FY2027
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Excludes1 pair

D18.1 vs D36.0

D18.1 and D36.0 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 D36.0
lymphangioma (D18.1)
D18.1

Lymphangioma, any site

Billable
Chapter 2
Neoplasms
Section
D10-D36
Indexed under
  • Hemolymphangioma
  • Hygroma (congenital) (cystic)
  • Lymphangioendothelioma
  • Lymphangioma
  • Lymphangiomyoma
D36.0

Benign neoplasm of lymph nodes

Billable
Chapter 2
Neoplasms
Section
D10-D36

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