Errol Olwyn Grannum, MD

Ophthalmologist in Brownsville, Texas · NPI 1508897935

Errol Grannum is one of 8 ophthalmologists practicing in Brownsville, Texas. Errol Grannum practices with Alexander P. Sudarshan MD PA.

Registry record (NPPES)

NPI
1508897935
Type
Type 1 · Individual
Primary taxonomy
Ophthalmology · 207W00000X
Address on file
1910 S 1st St
McAllen, TX 78503-1255
(956) 687-3937
Enumerated
Jul 5, 2006
Record last updated
Jul 8, 2007
License states listed
TX

Medicare (CMS)

Enrollment
Medicare-enrolled in TX
Ophthalmology
Revalidation due
No date set by CMS

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Practice locations

More ophthalmologists in Brownsville

Updated August 2026. Practice locations and specialty come from the CMS Doctors and Clinicians file, the registry record from NPPES, and enrollment from CMS Medicare enrollment files. NPI records are corrected at the source, through NPPES.