Dr. Matthew J. Sideman, MD
Vascular Surgery (Vascular Surgery Physician)
- Medicare participating
At a glance
- Medical school
- University of Texas Medical School at San Antonio (1996)
- Years since graduation
- 30
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 339
Licensed in Texas since 2009, according to the Texas Medical Board. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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
- 1996Medical school: University of Texas Medical School at San Antonio
- 2006Registered 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
-
Vascular Surgery Physician primary
TX license N4100 (first issued 2009; active) -
Surgery Physician
TX license N4100 (first issued 2009; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- University Health System San Antonio, TX
- Baptist Medical Center San Antonio, TX
- Ut Health San Antonio Multispecialty & Research Ho San Antonio, TX
- Christus Santa Rosa Medical Center San Antonio, TX
Medical groups
- University of Texas Health Science Center at San Antonio (1,297 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
- 339
- Services billed
- 832
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Ultrasound study of arm and leg arteries | 154 | 142 |
| Ultrasound of both sides of head and neck blood flow | 147 | 140 |
| Ultrasound study of arm or leg veins with compression and maneuvers | 117 | 113 |
| Established patient office or other outpatient visit, 30-39 minutes | 79 | 63 |
| Ultrasound of one leg arteries or artery grafts | 70 | 42 |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 50 | 37 |
| Ultrasound of hemodialysis access | 48 | 37 |
| New patient office or other outpatient visit, 45-59 minutes | 35 | 35 |
| Established patient office or other outpatient visit, 20-29 minutes | 33 | 28 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 33 | 31 |
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 |
|---|---|
| Clopidogrel (clopidogrel bisulfate) Other prescribers in San Antonio, TX | 67 |
| Cilostazol Other prescribers in San Antonio, TX | 19 |
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, 13 companies reported 36 payments worth $2,772 in total to this clinician.
| Reflow Medical Inc | $1,523 |
|---|---|
| Cook Medical LLC | $413 |
| Abbott Laboratories | $171 |
| W. L. Gore & Associates, Inc. | $164 |
| Boston Scientific Corporation | $138 |
| Shape Memory Medical Inc. | $107 |
| Veryan Medical Incorporated | $72.35 |
| Lemaitre Vascular, Inc. | $41.14 |
| Food and Beverage | $1,711 |
|---|---|
| Travel and Lodging | $1,061 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Reflow Medical Inc May 16, 2025 | Travel and Lodging travel to San Clemente, CA | $384 |
| Reflow Medical Inc Apr 21, 2025 | Travel and Lodging travel to San Clemente, CA | $358 |
| Reflow Medical Inc Apr 21, 2025 | Travel and Lodging travel to San Clemente, CA | $283 |
| Reflow Medical Inc Apr 21, 2025 | Travel and Lodging travel to San Clemente, CA | $35.00 |
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 $26,906 in research payments for these studies, mostly to the institutions running them.
- AAA-SHAPE Pivotal Trial: Abdominal Aortic Aneurysm Sac Healing and Prevention of Expansion
Shape Memory Medical Inc. · NCT06029667
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.