- K21.00 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM K21.00 became effective on October 1, 2022.
- This is the American ICD-10-CM version of K21.00 – other international versions of ICD-10 K21.00 may differ.
ICD-10-CM K21.00 is grouped within Diagnostic Related Group(s):
- 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
- 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc
Applicable To
- Reflux esophagitis
Code History
- 2021 (effective 10/1/2020): New code
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to K21.00:
- with esophagitis (without bleeding) > gastroesophageal reflux K21.9
- with esophagitis (without bleeding) > gastroesophageal reflux (GERD) K21.9
- due to gastrointestinal reflux disease (without bleeding) > Esophagitis (acute) (alkaline) (chemical) (chronic) (infectional) (necrotic) (peptic) (postoperative) (without bleeding) K20.90
- reflux > Esophagitis (acute) (alkaline) (chemical) (chronic) (infectional) (necrotic) (peptic) (postoperative) (without bleeding) K20.90
- with esophagitis (without bleeding) > esophageal K21.9
- with esophagitis (without bleeding) > gastroesophageal K21.9
- gastrointestinal reflux disease (without bleeding) > due to K22.10