ICD-10-CM 2027
ICD-10 code for diverticulum
Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding
From the official ICD-10-CM alphabetic index entry “Diverticulum, diverticula (multiple)”. Page updated September 29, 2026.
About coding diverticulum
The ICD-10-CM code for diverticulum is K57.90 (Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding). The official index lists 40 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on K57.90.
Within K57.9, choose K57.90 (Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding) only when documentation doesn't support a more specific option: Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding (K57.91), Diverticulitis of intestine, part unspecified, without perforation or abscess without bleeding (K57.92) and Diverticulitis of intestine, part unspecified, without perforation or abscess with bleeding (K57.93).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 391 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC, relative weight 1.2392) and DRG 392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC, relative weight 0.7645), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific diverticulum codes (official index)
- appendix (noninflammatory) K38.2 — Diverticulum of appendix
- bladder (sphincter) N32.3 — Diverticulum of bladder
- congenital Q64.6 — Congenital diverticulum of bladder
- bronchus (congenital) Q32.4 — Other congenital malformations of bronchus
- acquired J98.09 — Other diseases of bronchus, not elsewhere classified
- calyx, calyceal (kidney) N28.89 — Other specified disorders of kidney and ureter
- cardia (stomach) K31.4 — Gastric diverticulum
- cecum
- congenital Q43.8 — Other specified congenital malformations of intestine
- colon
- congenital Q43.8 — Other specified congenital malformations of intestine
- duodenum
- congenital Q43.8 — Other specified congenital malformations of intestine
- epiphrenic (esophagus) K22.5 — Diverticulum of esophagus, acquired
- esophagus (congenital) Q39.6 — Congenital diverticulum of esophagus
- acquired (epiphrenic) (pulsion) (traction) K22.5 — Diverticulum of esophagus, acquired
- eustachian tube
- fallopian tube N83.8 — Other noninflammatory disorders of ovary, fallopian tube and broad ligament
- gastric K31.4 — Gastric diverticulum
- heart (congenital) Q24.8 — Other specified congenital malformations of heart
- ileum
- jejunum
- kidney (pelvis) (calyces) N28.89 — Other specified disorders of kidney and ureter
- with calculus
- Meckel's (displaced) (hypertrophic) Q43.0 — Meckel's diverticulum (displaced) (hypertrophic)
- malignant
- midthoracic K22.5 — Diverticulum of esophagus, acquired
- organ or site, congenital NEC
- pericardium (congenital) (cyst) Q24.8 — Other specified congenital malformations of heart
- acquired I31.8 — Other specified diseases of pericardium
- pharyngoesophageal (congenital) Q39.6 — Congenital diverticulum of esophagus
- acquired K22.5 — Diverticulum of esophagus, acquired
- pharynx (congenital) Q38.7 — Congenital pharyngeal pouch
- rectosigmoid
- congenital Q43.8 — Other specified congenital malformations of intestine
- rectum
- Rokitansky's K22.5 — Diverticulum of esophagus, acquired
- seminal vesicle N50.89 — Other specified disorders of the male genital organs
- sigmoid
- congenital Q43.8 — Other specified congenital malformations of intestine
- stomach (acquired) K31.4 — Gastric diverticulum
- congenital Q40.2 — Other specified congenital malformations of stomach
- trachea (acquired) J39.8 — Other specified diseases of upper respiratory tract
- ureter (acquired) N28.89 — Other specified disorders of kidney and ureter
- congenital Q62.8 — Other congenital malformations of ureter
- ureterovesical orifice N28.89 — Other specified disorders of kidney and ureter
- urethra (acquired) N36.1 — Urethral diverticulum
- congenital Q64.79 — Other congenital malformations of bladder and urethra
- ventricle, left (congenital) Q24.8 — Other specified congenital malformations of heart
- vesical N32.3 — Diverticulum of bladder
- congenital Q64.6 — Congenital diverticulum of bladder
- Zenker's (esophagus) K22.5 — Diverticulum of esophagus, acquired
Common questions about diverticulum ICD-10 codes
What is the ICD-10 code for diverticulum?
- K57.90 — Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding. More specific codes apply when the documentation supports them: K38.2, N32.3, Q64.6, Q32.4 and others below.
What is the ICD-10 code for appendix diverticulum?
- K38.2 — Diverticulum of appendix.
What is the ICD-10 code for bladder diverticulum?
- N32.3 — Diverticulum of bladder.
What is the ICD-10 code for bronchus diverticulum?
- Q32.4 — Other congenital malformations of bronchus.
What is the ICD-10 code for cardia diverticulum?
- K31.4 — Gastric diverticulum.
What is the ICD-10 code for epiphrenic diverticulum?
- K22.5 — Diverticulum of esophagus, acquired.
What is the ICD-10 code for esophagus diverticulum?
- Q39.6 — Congenital diverticulum of esophagus.
Is K57.90 billable?
- Yes. K57.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K57.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K57.90 as a principal diagnosis.
Is K57.90 a CC or MCC?
- No. K57.90 is neither a CC nor an MCC under MS-DRG v44.0.