K58.9Billable

Irritable bowel syndrome, unspecified

Chapter
11. Diseases of the digestive system
Category
K58
Effective date
October 1, 2026

Related codes in category K58

K58Irritable bowel syndromeK58.0Irritable bowel syndrome with diarrheaYesK58.1Irritable bowel syndrome with constipationYesK58.2Mixed irritable bowel syndromeYesK58.8Other irritable bowel syndromeYes

Frequently asked questions

What is ICD-10 code K58.9?

K58.9 is an ICD-10-CM diagnosis code for Irritable bowel syndrome, unspecified.

Is K58.9 a billable code?

Yes. K58.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is K58.9 in?

K58.9 falls under Chapter 11: Diseases of the digestive system.

When did K58.9 become effective?

K58.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to K58.9?

K58.9 belongs to category K58, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.