Acute Appendicitis

Coding system
CTV3 (Read V3)
Coding system release
Codelist ID
Version Tag
Version ID

  • 2020-09-23


Codes that indicate an episode of acute appendicitis


These codes were mapped first in snomed using the opencodelist builder. The search terms used were:

  • appendicitis
  • appendix
  • appendicectomy

The codes were discussed by 3 practicing doctors. A summary of this discussion is available on the github issue below. The main points were:

  • codes indicating chronic or recurrent appendicitis were removed
  • codes indicating a specific cause of appendicitis such as in relation to Crohns disease or amoebic were removed
  • codes indicating length of appendix as a specimen after surgery were kept.

These codes were mapped to CTV3 and rechecked. Some extinct codes were found during this mapping and removed.

The final codelist was signed off by the 3 clinicians indicated below.


Signed off by

  • Caroline Morton, (Sept. 23, 2020)
  • Laurie Tomlinson, (Sept. 23, 2020)
  • Sinéad langan, (Sept. 23, 2020)

Codelists are developed by a broad community of users for individual study purposes, which may or may not meet the needs of other studies. They should not be thought of as universal definitions of a particular condition.

We don't offer any guarantees about what they do or don't identify. Users should carefully check that any codelist meets their needs, and seek clinical input where appropriate.

CTV3Code CTV3PreferredTermDesc
J20.. Acute appendicitis
J20z. Acute appendicitis NOS
XE0aV Acute appendicitis with appendix abscess
XaYaL Acute appendicitis with generalised peritonitis
XaYaN Acute appendicitis with localised peritonitis
J200. Acute appendicitis with peritonitis
J202. Acute appendicitis without peritonitis
X304K Acute focal appendicitis
J20z1 Acute gangrenous appendicitis
Xa3fg Acute perforated appendicitis
X304L Acute suppurative appendicitis
Xa9C4 Appendicitis
XaB9A Appendicitis NOS
J21.. Appendicitis, unqualified
X304N Appendix abscess
J201. Appendix abscess (& [acute appendicitis])
XA08g Delayed perforation of appendix
77020 Drainage of appendix abscess
7700. Emergency appendicectomy
77003 Emergency appendicectomy NEC
77001 Emergency excision of abnormal appendix NEC
7700z Emergency excision of appendix NOS
77002 Emergency excision of normal appendix
77014 Endoscopic appendicectomy NEC
X20X1 Inversion appendicectomy
Xa9w5 Laparoscopic appendicectomy
77004 Laparoscopic emergency appendicectomy
XaBAT Laparoscopic interval appendicectomy
J22.. Other appendicitis
J22z. Other appendicitis NOS
XA08f Perforation of appendix
J220. Subacute appendicitis
Jyu20 [X]Other appendicitis

Codes not in the full codelist are in faint grey.