Unspecified appendicitis (K37) ICD-10-CM
The K37 code range covers unspecified appendicitis with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the K37 Range 1 codes · 1 billable
- K37 Unspecified appendicitis
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K37 range.
Appendicitis
Acute inflammation of the APPENDIX. Acute appendicitis is classified as simple, gangrenous, or perforated.
About the K37 Code Range
Appendicitis is acute inflammation of the appendix. It can be described as simple, gangrenous, or perforated.
K37 is the category for unspecified appendicitis. It sits within diseases of the appendix, which are part of diseases of the digestive system.
Questions About This Page
How many billable codes are in the K37 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the K37 range classify?
The range classifies unspecified 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 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
