Docdemic

ICD-10-CM diagnosis code

C09.8 Malignant neoplasm of overlapping sites of tonsil

Billable
Yes, a complete code (FY2026)
Category
C09 Malignant neoplasm of tonsil
Chapter
2. Neoplasms

Documenting C09.8? Write the note in seconds

Paste your rough notes and get a structured SOAP note. Free, no account needed.

Try the free generator

Other codes in C09

4 complete codes in this category.

Documentation tips

  • Make sure the note supports every element of the title, “Malignant neoplasm of overlapping sites of tonsil”: each detail in it should be traceable to the history, examination or assessment.
  • Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
  • Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to C09.

The international WHO ICD-10 also has C09.8, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.

ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.

Look up another code

Stop looking codes up by hand

Docdemic listens to the consultation, writes the note and suggests the diagnosis and procedure codes that fit it, each one checked against your country’s official code list.

Try Docdemic free