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Dr. Errol O. Grannum, MD


  • 1910 S 1st St Ste 400
    McAllen, TX 78503
  • 1 Location
  • (956) 687-3937

Dr. Grannum's Overview

Dr. Errol O. Grannum graduated from the Yale University School of Medicine in 1993. He works in McAllen, TX and specializes in Ophthalmology. Dr. Grannum is affiliated with Doctors Hospital At Renaissance. He speaks English and Spanish.

Gender: Male

Languages Spoken: English, Spanish

Dr. Grannum's Experience

Years in Practice: 22

Procedures Performed by Dr. Grannum

Dr. Grannum's Specialties


Dr. Grannum's Education & Training

Medical School: Yale University School of Medicine; Graduated 1993

Dr. Grannum's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • Ambetter Superior Health Plan
  • BCBS Blue Card PPO
  • BCBS TX Blue Advantage HMO HIX
  • BCBSTX BlueChoice
  • CIGNA Open Access
  • Great West PPO
  • View More

Dr. Grannum's Office Information & Appointments

Office Locations

Errol O Grannum MD

1910 S 1st St Ste 400
McAllen, TX 78503
(956) 687-3937


Office Hours and Information

Fax: (956) 687-3938

Practice Website: Not Available

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

Monday Closed
Tuesday 8:00 AM - 5:00 PM
Wednesday Closed
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed
Sunday Closed

Other Physicians in Dr. Grannum's Practice

  • Not Available

Dr. Grannum's Hospital Affiliations

Office Locations