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1910 S 1st St · McAllen · TX

Errol O Grannum

Ophthalmologist (MD/DO)NPI record matched

Identity and provider type matched to the federal NPI Registry. This does not confirm current licensure, services, hours, or vision-plan participation. Checked Aug 26, 2026.

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  • Address1910 S 1st St, Suite 400, McAllen 78503
  • HoursCall to confirm
  • Vision insuranceNo source-reported plan information
  • Own this practice?Claim this profile

About this practice

Errol O Grannum is a eye care practice in McAllen, Texas. Its profile is linked to NPPES / NPI Registry — eye-care organizations. Source records associate it with ophthalmologist (md/do).

Generated from the source-backed fields shown on this profile.

How this profile is checked

Last verified: Aug 26, 2026

We separate licensing and federal registry evidence from practice-reported services, plan participation, and Google business information.

Care at this practice

Provider type

Ophthalmologist (MD/DO)

Each label is published only when supporting source evidence is available. Confirm current services and plan participation before booking.

Common questions

Where is Errol O Grannum located?

Errol O Grannum is located at 1910 S 1st St, McAllen, TX, 78503.

What care is Errol O Grannum associated with?

NPPES / NPI Registry — eye-care organizations associate Errol O Grannum with: Ophthalmologist (MD/DO). Confirm current services with the practice directly.

How do I contact Errol O Grannum?

Call 956-687-3937.

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