K37: Unspecified appendicitis – 2026 ICD-10-CM Codes

K37 is a billable/specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Unspecified appendicitis.

Type 1 excludes

2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
Code changed
- Type 1 excludes
  ~~-unspecified appendicitis with peritonitis (K35.2-, K35.3-)~~
  unspecified appendicitis with peritonitis (K35.2-, K35.3-)
2021
No changes
2020
No changes
2019
Code changed
- Type 1 excludes
  ~~-unspecified appendicitis with peritonitis (K35.2-K35.3)~~
  -unspecified appendicitis with peritonitis (K35.2-, K35.3-)
2018
No changes
2017
No changes
2016
New code

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