Excludes1 pair

G83.2- vs I69-

G83.2 and I69 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 G83.2

monoplegia of upper limbs due to sequela of cerebrovascular disease (I69.03-, I69.13-, I69.23-, I69.33-, I69.83-, I69.93-)

G83.2

Monoplegia of upper limb

Not billable

Chapter 6: Diseases of the nervous system
Section: G80-G83

Use when the record says

Paralysis of upper limb

Indexed under

Monoplegia › upper limb

I69

Sequelae of cerebrovascular disease

Not billable

Chapter 9: Diseases of the circulatory system
Section: I60-I69

These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.

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