
`D61.9`	Aplastic anemia, unspecified	Example of bone marrow failure state leading to immunosuppression and risk for opportunistic infections
`T45.1X5A`	Adverse effect of antiprotozoal drugs, initial encounter	Captures documented adverse reaction to antiprotozoal agents when pentamidine causes side effects
`N17.9`	Acute kidney failure, unspecified	Relevant for monitoring and documenting nephrotoxicity risk associated with pentamidine

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Summary & Overview

HCPCS J2516: Pentamidine Isethionate Injection, 1 mg