K65 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Peritonitis.
Code also
If applicable diverticular disease of intestine (K57.-)
Use additional code
Code (B95-B97), to identify infectious agent, if known
Type 1 excludes
Acute appendicitis with generalized peritonitis (K35.2-)
Aseptic peritonitis (T81.6)
Benign paroxysmal peritonitis (E85.0)
Chemical peritonitis (T81.6)
Gonococcal peritonitis (A54.85)
Neonatal peritonitis (P78.0-P78.1)
Pelvic peritonitis, female (N73.3-N73.5)
Periodic familial peritonitis (E85.0)
Peritonitis due to talc or other foreign substance (T81.6)
Peritonitis in chlamydia (A74.81)
Peritonitis in diphtheria (A36.89)
Peritonitis in syphilis (late) (A52.74)
Peritonitis in tuberculosis (A18.31)
Peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
Peritonitis with or following appendicitis (K35.-)
Puerperal peritonitis (O85)
Retroperitoneal infections (K68.-)
Codes
Versions
2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
Code changed
Code also
- if applicable diverticular disease of intestine (K57.-)
Type 1 excludes
acute appendicitis with generalized peritonitis (K35.2)aseptic peritonitis (T81.6)benign paroxysmal peritonitis (E85.0)chemical peritonitis (T81.6)diverticulitis of both small and large intestine with peritonitis (K57.4-)diverticulitis of colon with peritonitis (K57.2-)diverticulitis of intestine, NOS, with peritonitis (K57.8-)diverticulitis of small intestine with peritonitis (K57.0-)gonococcal peritonitis (A54.85)neonatal peritonitis (P78.0-P78.1)pelvic peritonitis, female (N73.3-N73.5)periodic familial peritonitis (E85.0)peritonitis due to talc or other foreign substance (T81.6)peritonitis in chlamydia (A74.81)peritonitis in diphtheria (A36.89)peritonitis in syphilis (late) (A52.74)peritonitis in tuberculosis (A18.31)peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)peritonitis with or following appendicitis (K35.-)peritonitis with or following diverticular disease of intestine (K57.-)puerperal peritonitis (O85)retroperitoneal infections (K68.-)
- acute appendicitis with generalized peritonitis (K35.2-)
- aseptic peritonitis (T81.6)
- benign paroxysmal peritonitis (E85.0)
- chemical peritonitis (T81.6)
- gonococcal peritonitis (A54.85)
- neonatal peritonitis (P78.0-P78.1)
- pelvic peritonitis, female (N73.3-N73.5)
- periodic familial peritonitis (E85.0)
- peritonitis due to talc or other foreign substance (T81.6)
- peritonitis in chlamydia (A74.81)
- peritonitis in diphtheria (A36.89)
- peritonitis in syphilis (late) (A52.74)
- peritonitis in tuberculosis (A18.31)
- peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0)
- peritonitis with or following appendicitis (K35.-)
- puerperal peritonitis (O85)
- retroperitoneal infections (K68.-)
Use additional code
code (B95-B97), to identify infectious agent
- code (B95-B97), to identify infectious agent, if known
2018
No changes
2017
No changes
2016
New code