Dr. David Reese O'Brien Jr., MD

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

• North Carolina Baptist Hospital Hospital · Winston-Salem, NC

Colleagues at Wake Forest University Health Sciences

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2621 clinicians in the practice; 12 are shown here.

• Dr. Saskia Anzola, MD Anesthesiology Physician · Winston Salem, NC
• Meredith Renae Clark, APNP Nurse Practitioner · Winston Salem, NC
• Charlotte Amanda Cullipher, AGNP-C Nurse Practitioner · Winston Salem, NC
• Mrs. Sarah Deen Registered Dietitian · Augusta, GA
• Dr. Mohammad Kazem Fallahzadeh Abarghouei, MD Nephrology Physician · Winston Salem, NC
• Mr. Michael Keith Farris, MD Radiation Oncology Physician · Statesville, NC
• Adrian Walter Laxton, MD Neurological Surgery Physician · Winston Salem, NC
• Nicole Michelle Millard, PA-C Physician Assistant · Mount Airy, NC
• Dr. Shannon Nicole Mumma, MD Emergency Medicine Physician · Winston Salem, NC
• Nicole Jean Prendergast Emergency Medicine Physician · Winston Salem, NC
• John G Spangler, MD Family Medicine Physician · Winston Salem, NC
• Dr. Matthew Olen Thompson, MD Student in an Organized Health Care Education/Training Program · Winston Salem, NC

Other providers in Winston Salem

• Enrique Galang, MD

  Individual Pain Medicine (Physical Medicine & Rehabilitation) Physician · NPI 1518287291

  One Medical Center Blvd, Winston Salem, NC 27157-0001 · (336) 716-7246

• James Hua Lau, MD

  Individual Pain Medicine (Physical Medicine & Rehabilitation) Physician · NPI 1730824368

  One Medical Center Blvd, Winston Salem, NC 27157-3465 · (336) 716-7246

• Novant Health Medical Group, LLC

  Organization Pain Medicine (Physical Medicine & Rehabilitation) Physician · NPI 1568808855

  190 Kimel Park Dr Ste 140, Winston Salem, NC 27103-6946 · (336) 277-2225

• Matthew Gary Sharp, DO

  Individual Pain Medicine (Physical Medicine & Rehabilitation) Physician · NPI 1548824394

  131 Miller St, Winston Salem, NC 27103-2508 · (336) 716-8200