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ICD-10-CM 2027 diagnosis code

C13Malignant neoplasm of hypopharynx

Not billable — use a more specific code

C13 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

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 C13

C13 is the ICD-10-CM diagnosis code for malignant neoplasm of hypopharynx. It belongs to block C00-C14 (malignant neoplasms of lip, oral cavity and pharynx) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C13.0 (region), C13.1 (aspect), C13.2 (hypopharynx), C13.8 (hypopharynx) and C13.9 (unspecified).

The conditions in its Excludes2 note aren't part of C13, but may be coded alongside it if the patient has both: malignant neoplasm of pyriform sinus (C12).

Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.

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 C13

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • malignant neoplasm of pyriform sinus (C12)
Use additional codeAdd a secondary code to fully describe the condition
  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Notes that apply from higher levels

Instructions written at a parent level also apply to C13.

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 C13

Is C13 billable?

No. C13 is a header code. Report one of its more specific subcodes instead.