FY2027
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Excludes1 pair

D13- vs D21.4

D13 and D21.4 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on D13
benign stromal tumors of digestive system (D21.4)
D13

Benign neoplasm of other and ill-defined parts of digestive system

Not billable
Chapter 2
Neoplasms
Section
D10-D36
D21.4

Benign neoplasm of connective and other soft tissue of abdomen

Billable
Chapter 2
Neoplasms
Section
D10-D36
Use when the record says
  • Benign stromal tumors of abdomen
Indexed under
  • Tumor › stromal › gastric › benign
  • Tumor › stromal › gastrointestinal › benign
  • Tumor › stromal › intestine › benign
  • Tumor › stromal › stomach › benign

Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027