FY2027
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Excludes1 pair

G90.3 vs I95.1

G90.3 and I95.1 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 G90.3
orthostatic hypotension NOS (I95.1)
G90.3

Multi-system degeneration of the autonomic nervous system

Billable
Chapter 6
Diseases of the nervous system
Section
G89-G99
Use when the record says
  • Neurogenic orthostatic hypotension [Shy-Drager]
Indexed under
  • Shy-Drager syndrome
  • Degeneration, degenerative › multi-system
  • Hypotension › neurogenic, orthostatic
  • Parkinsonism › with neurogenic orthostatic hypotension (symptomatic)
  • Hypotension › orthostatic › neurogenic
I95.1

Orthostatic hypotension

Billable
Chapter 9
Diseases of the circulatory system
Section
I95-I99
Use when the record says
  • Hypotension, postural
Indexed under
  • Hypotension › orthostatic (chronic)
  • Hypotension › postural

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