Physician Profile
Margaret A. Greven, M.D.
Unclaimed ProfileAbout Dr. Greven
Margaret A. Greven, M.D. practices ophthalmology in Winston Salem, NC. According to Medicare claims data, Margaret cared for 1,123 Medicare patients across 5,694 services. The services billed most often include injection, faricimab-svoa, 0.1 mg, imaging of retina, and injection of drug into eye.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (336) 716-4091
- Email not available
Practice Locations
MEDICAL CENTER BLVD DEPT OF OPHTHALMOLOGY
Winston Salem, NC 27157
Conditions Commonly Evaluated or Treated
Within Ophthalmology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Cataracts
- Diabetic retinopathy
- Dry eye
- Glaucoma
- Macular degeneration
Cornea and external eye
- Blepharitis
- Corneal abrasion
- Corneal ulcer
- Keratoconus
- Pink eye
- Pterygium
Eyelid and tear drainage
- Blocked tear duct
- Chalazion
- Drooping eyelid
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
Eye injuries
- Foreign Object in Eye
Inflammation, neurologic, and orbit
Retina & vitreous
- Eye Floaters and Flashes
Procedures & services
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Examination and imaging
- Corneal topography
- Fluorescein angiography
Cataract and lens
Corneal procedures
Eye diagnostics
- Optical Coherence Tomography Scan
Eye injuries
Eyelid surgery
- Stye Removal
Eyelid, tear duct, and muscle
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
Procedures Most Often Billed to Medicare
5,694 services · 1,123 patients · 11 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of drug into eye | Procedure | 67028 |
573 | More often than most peers in Ophthalmology |
| Injection of drug into eye | Procedure | 67028 |
158 | More often than most peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
941 | More often than most peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
214 | More often than most peers in Ophthalmology |
| Injection, faricimab-svoa, 0.1 mg | Drug given | J2777 |
3,000 | Less often than most peers in Ophthalmology |
| Injection, aflibercept, 1 mg | Drug given | J0178 |
166 | Less often than most peers in Ophthalmology |
| Injection, bevacizumab, 10 mg | Drug given | J9035 |
50 | Less often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
415 | More often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
81 | More often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
71 | Less often than most peers in Ophthalmology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other eye doctors in Winston Salem 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 2011 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of drug into eye 7
Providers in NC who bill this service to Medicare most often.
Common questions
What is Margaret A. Greven's specialty?
Margaret A. Greven is an eye doctor in Winston Salem, NC. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
Where can I find Margaret A. Greven?
Margaret A. Greven is listed at Medical Center Blvd Dept of Ophthalmology, Winston Salem, NC 27157. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Margaret A. Greven?
The number on file is (336) 716-4091. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Margaret A. Greven's NPI number?
Margaret A. Greven's National Provider Identifier is 1821380874. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Margaret A. Greven's education?
Margaret A. Greven attended Other, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How long has Margaret A. Greven been practicing?
Margaret A. Greven has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What is Margaret A. Greven known for?
According to Medicare billing data, Margaret A. Greven performs procedures including injection of drug into eye; provides treatments such as imaging of retina, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Margaret A. Greven confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Margaret A. Greven. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.