G52 vs H49.0

G52 (Disorders of other cranial nerves) compared with H49.0 (Third [oculomotor] nerve palsy), 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. G52 carries an Excludes2 note covering H49.0: “paralytic strabismus due to nerve palsy (H49.0-H49.2)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	G52Disorders of other cranial nerves	H49.0Third [oculomotor] nerve palsy
Billing status	Non-billable header Report instead: G52.0, G52.1, G52.2, G52.3, G52.7	Non-billable header Report instead: H49.00, H49.01, H49.02, H49.03
Classification	G00-G99 — Diseases of the Nervous System (G00-G99)	H00-H59 — Diseases of the Eye and Adnexa (H00-H59)
Definition	Disorders of other cranial nerves is a non-billable ICD-10-CM category code (G52).	Third [oculomotor] nerve palsy is a non-billable ICD-10-CM category code (H49.0).

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources