Dr. Athanasios Thomaides, M.D.
Internal Medicine (Internal Medicine Physician)
- Medicare participating
At a glance
- Medical school
- University of Texas Medical School at San Antonio (2006)
- Years since graduation
- 20
- In the NPI registry since
- 2008
- Medicare patients seen, 2024
- 805
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Medical school: University of Texas Medical School at San Antonio
- 2008Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Internal Medicine Physician primary
IN license 01065546A
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Medstar Washington Hospital Center Washington, DC
- Medstar Georgetown University Hospital Washington, DC
- Medstar Saint Mary's Hospital Leonardtown, MD
- Medstar Southern Maryland Hospital Center Clinton, MD
Medical groups
- Medstar Medical Group II LLC (3,767 clinicians)
- Medstar Heart Institute LLC (301 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 805
- Services billed
- 2,823
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 460 | 294 |
| Established patient office or other outpatient visit, 30-39 minutes | 318 | 221 |
| Established patient office or other outpatient visit, 40-54 minutes | 198 | 175 |
| Programming of dual lead pacemaker system | 136 | 98 |
| Evaluation of cardiac rhythm monitor system, remote up to 30 days | 133 | 46 |
| Interrogation device evaluation(s), (remote) up to 30 days; implantable cardiovascular physiologic monitor system, implantable loop recorder system, or subcutaneous cardiac rhythm monitor system, remote data acquisition(s), receipt of transmissions and tec | 131 | 45 |
| Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days | 110 | 85 |
| New patient office or other outpatient visit, 60-74 minutes | 88 | 88 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 85 | 83 |
| Insertion of pacemaker and upper and lower heart chamber electrode | 74 | 74 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Metoprolol Succinate Other prescribers in Greenwood, IN | 34 |
| Eliquis (apixaban) Other prescribers in Greenwood, IN | 33 |
| Xarelto (rivaroxaban) Other prescribers in Greenwood, IN | 20 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 20 companies reported 57 payments worth $7,999 in total to this clinician.
| Medtronic, Inc. | $3,831 |
|---|---|
| Medical Device Business Services, Inc. | $1,875 |
| Boston Scientific Corporation | $811 |
| Abbott Laboratories | $260 |
| Biosense Webster, Inc. | $227 |
| Kestra Medical Technology Services, Inc. | $172 |
| Atricure, Inc. | $145 |
| Amgen Inc. | $131 |
| Consulting Fee | $3,675 |
|---|---|
| Food and Beverage | $2,449 |
| Compensation for services other than consulting (speaking, faculty) | $1,875 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Medtronic, Inc. Mar 26, 2025 | Compensation for services other than consulting (speaking, faculty) | $1,875 |
| Medical Device Business Services, Inc. Jan 29, 2025 | Consulting Fee CARTO 3 · Cardiology | $1,875 |
| Medtronic, Inc. Oct 21, 2025 | Consulting Fee | $1,800 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $7,650 in research payments for these studies, mostly to the institutions running them.
- Investigator Sponsored Research: A 1827581.1
Medtronic, Inc.
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.