1910 S 1st St · McAllen · TX

Errol O Grannum

Ophthalmologist (MD/DO)NPI Registry record

Address1910 S 1st St, Suite 400, McAllen 78503
HoursCall to confirm
Vision insuranceNot yet confirmed — ask the practice
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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.

NPPES / NPI Registry — eye-care organizations ↗Checked Aug 26, 2026
Google Business ProfileChecked Aug 26, 2026

Care at this practice

Provider type

Ophthalmologist (MD/DO)

Associations come from state records and the practice's own website — confirm specific services and coverage 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.

Eye doctors at this practice

Practitioner details are being verified.

No clinician is shown without an active credential backed by an authoritative record.

Visit details

Address1910 S 1st St, Suite 400, McAllen 78503
Phone956-687-3937

Before you book

Confirm they accept your vision plan
Ask whether they're taking new patients
Bring your current glasses or contacts prescription

NPI Registry record: NPPES / NPI Registry — eye-care organizations. Service and coverage labels name their source when relationship evidence is available. Confirm coverage with your plan before booking.

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About this practice

How this profile is checked

Care at this practice

Provider type

Common questions

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