G23.1 vs H49
G23.1 (Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]) compared with H49 (Paralytic strabismus), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. H49 carries an Excludes2 note covering G23.1: “progressive supranuclear ophthalmoplegia (G23.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| G23.1Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] | H49Paralytic strabismus | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | H00-H59 — Diseases of the Eye and Adnexa (H00-H59) |
| Definition | Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] is a billable ICD-10-CM diagnosis code (G23.1). | Paralytic strabismus is a non-billable ICD-10-CM category code (H49). |
| Includes | Progressive supranuclear palsy | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources