Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Errol O Grannum

Organization Ophthalmology Physician · NPI 1457377194

Errol O Grannum is an Ophthalmology Physician in McAllen, Texas. Licensed in Texas. Registered with an NPI since 2006.

Licensed in
TX
In the registry since
2006

Practice location Address checks out

1910 S 1st St Ste 400
McAllen, TX 78503-1255
Phone: (956) 687-3937
Fax: (956) 687-3938
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence K5972 (TX)

Record details

NPI number1457377194
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Errol Grannum — Owner · (956) 687-3937
NPI enumeratedJuly 14, 2006
Last updated in NPPESAugust 22, 2020
Mailing address1910 S 1st St, Suite 400, McAllen, TX 78503-1255

Other providers in McAllen