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ICD-10-CM 2027 diagnosis code

K63.82Intestinal microbial overgrowth

Not billable — use a more specific code

K63.82 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About K63.82

K63.82 is the ICD-10-CM diagnosis code for intestinal microbial overgrowth. It belongs to category K63 (other diseases of intestine), block K55-K64 (other diseases of intestines) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within K63.8 (other specified diseases of intestine), K63.82 is specifically for intestinal microbial overgrowth. Related codes cover Dieulafoy lesion of intestine (K63.81) and other specified diseases of intestine (K63.89).

To report this condition, pick the subcode that matches the documentation: K63.821 (overgrowth), K63.822 (overgrowth) and K63.829 (unspecified).

It was added in FY2024, effective October 1, 2023.

Specific codes under K63.82

Notes that apply from higher levels

Instructions written at a parent level also apply to K63.82.

Broader instructions also apply from Chapter 11: Diseases of the digestive system.

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
  • FY2024 (effective 10/1/2023): Added
  • No changes since FY2024.

Common questions about K63.82

Is K63.82 billable?

No. K63.82 is a header code. Report one of its more specific subcodes instead.