Table 2.
Codes from The Danish National Patient Registry to be included in the Danish Registry for Biological Therapy: ICD-10 diagnostic codes used to identify patients with IBD
| Crohn’s disease | K50.0–50.9 | |
| Ulcerative colitis | K51.0–51.9 | |
| IBD unclassified | K51.9, K52.9 | |
| Specific drug coding: | ATC-coding used with procedures: | |
| BOHJ18A1 | Infliximab | L04AA12 or L04AB02 |
| BOHJ18A3 | Adalimumab | L04AA17 or L04AB04 |
| BOHJ18A4 | Golimumab | L04AB06 |
| BOHJ18A5 | Certolizumab pegol | L04AB05 |
| BOHJ26 | Natalizumab | L04AA23 |
| BOHJ19H4 | Vedolizumab | L04AA33 |
| Operation codes | ||
| KJFB00 | Small bowel resection | |
| KJFB01 | Laparoscopic small bowel resection | |
| KJFB20 | Ileocecal resection | |
| KJFB21 | Laparoscopic ileocecal resection | |
| KJFB30 | Right side hemicolectomy | |
| KJFB31 | Laparoscopic right side hemicolectomy | |
| KJFB33 | Other resection of small bowel or colon | |
| KJFB34 | Other laparoscopic resection of small bowel or colon | |
| KJFB40 | Resection of transverse colon | |
| KJFB41 | Laparoscopic resection of transverse colon | |
| KJFB43 | Left side hemicolectomy | |
| KJFB44 | Laparoscopic left side hemicolectomy | |
| KJFB46 | Resection of sigmoid colon | |
| KJFB47 | Laparoscopic resection sigmoid colon | |
| KJFB50 | Other resection of colon | |
| KJFB51 | Other laparoscopic resection of colon | |
| KJFB60 | Resection of sigmoid colon with colostomy | |
| KJFB61 | Laparoscopic resection of sigmoid colon colostomy and distal closure | |
| KJFB63 | Other colon resection colostomy an distal closure | |
| KJFB64 | Other laparoscopic colon resection with colostomy and distal closure | |
| KJFB96 | Other gut resection | |
| KJFB97 | Other laparoscopic gut resection | |
| KJFH00 | Colectomy and ileorectal stoma | |
| KJFH10 | Colectomy and ileostomy | |
| KJFH11 | Laparoscopic colectomy and ileostomy | |
| KJFH20 | Proctocolectomy and ileostomy | |
| KJFH96 | Other colectomy | |
| KJGB00 | Resection of rectum | |
| KJGB01 | Laparoscopic resection of rectum with colorectal or coloanal anastomosis | |
| KJGB10 | Resection of rectum with colostomy | |
| KJGB11 | Laparoscopic resection of rectum with colostomy | |
| KJGB30 | Abdominoperianal resection of rectum | |
| KJGB31 | Laparoscopic and perianal excision of rectum | |
| MRI | ||
| UXMD | MRI of abdomen and pelvis | |
| UXMD10 | MRI of upper abdomen | |
| UXMD15 | MRI of lower abdomen, including pelvis | |
| UXMD20 | MRI of retroperitoneum | |
| UXMD22 | MRI of abdominal wall | |
| UXMD25 | MRI of gastrointestinal tract | |
| UXMD25A | MRI of small bowel | |
| UXMD25B | MRI of colon | |
| CT scan | ||
| UXCD | CT scan of abdomen and pelvis | |
| UXCD00 | CT scan of abdomen | |
| UXCD10 | CT scan of upper abdomen | |
| UXCD15 | CT scan of lower abdomen, including pelvis | |
| Endoscopy | ||
| KUJ | Endoscopy of gastrointestinal tract | |
| KUJC | Esophageal endoscopy | |
| KUJC02 | Esophageal endoscopy | |
| KUJC05 | Esophageal endoscopy with biopsy | |
| KUJC12 | Flexible esophageal endoscopy | |
| KUJC15 | Flexible esophageal endoscopy with biopsy | |
| KUJF32 | Colonoscopy | |
| KUJF35 | Colonoscopy with biopsy | |
| KUJF42 | Sigmoideoscopy | |
| KUJF45 | Sigmoideoscopy with biopsy | |
| KUJF12 | Enteroscopy through stoma | |
| KUJF15 | Enteroscopy through stoma with biopsy | |
| KUJF92 | Capsule enteroscopy | |
| KUJF82 | Double balloon endoscopy | |
| KUJF85 | Double balloon endoscopy with biopsy | |
| Chest X-ray | ||
| UXRC00 | X-ray of chest | |
| UXRC05 | X-ray of chest | |
| Abdominal X-ray | ||
| UXRD | Abdominal X-ray | |
| UXRD15 | Small bowel follow-through | |
| UXRD20 | Small bowel follow-through with contrast in tube | |
| UXRD35 | Pouchografi | |
| UXZ16 | Fistulography | |
Notes: Treatment codes used to identify eligible patients with IBD. Codes used for surgery, radiology, and endoscopic procedures.
Abbreviations: ATC, anatomical therapeutical chemical classification; CT, computed tomography; IBD, inflammatory bowel disease; ICD, The International Classification of Diseases; MRI, magnetic resonance imaging.