Physician
Margaret A Greven, M.D.
According to 2025 Medicare claims, Margaret Greven, M.D. (NPI: 1821380874) practices ophthalmology in the Winston-Salem, NC market, with the plurality of this provider's patient population coming from Forsyth, NC. This provider's primary affiliated billing organization is WAKE FOREST UNIVERSITY HEALTH SCIENCES (NPI: 1003803032; TIN: 223849199) and primary practice location at 27103-7110. Greven is affiliated with the Advocate Physician Partners Accountable Care, Inc. (ACO ID: A1033), participating under the MSSP model.
Greven's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 484 traditional Medicare patients, billed 5,836 HCPCS/CPT codes, and received $347,474 in Medicare payments. The top billing code was 67028 (Injection of drug into eye). Part D data shows 359 prescription claims across 143 beneficiaries totaling $38,021 in drug costs, led by Restasis (Cyclosporine). Open Payments data shows 3 records totaling $438. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.
Over the past 10 years, this provider's Medicare Part B carrier billing has risen steadily, from $6,426 to $347,474. Similarly, Part D prescription costs have risen steadily, from $21,833 to $38,021. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.