## **What is the HCPCS code J9119 for?**
The HCPCS code J9119 is meant to designate the injection of cemiplimab-rwlc, specifically a 1mg dose of it. It's one of many J codes, which is a massive cluster of HCPCS codes for injections.
It serves as a form of immunotherapy for cancer patients. What this injected medicine does is to insert monoclonal antibody cemiplimab inside the body to inhibit the PD-1 pathway protein, which is the protein that restricts a person's immune system from attacking cancer cells.
It's usually given to patients who have skin cancers like metastatic cutaneous squamous cell carcinoma (locally advanced CSCC) and (metastatic) basal cell carcinoma (BCC), or those who have non-small cell lung cancer (locally advanced NSCLC).
What this ultimately does is fortify a (adult) patient's immune response against cancer cells so the immune system can prevent disease progression and shrink any tumors that have emerged.
Healthcare providers who inject this medicine will administer it intravenously.
## **Documentation requirements for J9119**
As with any procedure, especially involving injecting drugs into patients, it's important to document the following before you file for a claim that includes this code:
- The full name of the personnel who administered the injection + their credentials
- The name and address of the facility where the injection was administered
- The full name of the patient
- The date and time of the drug administration by injection
- Patient records showing they have been diagnosed with any of the aforementioned cancers
- Patient records showing what medications the patient was previously treated with (if any) and any treatments they plan to take based on any current established treatment plan (this will serve as prescribing information before deciding to use this medicine)
- Blood test results and imaging test results showing the locations and sizes of tumors
- The exact dosage and route
## **Billing requirements for J9119**
Besides the documentation requirements above, please note the following billing requirements for this HCPCS code:
- They must reflect the dosage given over the course of the treatment.
- Use either of two modifiers: JW if there's unused medication in a vial (wastage), or JZ if there's no unused medication.
Since this is an intravenous injection, please make sure to use the CPT code 96365 as well.
Please make sure to follow CMS/Medicare guidelines to prevent any claim rejections.
## **Other similar codes**
- **J9228** - Injection, ipilimumab, 1 mg
- **J9271** - Injection, pembrolizumab, 1 mg
- **J9299** - Injection, nivolumab, 1 mg
- **J9047** - Injection, carfilzomib, 1 mg
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