K35 ICD-10-CM Code: Acute appendicitis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
K35Acute appendicitis
ICD-10-CM diagnosis code · United States clinical modification
Where K35 sits
- 1
Chapter 11
Diseases of the digestive system (K00-K95)
- 2
Section
Diseases of appendix (K35-K38)
- 3
Category K35
Acute appendicitis
- 4
Code K35
Acute appendicitis
Codes under K35
K35 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for K35.
Code first
No “code first” instruction is listed for K35.
Use additional code
No “use additional code” instruction is listed for K35.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for K35.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for K35.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code K35 mean?
K35 is the FY 2027 U.S. ICD-10-CM code for “Acute appendicitis.”
Is K35 a billable or specific ICD-10-CM code?
No. K35 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is K35 located in ICD-10-CM?
K35 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Diseases of appendix (K35-K38) (K35–K38), under category K35, Acute appendicitis.
What coding notes are listed for K35?
No inclusion terms are listed for K35 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.