HCPCS J9999
Antineoplastic (chemotherapy) drug, not otherwise classified
Last reviewed August 2026 · DataLily AI data team
What does HCPCS J9999 mean?
HCPCS J9999 is the not-otherwise-classified (NOC) code for antineoplastic drugs. It is reported when a chemotherapy drug has no specific J-code of its own, with the drug name and dose documented on the claim so the payer can identify what was administered.
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HCPCS J9999 at a glance
- Code
- J9999
- Code type
- CPT/HCPCS
- Short descriptor
- Chemotherapy drug
- Category
- ASC Ancillary
- ASC eligibility
- ASC-eligible (ancillary)
- Typical setting
- Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
What is HCPCS code J9999?
HCPCS J9999 is the not-otherwise-classified (NOC) code for antineoplastic drugs. It is reported when a chemotherapy drug has no specific J-code of its own, with the drug name and dose documented on the claim so the payer can identify what was administered. Its official short descriptor is "Chemotherapy drug", and in the ASC context it is grouped under ASC Ancillary.
Is HCPCS J9999 eligible in an ambulatory surgery center (ASC)?
HCPCS J9999 is an ancillary service that can be provided in the ASC setting when it supports a surgical procedure.
Where is HCPCS J9999 typically performed?
Ambulatory surgery center (POS 24) or hospital outpatient department (POS 22).
Reference information about ASC eligibility and typical procedure setting. Codes, descriptors, and ASC-eligibility status change over time. This is a coding reference, not billing, coding, or legal advice. Always verify against current guidance and individual payer policy before scheduling or billing. CPT is a registered trademark of the American Medical Association. Read the DataLily AI data methodology.