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Compare/H49 vs H52.51

H49 vs H52.51

H49 (Paralytic strabismus) compared with H52.51 (Internal ophthalmoplegia (complete) (total)), 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 H52.51: “internal ophthalmoplegia (H52.51-)”

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

Side by side

H49Paralytic strabismusH52.51Internal ophthalmoplegia (complete) (total)
Billing statusNon-billable header

Report instead: H49.00, H49.01, H49.02, H49.03, H49.10

Non-billable header

Report instead: H52.511, H52.512, H52.513, H52.519

ClassificationH00-H59 — Diseases of the Eye and Adnexa (H00-H59)H00-H59 — Diseases of the Eye and Adnexa (H00-H59)
DefinitionParalytic strabismus is a non-billable ICD-10-CM category code (H49).Internal ophthalmoplegia (complete) (total) is a non-billable ICD-10-CM category code (H52.51).
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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