2024 ICD-10-CM Diagnosis Code C4A.20

by

Merkel cell carcinoma of unspecified ear and external auricular canal

  • C4A.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Merkel cell carcinoma of unsp ear and external auric canal
  • The 2024 edition of ICD-10-CM C4A.20 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of C4A.20 – other international versions of ICD-10 C4A.20 may differ.

The following code(s) above C4A.20 contain annotation back-references

 that may be applicable to C4A.20:

Approximate Synonyms

  • Merkel cell carcinoma of ear
  • Merkel cell carcinoma, ear

ICD-10-CM C4A.20 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 595 Major skin disorders with mcc
  • 596 Major skin disorders without mcc

Convert C4A.20 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change