Gastro-esophageal reflux disease - K21
Excludes1: It indicates that the conditions described by two codes cannot occur together in the same patient. These codes are mutually exclusive.
Type 1 Excludes:
- newborn esophageal reflux (P78.83)
These ranges represents subcategories of Gastro-esophageal reflux disease. The "K21" signifies that these are the diseases within this broad category.