ICD-10 Code
International Classification of Diseases, 10th Revision
Aug 23, 2017

See: Peritonitis

K65 is NOT a complete or valid ICD 10 diagnosis code.

You should code each health care encounter to the level of certainty known for that encounter. When sufficient clinical information is not known or available to assign a more specific code, it is acceptable to report the appropriate unspecified code.

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Use Additional Code
  • code (B95-B97), to identify infectious agent
  • 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.-)

More specific codes for Peritonitis

  • K65.0 - Generalized (acute) peritonitis
  • K65.1 - Peritoneal abscess
  • K65.2 - Spontaneous bacterial peritonitis
  • K65.3 - Choleperitonitis
  • K65.4 - Sclerosing mesenteritis
  • K65.8 - Other peritonitis
  • K65.9 - Peritonitis, unspecified
See also ICD 10 code for
Back to K65
See the 2017 ICD-10-CM Coding Guidelines.

Questions related to K65 Peritonitis

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.