K20 ICD-10-CM Code: Esophagitis
A clear reference for the official code description, hierarchy, and related coding information from the April 2026 U.S. release.
Code definition
Official description
K20Esophagitis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where K20 sits
- 1
Chapter 11
Diseases of the digestive system (K00-K95)
- 2
Section
Diseases of esophagus, stomach and duodenum (K20-K31)
- 3
Category K20
Esophagitis
- 4
Code K20
Esophagitis
More specific choices
Codes under K20
K20 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for K20.
Code first
No “code first” instruction is listed for K20.
Use additional code
No “use additional code” instruction is listed for K20.
Excludes1
Conditions that should not be reported together with this code.
- erosion of esophagus (K22.1-)
- esophagitis with gastro-esophageal reflux disease (K21.0-)
- reflux esophagitis (K21.0-)
- ulcerative esophagitis (K22.1-)
Excludes2
Conditions not included here that may be reported separately when present.
- eosinophilic gastritis or gastroenteritis (K52.81)
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code K20 mean?
K20 is the April 2026 U.S. ICD-10-CM code for “Esophagitis.”
Is K20 a billable or specific ICD-10-CM code?
No. K20 has more specific child codes in the April 2026 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is K20 located in ICD-10-CM?
K20 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Diseases of esophagus, stomach and duodenum (K20-K31) (K20–K31), under category K20, Esophagitis.
What coding notes are listed for K20?
No inclusion terms are listed for K20 in this reference record. No code-first instruction is listed. Excludes1 notes: erosion of esophagus (K22.1-); esophagitis with gastro-esophageal reflux disease (K21.0-); reflux esophagitis (K21.0-); ulcerative esophagitis (K22.1-). Excludes2 notes: eosinophilic gastritis or gastroenteritis (K52.81).
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