C78 Secondary malignant neoplasm of respiratory and digestive organs

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Secondary malignant neoplasm of respiratory and digestive organs is C78 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
C76-C80: Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
Category C78
17 codes (13 billable)
FY2026 Status
Stable since FY2024
Excludes1
Not coded here. These conditions should NOT be coded together with C78.
  • secondary carcinoid tumors of liver (C7B.02)
  • secondary carcinoid tumors of peritoneum (C7B.04)
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • lymph node metastases (C77.0)

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a
Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference C78 with the canonical source and edition:

C78 — Secondary malignant neoplasm of respiratory and digestive organs. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/C78

Canonical URL: https://icd10codingpro.com/codes/C78

Related Codes

More Specific Codes

C78.0 Secondary malignant neoplasm of lung C78.1 Secondary malignant neoplasm of mediastinum C78.2 Secondary malignant neoplasm of pleura C78.3 Secondary malignant neoplasm of other and unspecified respiratory organs C78.4 Secondary malignant neoplasm of small intestine C78.5 Secondary malignant neoplasm of large intestine and rectum C78.6 Secondary malignant neoplasm of retroperitoneum and peritoneum C78.7 Secondary malignant neoplasm of liver and intrahepatic bile duct C78.8 Secondary malignant neoplasm of other and unspecified digestive organs

All Codes in C78

Every most-specific code under C78 Secondary malignant neoplasm of respiratory and digestive organs (13 codes):

Show the complete C78 code list
C78.00 Secondary malignant neoplasm of unspecified lung C78.01 Secondary malignant neoplasm of right lung C78.02 Secondary malignant neoplasm of left lung C78.1 Secondary malignant neoplasm of mediastinum C78.2 Secondary malignant neoplasm of pleura C78.30 Secondary malignant neoplasm of unspecified respiratory organ C78.39 Secondary malignant neoplasm of other respiratory organs C78.4 Secondary malignant neoplasm of small intestine C78.5 Secondary malignant neoplasm of large intestine and rectum C78.6 Secondary malignant neoplasm of retroperitoneum and peritoneum C78.7 Secondary malignant neoplasm of liver and intrahepatic bile duct C78.80 Secondary malignant neoplasm of unspecified digestive organ C78.89 Secondary malignant neoplasm of other digestive organs
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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