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Dx

ICD-10-CM 2027

ICD-10 code for Diverticulosis

K57.90

Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Diverticulosis”. Page updated September 29, 2026.

About coding Diverticulosis

The ICD-10-CM code for Diverticulosis is K57.90 (Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding). The official index lists 9 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 Diverticulosis codes (official index)

  • with bleeding K57.91 — Diverticulosis of intestine, part unspecified, without perforation or abscess with bleeding
  • large intestine K57.30 — Diverticulosis of large intestine without perforation or abscess without bleeding
  • with
  • bleeding K57.31 — Diverticulosis of large intestine without perforation or abscess with bleeding
  • small intestine K57.50 — Diverticulosis of both small and large intestine without perforation or abscess without bleeding
  • with bleeding K57.51 — Diverticulosis of both small and large intestine without perforation or abscess with bleeding
  • small intestine K57.10 — Diverticulosis of small intestine without perforation or abscess without bleeding
  • with
  • bleeding K57.11 — Diverticulosis of small intestine without perforation or abscess with bleeding
  • large intestine K57.50 — Diverticulosis of both small and large intestine without perforation or abscess without bleeding
  • with bleeding K57.51 — Diverticulosis of both small and large intestine without perforation or abscess with bleeding

Common questions about Diverticulosis ICD-10 codes

What is the ICD-10 code for Diverticulosis?

K57.90 — Diverticulosis of intestine, part unspecified, without perforation or abscess without bleeding. More specific codes apply when the documentation supports them: K57.91, K57.30, K57.31, K57.50 and others below.

What is the ICD-10 code for large intestine diverticulosis?

K57.30 — Diverticulosis of large intestine without perforation or abscess without bleeding.

What is the ICD-10 code for small intestine diverticulosis?

K57.10 — Diverticulosis of small intestine without perforation or abscess without bleeding.

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.