ICD-10-CM K26 is the diagnosis code for Duodenal ulcer. 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 non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as K26. They are mutually exclusive:
Understanding where K26 sits in the ICD-10-CM classification helps ensure proper coding:
No, K26 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
K26 is the ICD-10-CM diagnosis code for "Duodenal ulcer". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
K26 is located in Section K20-K31 — "Diseases of esophagus, stomach and duodenum" within Chapter 11 of the ICD-10-CM Tabular List.
K26 has 9 sub-code(s) that provide more specific detail: K26.0, K26.1, K26.2, K26.3, K26.4 and more.
Use K26 when the patients documented diagnosis matches "Duodenal ulcer" 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 Duodenal ulcer is K26.
No, K26 is non-billable. Use a more specific sub-code for primary diagnosis billing.
K26 is in Chapter 11 of the ICD-10-CM Tabular List.
Type 1 Excludes for K26 include: peptic ulcer NOS (K27.-).
Yes, K26 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.