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ICD-10-CM Codes
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K00-K95
Diseases of the digestive system
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K20-K31
Diseases of esophagus, stomach and duodenum
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K21-
Gastro-esophageal reflux disease
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2022 ICD-10-CM Diagnosis Code K21.00
2022 ICD-10-CM Diagnosis Code K21.00
Gastro-esophageal reflux disease with esophagitis, without bleeding
2021 - New Code 2022 Billable/Specific Code
- K21.00 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- Short description: Gastro-esophageal reflux dis with esophagitis, without bleed
- The 2022 edition of ICD-10-CM K21.00 became effective on October 1, 2021.
- This is the American ICD-10-CM version of K21.00 - other international versions of ICD-10 K21.00 may differ.
The following code(s) above
K21.00 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
K21.00:
- K00-K95
2022 ICD-10-CM Range K00-K95
Diseases of the digestive systemType 2 Excludes- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Diseases of the digestive system - K20-K31
2022 ICD-10-CM Range K20-K31
Diseases of esophagus, stomach and duodenum
Diseases of esophagus, stomach and duodenum - K21
ICD-10-CM Diagnosis Code K21
Gastro-esophageal reflux disease
2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
Type 1 Excludes- newborn esophageal reflux (P78.83)
Gastro-esophageal reflux disease
ICD-10-CM K21.00 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
- 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
- 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc
Code History
- 2021 (effective 10/1/2020): New code
- 2022 (effective 10/1/2021): No change
- Allergy, allergic (reaction) (to) T78.40
ICD-10-CM Diagnosis Code T78.40
Allergy, unspecified
2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
Applicable To- Allergic reaction NOS
- Hypersensitivity NOS
- milk protein Z91.011 - see also Allergy, food
ICD-10-CM Diagnosis Code Z91.011
Allergy to milk products
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
Type 1 Excludes- lactose intolerance (E73.-)
- Disease, diseased - see also Syndrome
- gastroesophageal reflux (GERD) K21.9
ICD-10-CM Diagnosis Code K21.9
Gastro-esophageal reflux disease without esophagitis
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
- Esophagitis (acute) (alkaline) (chemical) (chronic) (infectional) (necrotic) (peptic) (postoperative) (without bleeding) K20.90
ICD-10-CM Diagnosis Code K20.90
Esophagitis, unspecified without bleeding
2021 - New Code 2022 Billable/Specific Code
- Reflux K21.9
ICD-10-CM Diagnosis Code K21.9
Gastro-esophageal reflux disease without esophagitis
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
- esophageal K21.9
ICD-10-CM Diagnosis Code K21.9
Gastro-esophageal reflux disease without esophagitis
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
- gastroesophageal K21.9
ICD-10-CM Diagnosis Code K21.9
Gastro-esophageal reflux disease without esophagitis
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- esophagus (peptic) K22.10
ICD-10-CM Diagnosis Code K22.10
Ulcer of esophagus without bleeding
2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
ICD-10-CM Codes Adjacent To K21.00
K20.0 Eosinophilic esophagitis
K20.9 Esophagitis, unspecified
K21 Gastro-esophageal reflux disease
K21.0 Gastro-esophageal reflux disease with esophagitis
K21.00
…… without bleeding
K21.9 Gastro-esophageal reflux disease without esophagitis
K22 Other diseases of esophagus
K22.0 Achalasia of cardia
K22.2 Esophageal obstruction
K22.3 Perforation of esophagus
K22.4 Dyskinesia of esophagus
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.