ICD-10 Code for Irritable
The ICD-10-CM code for irritable is R45.4 — Irritability and anger. This is the code the Alphabetic Index gives for irritable with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
Billable
Which irritable code should you use?
The Alphabetic Index lists 14 codes under Irritable, irritability. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| bladder | N32.89 | Other specified disorders of bladder | |
| bowel | K58.9 | Irritable bowel syndrome, unspecified | |
| without diarrhea | K58.9 | Irritable bowel syndrome, unspecified | |
| cerebral, in newborn | P91.3 | Neonatal cerebral irritability | |
| colon | K58.9 | Irritable bowel syndrome, unspecified | |
| duodenum | K59.89 | Other specified functional intestinal disorders | |
| heart | F45.8 | Other somatoform disorders | |
| ileum | K59.89 | Other specified functional intestinal disorders | |
| infant | R68.12 | Fussy infant (baby) | |
| jejunum | K59.89 | Other specified functional intestinal disorders | |
| rectum | K59.89 | Other specified functional intestinal disorders | |
| stomach | K31.89 | Other diseases of stomach and duodenum | |
| sympathetic | G90.89 | Other disorders of autonomic nervous system | |
| urethra | N36.8 | Other specified disorders of urethra |
Irritable bowel
Irritable colon
Irritable stomach
| psychogenic | F45.8 | Other somatoform disorders |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources