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Table of Neoplasms
unknown site or unspecified

Neoplasm, neoplastic: unknown site or unspecified

Site	Malignant, Primary	Malignant, Secondary	Ca in situ	Benign	Uncertain Behavior	Unspecified Behavior
—	C80.1	C79.9	D09.9	D36.9	D48.9	D49.9

Source: official CMS/NCHS ICD-10-CM Table of Neoplasms. Informational only.

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

ICD-10-CM

Diagnosis Codes Diagnosis Index External Causes Index Table of Drugs Table of Neoplasms Coding Guidelines

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ICD-10-PCS Procedure Codes HCPCS Level II Codes ICD-9-CM Diagnosis Codes ICD-9-CM Procedure Codes

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