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ICD-10-CM 2027 diagnosis code

C79.1Secondary malignant neoplasm of bladder and other and unspecified urinary organs

Not billable — use a more specific code

C79.1 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Sec malig neoplm of bladder and oth and unsp urinary organs

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About C79.1

C79.1 is the ICD-10-CM diagnosis code for secondary malignant neoplasm of bladder and other and unspecified urinary organs. It belongs to category C79 (secondary malignant neoplasm of other and unspecified sites), block C76-C80 (malignant neoplasms of ill-defined, other secondary and unspecified sites) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within C79, choose C79.1 (bladder and other and unspecified urinary organs) only when documentation doesn't support a more specific option: kidney and renal pelvis (C79.0), skin (C79.2), brain and cerebral meninges (C79.3), other and unspecified parts of nervous system (C79.4), bone and bone marrow (C79.5), ovary (C79.6), adrenal gland (C79.7), other specified sites (C79.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: C79.10 (organs), C79.11 (bladder) and C79.19 (organs).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under C79.1

Notes that apply from higher levels

Instructions written at a parent level also apply to C79.1.

› From C79 Secondary malignant neoplasm of other and unspecified sites
Excludes1
  • secondary carcinoid tumors (C7B.-)
  • secondary neuroendocrine tumors (C7B.-)

Broader instructions also apply from Chapter 2: Neoplasms.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about C79.1

Is C79.1 billable?

No. C79.1 is a header code. Report one of its more specific subcodes instead.