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HCPCS Level II
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C9399

C9399

Unclassified drugs or biologicals

The HCPCS code for unclassified drugs or biologicals is C9399.

Source: official CMS Alpha-Numeric HCPCS file (Level II only). Informational only — verify against current CMS/payer sources before use in billing.

Data current as of FY2026 CMS/NCHS release. Not affiliated with or endorsed by CMS, HHS, or NCHS.

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