C78
⚠ Non-billable
Secondary malignant neoplasm of respiratory and digestive organs
ICD-10-CM · FY2026 · Neoplasms
Code
C78
System
ICD-10-CM
Billable
No — use specific code
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?
ICD-10-CM code C78 represents Secondary malignant neoplasm of respiratory and digestive organs. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C78 billable?
No. C78 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C78 in?
C78 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C78 category
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
C78.7
Secondary malignant neoplasm of liver and intrahepatic bile duct
Billable
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