Dr. Margaret A. Greven
- Gender: Female
- Experience: 10 years
- Graduation year: 2011
- Sole propriator: No
- NPI: 1821380874
Dr. Margaret A. Greven M.D.
Ophthalmologist
She is located at Medical Center Boulevard Department Of Ophthalmology in Winston Salem, NC 27157. Can help patients with the following: Corneal Disease, Exotropia, Keratoconus, Macular Degeneration, Oculomotor Dysfunction, Retinal Detachment. Her National Provider Identifier (NPI) number is 1821380874. Appointment can be made via the phone number (336) 716-4091. She is affiliated with 2 hospitals.
Conditions treated
Dr. Margaret A. Greven, being an ophthalmologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Margaret A. Greven.
- Astigmatism
- Binocular Dysfunction (BVD)
- Blepharitis
- Blindness
- Cataracts
- Chalazion
- Color Blindness
- Corneal Disease
- Corneal Ulcer
- Crossed Eyes
- Diabetic Retinopathy
- Double Vision
- Dry Eyes
- Esotropia
- Exotropia
- Eye Floaters
- Eye Strain
- Farsightedness
- Glaucoma
- Herpes of the Eye
- Hypertropia
- Keratitis
- Keratoconus
- LASIK
- Lazy Eye
- Macular Degeneration
- Nearsightedness
- Oculomotor Dysfunction
- Optic Neuritis
- Pink Eye
- Presbyopia
- Retinal Detachment
- Retinitis Pigmentosa (RP)
- Scleritis
- Sty
- Subconjunctival Hemorrhage
- Tunnel Vision
- Usher Syndrome
- Uveitis
Procedures Performed by Dr. Margaret A. Greven
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Margaret A. Greven as in-network for the following 2026 plans.
Health plans
Ambetter of North Carolina
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 29 plans from Ambetter of North Carolina
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Clear Silver with $0 Insulin Options | HMO · Silver | Preferred | Accepting new patients |
| Complete Gold | HMO · Gold | Preferred | Accepting new patients |
| Complete Gold + Vision + Adult Dental | HMO · Gold | Preferred | Accepting new patients |
| Complete Gold with Atrium Health | HMO · Gold | Preferred | Accepting new patients |
| Complete Gold with Atrium Health + Vision + Adult Dental | HMO · Gold | Preferred | Accepting new patients |
| Elite Bronze | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Elite Bronze with Atrium Health + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Enhanced Asthma/COPD Care Silver with $0 Drug Options | HMO · Silver | Preferred | Accepting new patients |
| Enhanced Asthma/COPD Care Silver with $0 Drug Options + Vision + Adult Dental | HMO · Silver | Preferred | Accepting new patients |
| Everyday Bronze | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Everyday Bronze with Atrium Health + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Focused Silver with Atrium Health | HMO · Silver | Preferred | Accepting new patients |
| Focused Silver with Atrium Health + Vision + Adult Dental | HMO · Silver | Preferred | Accepting new patients |
| Standard Expanded Bronze | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Expanded Bronze with Atrium Health + Vision + Adult Dental | HMO · Expanded Bronze | Preferred | Accepting new patients |
| Standard Gold | HMO · Gold | Preferred | Accepting new patients |
| Standard Gold + Vision + Adult Dental | HMO · Gold | Preferred | Accepting new patients |
| Standard Gold with Atrium Health | HMO · Gold | Preferred | Accepting new patients |
| Standard Gold with Atrium Health + Vision + Adult Dental | HMO · Gold | Preferred | Accepting new patients |
| Standard Silver | HMO · Silver | Preferred | Accepting new patients |
| Standard Silver + Vision + Adult Dental | HMO · Silver | Preferred | Accepting new patients |
| Standard Silver with Atrium Health | HMO · Silver | Preferred | Accepting new patients |
| Standard Silver with Atrium Health + Vision + Adult Dental | HMO · Silver | Preferred | Accepting new patients |
AmeriHealth Caritas Next
Network data as of Sep 11, 2026, as reported by the insurer.
Show all 8 plans from AmeriHealth Caritas Next
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| AmeriHealth Caritas Next Bronze Essential + No Referrals | HMO · Bronze | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Bronze Premier + No Referrals | HMO · Expanded Bronze | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Bronze Signature + No Referrals | HMO · Expanded Bronze | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Gold Premier + No Referrals | HMO · Gold | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Gold Signature + No Referrals | HMO · Gold | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Silver Essential + No Referrals | HMO · Silver | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Silver Premier + No Referrals | HMO · Silver | Preferred | Accepting new patients |
| AmeriHealth Caritas Next Silver Signature + No Referrals | HMO · Silver | Preferred | Accepting new patients |
Oscar Health Plan of North Carolina, Inc
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 22 plans from Oscar Health Plan of North Carolina, Inc
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Bronze Classic 4700 | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Classic 4700 | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Classic Standard | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Classic Standard | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Elite + PCP Saver Plus | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Elite + PCP Saver Plus | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Breathe Easy with Enhanced COPD Benefits | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Chronic Care CKM | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Bronze Simple Diabetes | with Atrium Health | HMO · Expanded Bronze | Preferred | Accepting new patients at some locations |
| Gold Classic Standard | HMO · Gold | Preferred | Accepting new patients at some locations |
| Gold Classic Standard | with Atrium Health | HMO · Gold | Preferred | Accepting new patients at some locations |
| Silver Classic | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Classic Standard | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Classic Standard | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Classic | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple Breathe Easy with Enhanced COPD Benefits | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple Chronic Care CKM | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple Diabetes | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple Diabetes | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple PCP Saver | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple PCP Saver | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
| Silver Simple Women's Health with Menopause Benefits | with Atrium Health | HMO · Silver | Preferred | Accepting new patients at some locations |
UnitedHealthcare
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Essential ($0 Virtual Urgent Care, No Referrals | HMO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ Dental + Vision (No Referrals) | HMO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, $1 Tier 2 Rx, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage + ($0 Virtual Urgent Care, $1 Tier 2 Rx, Dental + Vision, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Standard (No Referrals) | HMO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, $3 Tier 2 Rx, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage + ($0 Virtual Urgent Care, $3 Tier 2 Rx, Dental + Vision, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Value ($0 Virtual Urgent Care, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Value + ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | HMO · Silver | Non Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Margaret A. Greven is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Margaret A. Greven is enrolled to bill Medicare as a Practitioner - Ophthalmology .
Bills through: Wake Forest University Health Sciences
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Studies
Graduated in 2011
Questions & Answers
What conditions does Dr. Margaret A. Greven treat?
Dr. Margaret A. Greven provides treatment for Corneal Disease, Exotropia, Keratoconus, Macular Degeneration, Oculomotor Dysfunction, Retinal Detachment. For the full list see this list.
Has Dr. Margaret A. Greven affiliation with hospitals?
Dr. Margaret A. Greven is affiliated with NORTH CAROLINA BAPTIST HOSPITAL. For the full list of hospitals see this list.
Does Dr. Margaret A. Greven accept patients with AmeriHealth Caritas Next?
Yes, Dr. Margaret A. Greven is listed in-network for AmeriHealth Caritas Next through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Where can you meet with Dr. Margaret A. Greven?
Dr. Margaret A. Greven's office is located at Medical Center Boulevard Department Of Ophthalmology in Winston Salem, NC 27157.