K20.9Header code — not billable

Esophagitis, unspecified

Chapter
11. Diseases of the digestive system
Category
K20
Effective date
October 1, 2026

Related codes in category K20

K20EsophagitisK20.0Eosinophilic esophagitisYesK20.8Other esophagitisK20.80Other esophagitis without bleedingYesK20.81Other esophagitis with bleedingYesK20.90Esophagitis, unspecified without bleedingYesK20.91Esophagitis, unspecified with bleedingYes

Frequently asked questions

What is ICD-10 code K20.9?

K20.9 is an ICD-10-CM diagnosis code for Esophagitis, unspecified.

Is K20.9 a billable code?

No. K20.9 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is K20.9 in?

K20.9 falls under Chapter 11: Diseases of the digestive system.

When did K20.9 become effective?

K20.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to K20.9?

K20.9 belongs to category K20, which includes 7 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.