Billable / Specific Code
ICD-10-CM K21.9 is the diagnosis code for Gastro-esophageal reflux disease without esophagitis. This code falls under the section "Diseases of esophagus, stomach and duodenum" within Chapter 11 — Diseases of the digestive system (K00-K95). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where K21.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, K21.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
K21.9 is the ICD-10-CM diagnosis code for "Gastro-esophageal reflux disease without esophagitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of K21.9 is K21 ("Gastro-esophageal reflux disease"). K21.9 provides a more specific classification within this category.
K21.9 is located in Section K20-K31 — "Diseases of esophagus, stomach and duodenum" within Chapter 11 of the ICD-10-CM Tabular List.
Use K21.9 when the patients documented diagnosis matches "Gastro-esophageal reflux disease without esophagitis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Gastro-esophageal reflux disease without esophagitis is K21.9.
Yes, K21.9 can be used as a primary diagnosis code since it is billable and specific.
K21.9 is in Chapter 11 of the ICD-10-CM Tabular List.
Yes, K21.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.