---
title: "ICD-10-CM K21.9: Gastro-esophageal reflux disease without… | BillingBrief"
description: "ICD-10-CM code K21.9: Gastro-esophageal reflux disease without esophagitis. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/k21.9/"
language: "en"
---

# K21.9 Gastro-esophageal reflux disease without esophagitis

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Gastro-esophageal reflux disease without esophagitis

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Also covers

-   Esophageal reflux NOS

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   newborn esophageal reflux (P78.83)

### Excludes2

Not part of this code, but both can be coded when both are documented.

-   hiatus hernia (K44.-)

## Related codes

-   [`K21.00` Gastro-esophageal reflux disease with esophagitis, without bleeding ICD-10-CM](https://billingbrief.com/icd10/k21.00/)
-   [`K21.01` Gastro-esophageal reflux disease with esophagitis, with bleeding ICD-10-CM](https://billingbrief.com/icd10/k21.01/)

## Common questions

### Is K21.9 a billable code?

Yes. K21.9 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

K21 Gastro-esophageal reflux disease

Chapter

Diseases of the digestive system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).