ICDwise
K00–K95

Diseases of the Digestive System

GERD, IBS, liver disease, appendicitis

1,109 codes · FY2026 · ICD-10-CM · Page 15 of 23

K59.02 Outlet dysfunction constipation Billable K59.03 Drug induced constipation Billable K59.04 Chronic idiopathic constipation Billable K59.09 Other constipation Billable K59.1 Functional diarrhea Billable K59.2 Neurogenic bowel, not elsewhere classified Billable K59.3 Megacolon, not elsewhere classified Non-billable K59.31 Toxic megacolon Billable K59.39 Other megacolon Billable K59.4 Anal spasm Billable K59.8 Other specified functional intestinal disorders Non-billable K59.81 Ogilvie syndrome Billable K59.89 Other specified functional intestinal disorders Billable K59.9 Functional intestinal disorder, unspecified Billable K60 Fissure and fistula of anal and rectal regions Non-billable K60.0 Acute anal fissure Billable K60.1 Chronic anal fissure Billable K60.2 Anal fissure, unspecified Billable K60.3 Anal fistula Non-billable K60.30 Anal fistula, unspecified Billable K60.31 Anal fistula, simple Non-billable K60.311 Anal fistula, simple, initial Billable K60.312 Anal fistula, simple, persistent Billable K60.313 Anal fistula, simple, recurrent Billable K60.319 Anal fistula, simple, unspecified Billable K60.32 Anal fistula, complex Non-billable K60.321 Anal fistula, complex, initial Billable K60.322 Anal fistula, complex, persistent Billable K60.323 Anal fistula, complex, recurrent Billable K60.329 Anal fistula, complex, unspecified Billable K60.4 Rectal fistula Non-billable K60.40 Rectal fistula, unspecified Billable K60.41 Rectal fistula, simple Non-billable K60.411 Rectal fistula, simple, initial Billable K60.412 Rectal fistula, simple, persistent Billable K60.413 Rectal fistula, simple, recurrent Billable K60.419 Rectal fistula, simple, unspecified Billable K60.42 Rectal fistula, complex Non-billable K60.421 Rectal fistula, complex, initial Billable K60.422 Rectal fistula, complex, persistent Billable K60.423 Rectal fistula, complex, recurrent Billable K60.429 Rectal fistula, complex, unspecified Billable K60.5 Anorectal fistula Non-billable K60.50 Anorectal fistula, unspecified Billable K60.51 Anorectal fistula, simple Non-billable K60.511 Anorectal fistula, simple, initial Billable K60.512 Anorectal fistula, simple, persistent Billable K60.513 Anorectal fistula, simple, recurrent Billable K60.519 Anorectal fistula, simple, unspecified Billable K60.52 Anorectal fistula, complex Non-billable

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