K35Non-billableSave
K35 - Acute appendicitis
ICD-10-CM Chapter 11: Diseases of the digestive system · K35-K38 Diseases of appendix (K35-K38) · Top-level category · FY2027
Coding Guidance
K35 is a non-billable heading. Report one of the 3 more specific codes below.
Includes, Excludes and Coding Notes
Excludes 2 — Not Included HereFrom Chapter K00-K95
Not part of this code; report both codes when the patient has both conditions.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
More Specific Codes (3)
Related condition guides
Documentation requirements, coding pitfalls and FAQs for conditions coded with K35.
Chapter Information
Related ICD-10 Codes
More specific codes for K35
Other categories in this chapter
Codes at the same level as K35
- Disorders of tooth development and eruptionK00
- Embedded and impacted teethK01
- Dental cariesK02
- Other diseases of hard tissues of teethK03
- Diseases of pulp and periapical tissuesK04
- Gingivitis and periodontal diseasesK05
- Other disorders of gingiva and edentulous alveolar ridgeK06
- Other disorders of teeth and supporting structuresK08
- Cysts of oral region, not elsewhere classifiedK09
- Diseases of salivary glandsK11
- Stomatitis and related lesionsK12
- Other diseases of lip and oral mucosaK13
- Diseases of tongueK14
- EsophagitisK20
- Gastro-esophageal reflux diseaseK21
- Other diseases of esophagusK22
- Disorders of esophagus in diseases classified elsewhereK23
- Gastric ulcerK25
- Duodenal ulcerK26
- Peptic ulcer, site unspecifiedK27
- Gastrojejunal ulcerK28
- Gastritis and duodenitisK29
- Functional dyspepsiaK30
- Other diseases of stomach and duodenumK31
- Other appendicitisK36
- Unspecified appendicitisK37
- Other diseases of appendixK38
- Inguinal herniaK40
- Femoral herniaK41
- Umbilical herniaK42
- Ventral herniaK43
- Diaphragmatic herniaK44
- Other abdominal herniaK45
- Unspecified abdominal herniaK46
- Crohn's disease [regional enteritis]K50
- Ulcerative colitisK51
- Other and unspecified noninfective gastroenteritis and colitisK52
- Vascular disorders of intestineK55
- Paralytic ileus and intestinal obstruction without herniaK56
- Diverticular disease of intestineK57
32 more in this chapter.