ICD-10-CM › K00-K95 › K20-K31 › K21 Gastro-esophageal reflux disease › K21.9
Gastro-esophageal reflux disease without esophagitis
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Gastro-esophageal reflux disease without esophagitis
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from K21 Gastro-esophageal reflux disease
Excludes1 - never coded here
- newborn esophageal reflux (P78.83)
Inherited from the K20-K31 section Diseases of esophagus, stomach and duodenum (K20-K31)
Excludes2 - not included here
- hiatus hernia (K44.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- gerd
- acid reflux
- GERD
- Backflow
- Lax, laxity
- Disorder > allergic
- Hypersusceptibility
- Reaction > allergic
- Sensitive, sensitivity
- Postnasal drip > due to > gastroesophageal reflux
- Drip, postnasal > due to > gastroesophageal reflux
- Hypersensitive, hypersensitiveness, hypersensitivity
- GERD
- Reflux
- Chalasia
- Reflux > acid
- Cardiochalasia
- Reflux > esophageal
- Reflux > gastroesophageal
- Relaxation > cardioesophageal
- Disease, diseased > gastroesophageal reflux
- Allergy, allergic > milk protein > gastroesophageal reflux
Codes in the same group
| Code | Description | Status |
|---|---|---|
| K21.0 | Gastro-esophageal reflux disease with esophagitis | Not billable |