K59.4 Anal spasm

Billable ICD-10-CM code, FY2026.

Applicable to

• Proctalgia fugax

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)

• 564.6 Anal spasm

Diagnosis Index entries for K59.4

• Proctalgia › fugax
• Proctalgia › spasmodic
• Proctospasm
• Spasm (s), spastic, spasticity › anus, ani (sphincter) (reflex)
• Spasm (s), spastic, spasticity › rectum (sphincter)

Nearby codes

• K59.1 Functional diarrhea
• K59.2 Neurogenic bowel, not elsewhere classified
• K59.3 Megacolon, not elsewhere classified
• K59.31 Toxic megacolon
• K59.39 Other megacolon
• K59.4 Anal spasm (this code)
• K59.8 Other specified functional intestinal disorders
• K59.81 Ogilvie syndrome
• K59.89 Other specified functional intestinal disorders
• K59.9 Functional intestinal disorder, unspecified