Sclerosing mesenteritis
Diseases of the Digestive System·Peritonitis·subcategory·FY 2027
Peritoneal Disorders: Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.
Read more about peritoneal disorders on MedlinePlus · Source: MedlinePlus, National Library of Medicine
Also indexed as: Fat, necrosis, mesentery; Fat, necrosis, omentum; Fibrosis, sclerosing mesenteric; Lipodystrophy, mesenteric; Mesenteritis, retractile; Mesenteritis, sclerosing; Necrosis, fat, fatty, abdominal wall; Necrosis, fat, fatty, mesentery; Necrosis, fat, fatty, omentum; Necrosis, fat, fatty, peritoneum; Necrosis, mesentery, fat; Necrosis, omentum, fat; Necrosis, peritoneum, fat; Panniculitis, mesenteric
Instructional notes
Includes: conditions that are coded here
- Fat necrosis of peritoneum
- (Idiopathic) sclerosing mesenteric fibrosis
- Mesenteric lipodystrophy
- Mesenteric panniculitis
- Retractile mesenteritis
Also applies, from K65: Peritonitis
These notes sit on K65 and apply to every code under it, including K65.4.
Excludes1: not coded here, use a different code
- 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.-)
Code also: add a code for this too, order depends on the encounter
- if applicable diverticular disease of intestine (K57.-)
Use additional code: add a second code for this, listed after this one
- code (B95-B97), to identify infectious agent, if known
Where K65.4 sits
- K65-K6A Diseases of peritoneum, retroperitoneum and pelvis (K65-K6A)
- K65 Peritonitis
- K65.4 Sclerosing mesenteritis
MS-DRGs
As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
ICD-9-CM equivalent
Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).
- 567.82 Sclerosing mesenteritis