K26 ICD-10-CM Code: Duodenal ulcer
K26 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the digestive system (K00-K95) / Diseases of esophagus, stomach and duodenum (K20-K31)
K26
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceDuodenal ulcer
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for K26. Check the code and parent instructions in the Code Book.
Excludes 2
Official- certain conditions originating in the perinatal period (P04-P96)Inherited from K00-K95, K20-K31
- certain infectious and parasitic diseases (A00-B99)Inherited from K00-K95, K20-K31
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from K00-K95, K20-K31
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Inherited from K00-K95, K20-K31
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from K00-K95, K20-K31
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from K00-K95, K20-K31
- neoplasms (C00-D49)Inherited from K00-K95, K20-K31
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from K00-K95, K20-K31
- hiatus hernia (K44.-)Inherited from K00-K95, K20-K31
Related Codes
Includes
Official- erosion (acute) of duodenum
- duodenum ulcer (peptic)
- postpyloric ulcer (peptic)
Excludes 1
Official- peptic ulcer NOS (K27.-)
Code First
OfficialNo Code First sequencing instructions are included in this display for K26. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify:
- alcohol abuse and dependence (F10.-)
Code Also
OfficialNo Code Also instructions are included in this display for K26. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- K26
- Description
- Duodenal ulcer
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
Get the V28 mapping + MEAT cheat sheet
One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
K26 is the ICD-10-CM diagnosis code for duodenal ulcer. K26 sits in the ICD-10-CM chapter for diseases of the digestive system (k00-k95), within the section covering diseases of esophagus, stomach and duodenum (k20-k31).
K26 is a non-billable category for duodenal ulcer. Move through the official child-code path until the documented detail supports a reportable code.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for K26 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •K26 is a non-billable category for duodenal ulcer. Move through the official child-code path until the documented detail supports a reportable code.
- •For this DOS, capture the provider's current assessment and the care action documented for duodenal ulcer. Keep the checklist tied to the note.
- •Do not swap K26 with K26.0. The FY2026 tabular describes K26.0 as acute duodenal ulcer with hemorrhage. Follow the documented detail.
- •Ask Buddy to show the official notes for K26 or compare its code path with K26.0.
Includes
- erosion (acute) of duodenum
- duodenum ulcer (peptic)
- postpyloric ulcer (peptic)
Excludes 1, Do NOT code together
- peptic ulcer NOS (K27.-)
Use Additional Code
- code to identify:
- alcohol abuse and dependence (F10.-)