What is code J9999?

Procedure codes J3490 and J9999 are unlisted codes for injection services. J3490 – Unclassified drugs. J9999 – Not otherwise classified, antineoplastic drugs. When billing for these codes, the provider must indicate the name, strength, and dosage of the drug in block 19 on the CMS-1500 claim form (or in 2400.Nov 6, 2020

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