C79.83
✓ Billable
Secondary malignant neoplasm of oral cavity
ICD-10-CM · FY2026 · Neoplasms
Code
C79.83
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- secondary carcinoid tumors (C7B.-)
- secondary neuroendocrine tumors (C7B.-)
Frequently asked questions
What is ICD-10 code C79.83?
ICD-10-CM code C79.83 represents Secondary malignant neoplasm of oral cavity. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C79.83 billable?
Yes. C79.83 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is C79.83 in?
C79.83 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C79 category
C79
Secondary malignant neoplasm of other and unspecified sites
Non-billable
C79.0
Secondary malignant neoplasm of kidney and renal pelvis
Non-billable
C79.1
Secondary malignant neoplasm of bladder and other and unspecified urinary organs
Non-billable
C79.2
Secondary malignant neoplasm of skin
Billable
C79.3
Secondary malignant neoplasm of brain and cerebral meninges
Non-billable
C79.4
Secondary malignant neoplasm of other and unspecified parts of nervous system
Non-billable
C79.5
Secondary malignant neoplasm of bone and bone marrow
Non-billable
C79.6
Secondary malignant neoplasm of ovary
Non-billable
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