K21.9 ICD-10-CA code: Gastro-oesophageal reflux disease without oesophagitis
K21.9 is the ICD-10-CA code for “Gastro-oesophageal reflux disease without oesophagitis” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
K21.9Gastro-oesophageal reflux disease without oesophagitis
Short description: Gastrooesoph reflux dis w/o oesophagitis
ICD-10-CA · Canada · Also written K219
Index terms
Entries in CIHI’s alphabetical index that lead to K21.9. Searching the index by the condition the note names is how coders reach this code.
- Cardiochalasia
- Reflux, esophageal
- Reflux, gastroesophageal
- Chalasia (cardiac sphincter)
- Relaxation, cardioesophageal
Notes for K21.9
As CIHI prints them, with any note K21.9 takes from the headings above it.
Includes
- Oesophageal reflux NOS
Excludes
Conditions classified elsewhere.
- Gastro-oesophageal reflux in the newborn (infant) (P78.81)From K21 Gastro-oesophageal reflux disease
- Hiatus hernia (K44.-)From K20-K31 Diseases of oesophagus, stomach and duodenum
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 11: Diseases of the digestive system (K00-K93)
Where K21.9 sits
- 1ChapterChapter 11: Diseases of the digestive system (K00-K93)
- 2Block K20-K31Diseases of oesophagus, stomach and duodenum
- 3Category K21Gastro-oesophageal reflux disease
- 4Valid code K21.9Gastro-oesophageal reflux disease without oesophagitis
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code K21.9 mean?
K21.9 is the ICD-10-CA code for “Gastro-oesophageal reflux disease without oesophagitis” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is K21.9 in ICD-10-CA?
K21.9 sits under K21 Gastro-oesophageal reflux disease, within K20-K31 Diseases of oesophagus, stomach and duodenum, within Chapter 11: Diseases of the digestive system (K00-K93).
What coding notes apply to K21.9?
ICD-10-CA lists Includes, Excludes notes for K21.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.