K52.3 Indeterminate colitis

Billable ICD-10-CM code, FY2026.

Applicable to

• Colonic inflammatory bowel disease unclassified (IBDU)

Excludes1 (never code together)

• unspecified colitis (K52.9)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 558.9 Other and unspecified noninfectious gastroenteritis and colitis (approximate)

Diagnosis Index entries for K52.3

• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › indeterminate, so stated
• Disease, diseased › colonic inflammatory bowel, unclassified (IBDU)
• IBDU (colonic inflammatory bowel dissease unclassified)

Nearby codes

• K52.1 Toxic gastroenteritis and colitis
• K52.2 Allergic and dietetic gastroenteritis and colitis
• K52.21 Food protein-induced enterocolitis syndrome
• K52.22 Food protein-induced enteropathy
• K52.29 Other allergic and dietetic gastroenteritis and colitis
• K52.3 Indeterminate colitis (this code)
• K52.8 Other specified noninfective gastroenteritis and colitis
• K52.81 Eosinophilic gastritis or gastroenteritis
• K52.82 Eosinophilic colitis
• K52.83 Microscopic colitis
• K52.831 Collagenous colitis