All ICD10 Codes

K35

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Acute appendicitis

Use a more specific code (0 billable, 3 non-billable)
K35.2Acute appendicitis with generalized peritonitishas subcodesK35.3Acute appendicitis with localized peritonitishas subcodesK35.8Other and unspecified acute appendicitishas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K35-K38Diseases of appendix (K35-K38)
K35Acute appendicitisNot billable
K35.2Acute appendicitis with generalized peritonitisSubcodes
K35.3Acute appendicitis with localized peritonitisSubcodes
K35.8Other and unspecified acute appendicitisSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K35:

chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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