C78.3 Secondary malignant neoplasm of other and unspecified respiratory organs

The ICD-10-CM code for Secondary malignant neoplasm of other and unspecified respiratory organs is C78.3 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

2: Neoplasms (C00-D49)

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

Official Coding Guidelines

Tx of primary site (TOC entry)

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

Tx of secondary site (TOC entry)

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

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

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool

Cite This Page

Reference C78.3 with the canonical source and edition:

C78.3 — Secondary malignant neoplasm of other and unspecified respiratory organs. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/C78.3

Canonical URL: https://icd10codingpro.com/codes/C78.3