Other appendicitis (K36) ICD-10-CM
The K36 code range covers other appendicitis with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Chronic appendicitis
- Recurrent appendicitis
Codes in the K36 Range 1 codes · 1 billable
- K36 Other appendicitis
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K36 range.
Appendicitis
Acute inflammation of the APPENDIX. Acute appendicitis is classified as simple, gangrenous, or perforated.
Appendix
A worm-like blind tube extension from the CECUM.
About the K36 Code Range
The ICD-10 code K36 is used to classify cases of appendicitis that do not fit the typical acute form but still affect the appendix. This code covers various less common types, such as chronic, recurrent, or atypical appendicitis.
Specifically, code K36 identifies conditions labeled as "other appendicitis," which include healed appendicitis, perforation of the appendix, and chronic forms like catarrhal, subacute, pelvic, or recurrent appendicitis. These synonyms help clarify that the code is appropriate for cases where inflammation persists or presents differently than the sudden onset acute appendicitis often coded under other categories. Understanding these synonyms supports precise coding by linking terms like "perforation of appendix" or "atypical appendicitis" directly to K36. Using this code correctly ensures accurate medical record documentation and billing when dealing with these specific appendiceal conditions.
Questions About This Page
How many billable codes are in the K36 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the K36 range classify?
The range classifies other appendicitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
