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ICD-10-CM Code K35.80
Unspecified acute appendicitis

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

K35.80 is a billable ICD code used to specify a diagnosis of unspecified acute appendicitis. A 'billable code' is detailed enough to be used to specify a medical diagnosis.

The ICD code K35 is used to code Appendicitis

Appendicitis (also called epityphlitis) is inflammation of the appendix. Appendicitis commonly presents with right iliac fossa abdominal pain, nausea, vomiting, and decreased appetite. However, one third to a half of persons do not have these typical signs and symptoms. Severe complications of a ruptured appendix include widespread, painful inflammation of the inner lining of the abdominal wall and sepsis.

Specialty: General Surgery
MeSH Codes: , , ,
ICD 9 Codes: 540, 541, 542, 543

An acutely inflamed and enlarged appendix, sliced lengthwise.

Source: Wikipedia

Coding Notes for K35.80 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Acute appendicitis NOS
Acute appendicitis without (localized) (generalized) peritonitis

MS-DRG Mapping

  • DRG Group #393-395 - Other digestive system diagnoses with MCC.
  • DRG Group #393-395 - Other digestive system diagnoses with CC.
  • DRG Group #393-395 - Other digestive system diagnoses without CC or MCC.

ICD-10-CM Alphabetical Index References for 'K35.80 - Unspecified acute appendicitis'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code K35.80. Click on any term below to browse the alphabetical index.


Acute appendicitis without mention of peritonitis (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code K35.80 and a single ICD9 code, 540.9 is an approximate match for comparison and conversion purposes.

Parent Code: K35.8 - Other and unspecified acute appendicitis

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/K3580