K38.3 Fistula of appendix

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 393-395 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 543.9 Other and unspecified diseases of appendix (approximate)

Code annotations containing back-references to K38.3

Back-references to K38.3

• Type 2 Excludes: K63.2 Fistula of intestine ("fistula of appendix (K38.3)")

Diagnosis Index entries for K38.3

• Fistula (cutaneous) › appendix, appendicular

Nearby codes

• K38 Other diseases of appendix
• K38.0 Hyperplasia of appendix
• K38.1 Appendicular concretions
• K38.2 Diverticulum of appendix
• K38.3 Fistula of appendix (this code)
• K38.8 Other specified diseases of appendix
• K38.9 Disease of appendix, unspecified