4.3
17 Ratings with 3 written Reviews
Summary
Dr. Errol Grannum treats diabetic retinopathy, diabetic eye disease, and glaucoma, and performs retinal imaging and dilated eye exams as part of his ophthalmology practice. He has practiced ophthalmology for 33 years and is affiliated with DHR Health Edinburg. Dr. Grannum earned his medical degree from Yale University School of Medicine and sees patients in McAllen, Texas. He speaks English and Spanish. Patients on Vitals rate Dr. Grannum 4.35 out of 5.
Overview based on verified provider data
Quick Facts
- 33 years of experience
- 33 insurance plans accepted
- speaks English, Spanish
- Yale University School Of Medicine
- 3 written reviews
- 1 specialty
- 9 areas of expertise
- 1 hospital affiliation
- 1 office location
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Location
Compare with Similar Doctors
 |  |  | |
| Dr. Errol Olwyn Grannum, MD | Sandip Suresh, MD | Dr. Humair Khan, MD | Dr. Richard La Mar Gillett II, MD |
| Ophthalmology | Ophthalmology | Ophthalmology | Ophthalmology |
| Accepts New Patients | Accepts New Patients | ||
| 33 Years of Experience | 14 Years of Experience | 47 Years of Experience | |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | No Virtual Visit Option |
| Speaks English, Spanish | Speaks English | Speaks English | Speaks English, Spanish |
| McAllen , TX | Webster , TX | Webster , TX | Edinburg , TX |
| Med School: Yale University School Of Medicine | Med School: University of Minnesota | Med School: Baylor College of Medicine | Med School: David Geffen School Of Medicine At Ucla |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Errol Olwyn Grannum
Medical Specialties
Dr. Errol Olwyn Grannum has the following specialty
Specialty Expertise
Dr. Errol Olwyn Grannum has the following 9 areas of expertise
Certifications, License, & Education
33 Years Experience
Dr. Errol Olwyn Grannum holds an expired medical license in the state of Texas.
Medical License
Medical Doctor with an expired medical license in the state of Texas that expired in 2026.
Education & Training
Medical School
Graduated from Yale University School Of Medicine in 1993.
NPI Number
Dr. Grannum's NPI number is 1508897935.
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Frequently Asked Questions
- Where is Dr. Errol Grannum's office located?
- Dr. Errol Grannum's office is located at 1910 S 1st St, McAllen, TX, 78503.
- How can I make an appointment with Dr. Errol Grannum?
- You can find contact information for Dr. Errol Grannum here on Vitals.
- Which hospitals is Dr. Errol Grannum affiliated with?
- Dr. Errol Grannum is affiliated with Dhr Health Edinburg.
- Does Dr. Errol Grannum accept my insurance?
- You can see the insurance plans that Dr. Errol Grannum accepts on their Vitals profile.
- Does Dr. Errol Grannum accept virtual/telehealth appointments?
- Dr. Errol Grannum has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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