NPPES file of Aug 9, 2026

Mark Stewart, M.D.

Vascular Surgery Physician · Austin, TX

Mark Stewart, M.D. is a vascular surgery physician with a practice address in Austin, Texas, and NPI 1336163633, issued on Jul 27, 2006. Check the license (Texas E8939, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1336163633
Name
Mark Stewart
Credential
M.D.
Primary taxonomy
Vascular Surgery Physician 2086S0129X
License number
E8939 TX
Self-reported in NPPES; status is on the state search
Practice location
1010 W 40TH St, Austin, TX 78756
Phone
(512) 459-8753
Enumerated
Jul 27, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(512) 483-6828
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest vascular surgery physician records → All 368 in Texas → Look up another NPI →

Also registered at 1010 W 40TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jeffrey Apple, M.D.Surgery Physician1750354924
  2. Robert Bridges, M.D.Vascular Surgery Physician1174536817
  3. Phillip Church, M.D.Vascular Surgery Physician1386651206
  4. Jennifer Clarner, P.A.Surgical Physician Assistant1548277833
  5. William Conner, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1801887864
  6. Brendan Dewan, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1134445539

Verify Mark Stewart in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license E8939    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

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Industry payments in 2024: $616.77

2 payments; by number, the most common kind was travel and lodging; the largest payer was Medtronic, Inc. The 4,059 providers of this specialty with any payment received $6,178.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mark Stewart$616.77
  2. Specialty average$6,178.00

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Mark Stewart among 368 vascular surgery physician records in Texas

Mark Stewart, M.D. is one of 368 vascular surgery physician records with a practice address in Texas. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.

  • NPI issued2006 · 13% of these records are older, 59% newer
  • In a Medicare fileYes · 91% of these records are
  • In the CMS Doctors and Clinicians fileNo · 79% of these records are
  • Record last updated2007 · 39% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086S0129X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Vascular Surgery Physician providers in Texas

There are 368 vascular surgery physician records in Texas.

All 368 in Texas → Every provider in Austin → Vascular Surgery Physician nationwide →

The 8 vascular surgery physician records with the nearest ZIP codes

  1. Robert Bridges, M.D.Austin, TX 787561174536817
  2. Phillip Church, M.D.Austin, TX 787561386651206
  3. Mazin Foteh, MDAustin, TX 787561811191794
  4. Jeffrey Jobe, M.D.Austin, TX 787561124042411
  5. David Nation, MDAustin, TX 787561518126234
  6. John Politz, M.D.Austin, TX 787561780608935
  7. Scott Seidel, M.D.Austin, TX 787561497721005
  8. Stephen Settle, M.D.Austin, TX 787561982628137

Common questions

What is Mark Stewart, M.D.'s NPI number?

Mark Stewart, M.D.'s National Provider Identifier (NPI) is 1336163633, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Stewart, M.D. located?

The NPPES record lists a practice address at 1010 W 40TH St, Austin, TX, 78756. Phone: (512) 459-8753. Providers update this record themselves, so call before visiting.

How can I verify Mark Stewart, M.D.'s license?

NPPES lists Texas license number E8939, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.