2024 ICD-10-CM Diagnosis Code K35.209
Acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation
- ICD-10-CM Code:
- K35.209
- ICD-10 Code for:
- Ac appendicitis w gen peritonitis,w/o abscs,unsp as to perf
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
K35.209 is a billable diagnosis code used to specify a medical diagnosis of acute appendicitis with generalized peritonitis, without abscess, unspecified as to perforation. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.
Unspecified diagnosis codes like K35.209 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute appendicitis with generalized peritonitis
- Acute appendicitis with peritonitis
- Acute generalized peritonitis
New 2024 ICD-10-CM Code
K35.209 is new to ICD-10-CM code set for the FY 2024, effective October 1, 2023. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2023. This is a new and revised code for the FY 2024 (October 1, 2023 - September 30, 2024).
Tabular List of Diseases and Injuries
The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- (Acute) appendicitis with generalized peritonitis NOS
Index to Diseases and Injuries References
The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).
- - Appendicitis (pneumococcal) (retrocecal) - K37
- - with
- - peritonitis NEC - K35.33
- - generalized - K35.209
- - peritonitis NEC - K35.33
- - acute (catarrhal) (fulminating) (obstructive) (retrocecal) (suppurative) - K35.80
- - with
- - peritonitis NEC - K35.33
- - generalized - K35.209
- - peritonitis NEC - K35.33
- - with
- - with
- - Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) - K65.9
- - with or following
- - appendicitis
- - generalized - See Also: Appendicitis; - K35.209
- - appendicitis
- - with or following
Replacement Code
K35209 replaces the following previously assigned ICD-10-CM code(s):
- K35.20 - Acute appendicitis with gen peritonitis, without abscess
Code History
- FY 2024 - Code Added, effective from 10/1/2023 through 9/30/2024