colitis indeterminate colitis ICD9:558.9 EFO:1000034 UMLS:C0341332 MEDGEN:87418 It describes patients in whom a diagnosis of ulcerative colitis or Crohn's disease cannot be made based on standard clinical testing, including colonoscopy, imaging, laboratory tests, and biopsy. NCIT:C27110 ICD10CM:K52.3 SCTID:235746007 colitis of indeterminate type MONDO:0006038 icd11.foundation:553916326