HCPCS Code J9305: Injection, Pemetrexed, Not Otherwise Specified, 10 mg

## **HCPCS Code J9305 documentation requirements** Accurate documentation is essential when billing. Medicare and other payers require complete, detailed records that demonstrate medical necessity and compliance with drug billing policies. ### **Physician’s order** The medical record must include a valid physician’s order specifying pemetrexed as the prescribed drug. The order should clearly specify the dosage, route of administration, frequency, and treatment plan, all of which are consistent with the patient’s diagnosis. ### **Drug details and dosage** Documentation must record the exact dose of pemetrexed given, reported in 10 mg increments, along with the route of administration (typically intravenous infusion). The total milligrams prepared, administered, and if applicable, discarded must all be documented. ### **Modifiers for wastage** Medicare requires the use of JW and JZ modifiers for single-use vials. JW must be appended to report the amount of drug discarded, while JZ is required when no amount was discarded. The medical record must support the billed units and wastage amounts. ### **Medical necessity** The patient’s diagnosis must be documented in the record to establish medical necessity. Pemetrexed is primarily used for non-small cell lung cancer and malignant pleural mesothelioma, so diagnosis codes must align with accepted indications and payer policy. ### **Proof of administration** The record must reflect that pemetrexed was prepared and administered to the patient, including details such as the date of service, the setting of care, and the provider who administered the drug. While infusion times are required for chemotherapy administration CPT codes, they are not required for the J9305 drug code itself. ### **Payer-specific requirements** Medicare Administrative Contractors (MACs) and commercial payers may impose additional documentation requirements, such as prior authorization or specific diagnosis code edits. Providers should always confirm local policy before billing.

## **HCPCS Code J9305 billing requirements** Billing for HCPCS Code J9305 must follow CMS and Medicare Part B drug billing rules to ensure proper reimbursement. The code represents “Injection, pemetrexed, not otherwise specified, 10 mg” and is billed based on the exact dosage administered. ### **Units of service** Providers must bill J9305 in 10 mg increments, reporting the total dosage given to the patient. The claim should reflect the number of 10 mg units administered, and Medicare allows a maximum of 999 units per claim line. ### **Modifiers** JW and JZ modifiers apply to single-dose vials. JW is used to report any discarded drug, while JZ is used when no drug was discarded. For route of administration, JA should be used with the J-code for intravenous delivery, while JB is used for subcutaneous delivery. ### **Administration reporting** The J9305 code covers only the drug itself. Administration services such as intravenous infusion must be reported separately using the appropriate CPT chemotherapy administration codes, such as 96413 for IV infusion. ### **Diagnosis linkage** Claims must include diagnosis codes that demonstrate medical necessity for pemetrexed. The drug is primarily covered for indications such as non-small cell lung cancer and malignant pleural mesothelioma. Payer-specific rules and Medicare Administrative Contractor policies must be reviewed to confirm coverage for each claim.

## **Other relevant codes** - **J9304**: Injection, pemetrexed (Pemfexy), 10 mg - **J9294**: Injection, pemetrexed (Hospira), 10 mg, not therapeutically equivalent to J9305 - **J9296**: Injection, pemetrexed (Accord), 10 mg, not therapeutically equivalent to J9305 - **J9297**: Injection, pemetrexed (Sandoz), 10 mg, not therapeutically equivalent to J9305 - **J9314**: Injection, pemetrexed (Teva), 10 mg, not therapeutically equivalent to J9305 - **J9322**: Injection, pemetrexed (BluePoint), 10 mg, not therapeutically equivalent to J9305 - **J9323**: Injection, pemetrexed ditromethamine, 10 mg - **J9324**: Injection, pemetrexed (Pemrydi RTU), 10 mg