Reserved for future guideline expansion
K58.9
Irritable bowel syndrome, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 4 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 8 never code together
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 3
Official Guidelines 1 names this code
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Index entries leading here 6
- Syndrome — see also Disease
- irritable
- bowel K58.9
- irritable
- Irritable, irritability R45.4
- Colic (bilious) (infantile) (intestinal) (recurrent) (spasmodic) R10.83
- mucous K58.9
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9
- spastic K58.9
- Spasm (s) , spastic, spasticity R25.2
- Hypermobility, hypermotility
Alongside this code 4 same parent — K58
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.