K21.9 diagnosis code · Billable code · FY2027
K21.9 Gastro-esophageal reflux disease without esophagitis
- Billable
- Not CC/MCC
- POA reported
K21.9 ICD-10 code: a billable diagnosis code in FY2027, one of 3 billable codes in category K21.
ICD-10 code by name
- What is the ICD-10 code for acid reflux?
- Acid reflux ICD-10 code: K21.9 Gastro-esophageal reflux disease without esophagitis. Alphabetic Index: Reflux›acid → K21.9. Search ICD-10 for acid reflux
- What is the ICD-10 code for gastroesophageal reflux disease?
- Gastroesophageal reflux disease ICD-10 code: K21.9 Gastro-esophageal reflux disease without esophagitis. Alphabetic Index: Disease, diseased›gastroesophageal reflux (GERD) → K21.9. Search ICD-10 for gastroesophageal reflux disease
- What is the ICD-10 code for reflux?
- Reflux ICD-10 code: K21.9 Gastro-esophageal reflux disease without esophagitis. Alphabetic Index: Reflux → K21.9. Search ICD-10 for reflux
Where it sits
- Chapter 11 Diseases of the digestive system (K00-K95)
- K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)
- K21 Gastro-esophageal reflux disease
- K21.9 Gastro-esophageal reflux disease without esophagitis
- CC / MCC
- Neither
- MS-DRG
- 391-392
- HCC V28
- –
- POA
- Reported
- Code Editor
- –
- Index entries
- 10
Instructions
At K21.9
Inclusion terms
- Esophageal reflux NOS
Notes that also apply
Block K20-K31 instructions (Excludes2 1): printed on the block page.
Chapter 11 instructions (Excludes2 8): printed on the chapter 11 page.
Index entries
- Cardiochalasia → K21.9
- Chalasia (cardiac sphincter) → K21.9
- GERD (gastroesophageal reflux disease) → K21.9
- Reflux → K21.9
- Disease, diseased›gastroesophageal reflux (GERD) → K21.9
- Reflux›acid → K21.9
- Reflux›esophageal → K21.9
- Reflux›gastroesophageal → K21.9
- Relaxation›cardioesophageal → K21.9
- Allergy, allergic (reaction) (to)›milk protein›gastroesophageal reflux → K21.9
NCHS Alphabetic Index. Index first, then the Tabular List.
Medicare grouping and edits
| CC / MCC | Neither |
|---|---|
| Appendix B | MDC 06 Diseases and Disorders of the Digestive System, MS-DRG 391-392 (Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC…) |
| Code Editor | – |
| POA | Reported |
| HCC V28 | – |
CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.