What is the ICD-10 code for Esophagitis?

The ICD-10-CM code for Esophagitis is K20 (fiscal year 2026). K20 is a non-billable category code — a more specific code such as K20.0 is required for claims.

What does ICD-10 code K20 mean?

K20 is the ICD-10-CM diagnosis code for Esophagitis. Esophagitis

Is K20 a billable ICD-10 code?

No, K20 is not a billable code. You may need to select a more specific code from this category.

What chapter is K20 in?

K20 is classified under Chapter 11: Diseases of the digestive system (K00-K95), Section K20-K31: Diseases of esophagus, stomach and duodenum (K20-K31).

What are the includes and excludes for K20?

Excludes1 (not coded here): erosion of esophagus (K22.1-); esophagitis with gastro-esophageal reflux disease (K21.0-); reflux esophagitis (K21.0-). Excludes2 (not included here): eosinophilic gastritis or gastroenteritis (K52.81).

What more specific codes exist under K20?

More specific codes under K20 include: K20.0, K20.8, K20.80, K20.81, K20.9. Select the most specific code that matches the clinical documentation.

K20 Esophagitis

⚠ Non-Billable ICD-10-CM 2026

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The ICD-10-CM code for Esophagitis is K20 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter: 11: Diseases of the digestive system (K00-K95)
Section: K20-K31: Diseases of esophagus, stomach and duodenum (K20-K31)
Category K20: 8 codes (5 billable)
FY2026 Status: Stable since FY2024

Excludes1

Not coded here. These conditions should NOT be coded together with K20.

erosion of esophagus (K22.1-)
esophagitis with gastro-esophageal reflux disease (K21.0-)
reflux esophagitis (K21.0-)
ulcerative esophagitis (K22.1-)

Excludes2

Not included here. These conditions are coded elsewhere but may be coded together if applicable.

eosinophilic gastritis or gastroenteritis (K52.81)

Use Additional Code

code to identify:
alcohol abuse and dependence (F10.-)

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

K20 Esophagitis

Classification

Official Coding Guidelines

References

Related Codes

More Specific Codes

Related Codes in K20

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