EG
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Grannum, Ophthalmologist in McAllen, TX?
Dr. Errol Grannum, MD is an Ophthalmologist, who primarily practices in McAllen, TX with 2 additional practice locations. Dr. Grannum graduated from Yale University School of Medicine. Dr. Grannum is fluent in English and Spanish, and is currently seeing new patients. Dr. Grannum’s practice accepts Medicaid, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Grannum’s office at (956) 687-3937.
Where did Dr. Grannum go to medical school and complete their residency?
Medical School: Yale University School of Medicine
What languages does Dr. Grannum speak?
Dr. Grannum and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does an Ophthalmologist like Dr. Grannum typically treat?
As an Ophthalmologist, Dr. Grannum diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Grannum. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Primary Open-Angle Glaucoma
- Narrow Angle Glaucoma Risk
- Borderline Open-Angle Glaucoma
- Glaucoma
- Chronic Open-Angle Glaucoma
- Wide-Angle Glaucoma
- POAG
- Anatomical Narrow Angle
- Angle-Closure Glaucoma Risk
- Eye angle problem
- Early Open-Angle Glaucoma
- Open-angle glaucoma suspect
- Risk of Open-Angle Glaucoma
- High Eye Pressure
- Optic Nerve Damage
- Eye Pressure Disorder
- Chronic Simple Glaucoma
ICD-10 Codes:
- H401133: Primary open-angle glaucoma, bilateral, severe stage
- H40033: Anatomical narrow angle, bilateral
- H401113: Primary open-angle glaucoma, right eye, severe stage
- H40013: Open angle with borderline findings, low risk, bilateral
- H401131: Primary open-angle glaucoma, bilateral, mild stage
- H4089: Other specified glaucoma
- H401123: Primary open-angle glaucoma, left eye, severe stage
Also known as:
- Cataract
- Cloudy lens
- Lens clouding
- Eye cloudiness
ICD-10 Codes:
- H2513: Age-related nuclear cataract, bilateral
What procedures does an Ophthalmologist like Dr. Grannum typically perform?
As an Ophthalmologist, Dr. Grannum performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Grannum. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology here.
Also known as:
- Laser Eye Surgery for Glaucoma
- Laser Trabeculoplasty
- Laser Surgery for Secondary Cataract
- Iridotomy
- Iridectomy
- Laser Glaucoma Treatment
- Glaucoma laser surgery
- Laser eye treatment for glaucoma
- Trabeculoplasty
- YAG Laser Capsulotomy
- Posterior Capsulotomy
- Secondary Cataract Removal
- Laser Eye Surgery
CPT Codes:
- 66761: Iridotomy/iridectomy by laser surgery (eg, for glaucoma) (per session)
- 65855: Trabeculoplasty by laser surgery
- 66821: Discission of secondary membranous cataract (opacified posterior lens capsule and/or anterior hyaloid); laser surgery (eg, YAG laser) (1 or more stages)
Also known as:
- Eye Injection
- Intravitreal Injection
- Retinal Injection
- Macular Degeneration Injection
- Eye Medication Injection
CPT Codes:
- 67028: Intravitreal injection of a pharmacologic agent (separate procedure)
Also known as:
- Glaucoma Drainage Device Implant
- Aqueous Shunt Surgery
- Glaucoma Shunt with Graft
- Eye Pressure Shunt
CPT Codes:
- 66180: Aqueous shunt to extraocular equatorial plate reservoir, external approach; with graft
Also known as:
- Cataract Removal with Lens Implant
- Extracapsular cataract extraction
- Phacoemulsification
- IOL implantation
CPT Codes:
- 66984: Extracapsular cataract removal with insertion of intraocular lens prosthesis (1 stage procedure), manual or mechanical technique (eg, irrigation and aspiration or phacoemulsification); without endoscopic cyclophotocoagulation
Also known as:
- Laser Treatment for Retinopathy
- Photocoagulation for Retinopathy
- Diabetic Retinopathy Laser Treatment
- Retinal Laser Therapy
CPT Codes:
- 67228: Treatment of extensive or progressive retinopathy (eg, diabetic retinopathy), photocoagulation
Does Dr. Grannum accept my insurance?
Dr. Grannum accepts most major insurance plans. Important: Please call our office at (956) 687-3937 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Grannum accept in McAllen, TX?
Dr. Grannum in McAllen, TX accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Centene Corporation
Cigna Group
CVS Health (formerly Aetna)
Health Care Service Corporation
Humana
Medicare
Molina Healthcare
Other Health Care Provider
UnitedHealth Group
View All Insurances
Where is Dr. Grannum's office located?
What is Dr. Grannum's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Grannum's National Provider Identifier (NPI) number is 1508897935.
What common questions do patients ask about Dr. Grannum?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Grannum
What is Dr. Errol Grannum's specialty?
Dr. Grannum is a Ophthalmologist near McAllen, TX.
What does an Ophthalmologist do?
An ophthalmologist possesses the knowledge and professional skills required to deliver comprehensive eye and vision care. These medical doctors are trained to diagnose, monitor, and treat all ocular and visual disorders, whether through medical or surgical interventions. Their expertise encompasses a wide range of issues affecting the eye and its structures, including the eyelids, orbit, and visual pathways. Additionally, ophthalmologists prescribe vision services, such as glasses and contact lenses, to help patients achieve optimal visual health.
Is this Dr. Errol Grannum affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Grannum is affiliated with Rio Grande Regional Hospital, Dhr Health which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Ophthalmologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Ophthalmologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Errol Grannum accepting new patients in McAllen, TX?
Yes, Dr. Errol Grannum is accepting new patients at this time.
Does Dr. Errol Grannum offer online booking?
Please contact Dr. Grannum's office at (956) 687-3937 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Errol Grannum?
Please contact Dr. Grannum's office at (956) 687-3937 for information regarding telehealth appointment availability or for scheduling assistance.
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