G90.3 vs R03.1
G90.3 (Multi-system degeneration of the autonomic nervous system) compared with R03.1 (Nonspecific low blood-pressure reading), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. R03.1 carries an Excludes1 note covering G90.3: “neurogenic orthostatic hypotension (G90.3)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| G90.3Multi-system degeneration of the autonomic nervous system | R03.1Nonspecific low blood-pressure reading | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Multi-system degeneration of the autonomic nervous system is a billable ICD-10-CM diagnosis code (G90.3). | Nonspecific low blood-pressure reading is a billable ICD-10-CM diagnosis code (R03.1). |
| Includes | Neurogenic orthostatic hypotension [Shy-Drager] | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources