Mack D. Stewart, MD
Emergency Medicine Physician · Tyler, TX
Mack D. Stewart, MD is an emergency medicine physician with a practice address in Tyler, Texas, and NPI 1902849417, issued on Jun 13, 2006. Check the license (Texas G8441, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mack D. Stewart
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G8441 TX
Self-reported in NPPES; status is on the state search - Practice location
- 107 Robert E Lee Dr, Tyler, TX 75703
- Phone
- (903) 561-0300
- Enumerated
- Jun 13, 2006
- Record last updated
- Mar 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid IDs
- 137131212 TX
137131207 TX
137131211 TX - Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 107 Robert E Lee Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Megan Augustus, NP-CFamily Nurse Practitioner1649735960
Verify Mack D. Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G8441Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average emergency medicine physician in 2024
41 Medicare Part D claims for 18 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Progesterone12 claims
- Spironolactone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $225.30
15 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
Mack D. Stewart among 4,885 emergency medicine physician records in Texas
Mack D. Stewart, MD is one of 4,885 emergency medicine physician records with a practice address in Texas. 83% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 67% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2020 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
86 emergency medicine physician records list a practice address in Tyler
They are 86 of the 5,531 NPPES records with a practice address in Tyler, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Tyler → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Henry Burns, DOTyler, TX 757031467482778
- Steven Cooley, M.D.Tyler, TX 757031073757407
- Charles Isbell, M.D.Tyler, TX 757031497700785
- Trung Nguyen, DOTyler, TX 757031144266883
- Kurt Nielsen, MDTyler, TX 757031235275314
- Michelle Parker, MDTyler, TX 757031093153645
- Kyle Webster, MDTyler, TX 757031528683554
- Yousef Abdel-Raziq, MDTyler, TX 757011215432695
Common questions
What is Mack D. Stewart, MD's NPI number?
Mack D. Stewart, MD's National Provider Identifier (NPI) is 1902849417, issued on Jun 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mack D. Stewart, MD located?
The NPPES record lists a practice address at 107 Robert E Lee Dr, Tyler, TX, 75703. Phone: (903) 561-0300. Providers update this record themselves, so call before visiting.
How can I verify Mack D. Stewart, MD's license?
NPPES lists Texas license number G8441, 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.
How much does Mack D. Stewart, MD prescribe under Medicare Part D?
In 2024, Mack D. Stewart, MD had 41 Medicare Part D claims for 18 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.