K65.4 – Sclerosing mesenteritis
ICD-10-CM 2027 diagnosis code · Diseases of peritoneum, retroperitoneum and pelvis
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.-)
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:
- Fat, necrosis, omentum
- Fat, necrosis, mesentery
- Mesenteritis, retractile
- Mesenteritis, sclerosing
- Panniculitis, mesenteric
- Lipodystrophy, mesenteric
- Necrosis, necrotic, omentum, fat
- Necrosis, necrotic, mesentery, fat
- Necrosis, necrotic, peritoneum, fat
- Necrosis, necrotic, fat, fatty, omentum
- Fibrosis, fibrotic, sclerosing mesenteric
- Necrosis, necrotic, fat, fatty, mesentery
- Necrosis, necrotic, fat, fatty, peritoneum
- Necrosis, necrotic, fat, fatty, abdominal wall
Related codes in K65
- K65.0 – Generalized (acute) peritonitisBillable
- K65.1 – Peritoneal abscessBillable
- K65.2 – Spontaneous bacterial peritonitisBillable
- K65.3 – CholeperitonitisBillable
- K65.8 – Other peritonitisBillable
- K65.9 – Peritonitis, unspecifiedBillable
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.