Stewart Schaefer, M.D.
Internal Medicine Physician · Austin, TX
Stewart Schaefer, M.D. is an internal medicine physician with a practice address in Austin, Texas, and NPI 1669867834, issued on Apr 3, 2015. Check the license (Texas R6475, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Stewart Schaefer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R6475 TX
Self-reported in NPPES; status is on the state search - Practice location
- 601 E 15TH St, Austin, TX 78701
- Phone
- (206) 324-7000
- Enumerated
- Apr 3, 2015
- Record last updated
- Aug 12, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180911000511); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2015
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 601 E 15TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stewart Schaefer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R6475Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
24 Medicare Part D claims for 15 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 72.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Seton Family OF DoctorsAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stewart Schaefer among 9,175 internal medicine physician records in Texas
Stewart Schaefer, M.D. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 71% of them.
- NPI issued2015 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2015 · median 2004 among the 6,088 with a school on file
- Record last updated2020 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
606 internal medicine physician records list a practice address in Austin
They are 606 of the 26,585 NPPES records with a practice address in Austin, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Austin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Swati Avashia, M.D.Austin, TX 787011740291319
- Teresa Coats, M.D.Austin, TX 787011992889844
- Jadranko Corak, M.D.Austin, TX 787011801960364
- Arshad Ghauri, M.D.Austin, TX 787011699849125
- Mark Hernandez, M.D.Austin, TX 787011093783490
- Celina Mankey, MDAustin, TX 787011427048149
- Tahir Mian, M.D.Austin, TX 787011679517015
- Lysbeth Miller, M.D.Austin, TX 787011285708305
Common questions
What is Stewart Schaefer, M.D.'s NPI number?
Stewart Schaefer, M.D.'s National Provider Identifier (NPI) is 1669867834, issued on Apr 3, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Stewart Schaefer, M.D. located?
The NPPES record lists a practice address at 601 E 15TH St, Austin, TX, 78701. Phone: (206) 324-7000. Providers update this record themselves, so call before visiting.
How can I verify Stewart Schaefer, M.D.'s license?
NPPES lists Texas license number R6475, 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 Stewart Schaefer, M.D. prescribe under Medicare Part D?
In 2024, Stewart Schaefer, M.D. had 24 Medicare Part D claims for 15 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Stewart Schaefer, M.D.'s MIPS final score?
The 2023 MIPS final score is 72.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.