Eileen Merkle Stewart, M.D.
Pediatric Cardiology Physician · Austin, TX
Eileen Merkle Stewart, M.D. is a pediatric cardiology physician with a practice address in Austin, Texas, and NPI 1245403146, issued on Apr 11, 2008. Check the license (Texas Q3444, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Eileen Merkle Stewart
- Credential
- M.D.
- Primary taxonomy
- Pediatric Cardiology Physician 2080P0202X
- License number
- Q3444 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4314 Medical Parkway, Austin, TX 78756
- Phone
- (512) 454-1110
- Enumerated
- Apr 11, 2008
- Record last updated
- Oct 3, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatric cardiology physician records → All 325 in Texas → Look up another NPI →
Verify Eileen Merkle Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license Q3444Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $6,908.00
2 payments; by number, the most common kind was consulting fee; the largest payer was Sonio. The 1,156 providers of this specialty with any payment received $2,864.57 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Eileen Merkle Stewart among 325 pediatric cardiology physician records in Texas
Eileen Merkle Stewart, M.D. is one of 325 pediatric cardiology physician records with a practice address in Texas. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 46% of them.
- NPI issued2008 · 46% of these records are older, 44% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2016 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Cardiology Physician providers in Texas
There are 325 pediatric cardiology physician records in Texas.
All 325 in Texas → Every provider in Austin → Pediatric Cardiology Physician nationwide →
The 8 pediatric cardiology physician records with the nearest ZIP codes
- Arnold Fenrich, MDAustin, TX 787561790736494
- James Finnigan, M.D.Austin, TX 787561154386753
- Gregory Johnson, M.D.Austin, TX 787561437107331
- Hanoch Patt, M.D.Austin, TX 787561730113754
- Stuart Rowe, M.D.Austin, TX 787561811954787
- Kenneth Shaffer, M.D.Austin, TX 787561922062652
- Daniel Shmorhun, M.D.Austin, TX 787561841251246
- Karen Wright, M.D.Austin, TX 787561356396444
Common questions
What is Eileen Merkle Stewart, M.D.'s NPI number?
Eileen Merkle Stewart, M.D.'s National Provider Identifier (NPI) is 1245403146, issued on Apr 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Eileen Merkle Stewart, M.D. located?
The NPPES record lists a practice address at 4314 Medical Parkway, Austin, TX, 78756. Phone: (512) 454-1110. Providers update this record themselves, so call before visiting.
How can I verify Eileen Merkle Stewart, M.D.'s license?
NPPES lists Texas license number Q3444, 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.
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.