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ICD-10-CM Codes
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K00-K95
Diseases of the digestive system
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K35-K38
Diseases of appendix
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K35-
Acute appendicitis
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2021 ICD-10-CM Diagnosis Code K35.3
2021 ICD-10-CM Diagnosis Code K35.3
Acute appendicitis with localized peritonitis
2016 2017 2018 2019 - Converted to Parent Code 2020 2021 Non-Billable/Non-Specific Code
- K35.3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM K35.3 became effective on October 1, 2020.
- This is the American ICD-10-CM version of K35.3 - other international versions of ICD-10 K35.3 may differ.
The following code(s) above
K35.3 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
K35.3:
- Acute appendicitis with peritoneal abscess
- Localized peritonitis due to acute appendicitis
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): Deleted code
- 2019 (effective 10/1/2018): New code
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
Code annotations containing back-references to K35.3:
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Type 1 Excludes: K37
ICD-10-CM Diagnosis Code K37
Unspecified appendicitis
2016 2017 2018 2019 2020 2021 Billable/Specific Code
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Type 2 Excludes: K63.0, K63.1
ICD-10-CM Diagnosis Code K63.0
Abscess of intestine
2016 2017 2018 2019 2020 2021 Billable/Specific Code
Type 1 Excludes- abscess of intestine with Crohn's disease (K50.014, K50.114, K50.814, K50.914,)
- abscess of intestine with diverticular disease (K57.0, K57.2, K57.4, K57.8)
- abscess of intestine with ulcerative colitis (K51.014, K51.214, K51.314, K51.414, K51.514, K51.814, K51.914)
Type 2 Excludes- abscess of anal and rectal regions (K61.-)
- abscess of appendix (K35.3-)
ICD-10-CM Diagnosis Code K63.1
Perforation of intestine (nontraumatic)
2016 2017 2018 2019 2020 2021 Billable/Specific Code
Applicable To- Perforation (nontraumatic) of rectum
Type 1 Excludes- perforation (nontraumatic) of duodenum (K26.-)
- perforation (nontraumatic) of intestine with diverticular disease (K57.0, K57.2, K57.4, K57.8)
ICD-10-CM Codes Adjacent To K35.3
K31.82 Dieulafoy lesion (hemorrhagic) of stomach and duodenum
K31.89 Other diseases of stomach and duodenum
K31.9 Disease of stomach and duodenum, unspecified
K35.2 Acute appendicitis with generalized peritonitis
K35.3
Acute appendicitis with localized peritonitis
K35.30 …… without perforation or gangrene
K35.31 …… and gangrene, without perforation
K35.32 Acute appendicitis with perforation and localized peritonitis, without abscess
K35.33 Acute appendicitis with perforation and localized peritonitis, with abscess
K35.8 Other and unspecified acute appendicitis
K35.80 Unspecified acute appendicitis
K35.89 Other acute appendicitis
K35.890 …… without perforation or gangrene
K35.891 …… without perforation, with gangrene
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
