C78.31
✓ Billable
Secondary malignant neoplasm of larynx
ICD-10-CM · FY2026 · Neoplasms
Code
C78.31
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 of liver (C7B.02)
- secondary carcinoid tumors of peritoneum (C7B.04)
Excludes2 — not included here, but may code together
- lymph node metastases (C77.0)
Frequently asked questions
What is ICD-10 code C78.31?
ICD-10-CM code C78.31 represents Secondary malignant neoplasm of larynx. It is a billable diagnosis code in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C78.31 billable?
Yes. C78.31 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is C78.31 in?
C78.31 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C78 category
C78
Secondary malignant neoplasm of respiratory and digestive organs
Non-billable
C78.0
Secondary malignant neoplasm of lung
Non-billable
C78.1
Secondary malignant neoplasm of mediastinum
Billable
C78.2
Secondary malignant neoplasm of pleura
Billable
C78.3
Secondary malignant neoplasm of other and unspecified respiratory organs
Non-billable
C78.4
Secondary malignant neoplasm of small intestine
Billable
C78.5
Secondary malignant neoplasm of large intestine and rectum
Billable
C78.6
Secondary malignant neoplasm of retroperitoneum and peritoneum
Billable
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