K65.4 – Sclerosing mesenteritis

ICD-10-CM 2027 diagnosis code · Diseases of peritoneum, retroperitoneum and pelvis

Billable code

ICD-10-CM code K65.4
Code
K65.4 (claims format: K654)
Description
Sclerosing mesenteritis
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
11. Diseases of the digestive system (K00-K95)
Block
K65-K6A Diseases of peritoneum, retroperitoneum and pelvis
Parent codes
K65

Notes for K65.4

Applicable to:
  • Fat necrosis of peritoneum
  • (Idiopathic) sclerosing mesenteric fibrosis
  • Mesenteric lipodystrophy
  • Mesenteric panniculitis
  • Retractile mesenteritis

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

K65 – Peritonitis

Excludes1 (not coded here):
  • 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, if known
Code also:
  • if applicable diverticular disease of intestine (K57.-)

Index terms for K65.4

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in K65

Frequently asked questions

What is ICD-10 code K65.4?

K65.4 is the ICD-10-CM code for sclerosing mesenteritis, in the block K65-K6A (Diseases of peritoneum, retroperitoneum and pelvis).

Is K65.4 a billable code?

Yes. K65.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does K65.4 belong to?

It belongs to category K65 – Peritonitis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.