K59.2 Neurogenic bowel, not elsewhere classified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from K59 Other functional intestinal disorders

Excludes1 (never code together)

• change in bowel habit NOS (R19.4)
• intestinal malabsorption (K90.-)
• psychogenic intestinal disorders (F45.8)

Excludes2 (not included here)

• functional disorders of stomach (K31.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 564.81 Neurogenic bowel

Diagnosis Index entries for K59.2

• Neurogenic › bowel NEC

Nearby codes

• K59.02 Outlet dysfunction constipation
• K59.03 Drug induced constipation
• K59.04 Chronic idiopathic constipation
• K59.09 Other constipation
• K59.1 Functional diarrhea
• K59.2 Neurogenic bowel, not elsewhere classified (this code)
• K59.3 Megacolon, not elsewhere classified
• K59.31 Toxic megacolon
• K59.39 Other megacolon
• K59.4 Anal spasm
• K59.8 Other specified functional intestinal disorders