Allen Sonstein, MD
Internal Medicine Physician · Austin, TX
Allen Sonstein, MD is an internal medicine physician with a practice address in Austin, Texas, and NPI 1831194489, issued on Jun 19, 2005. Check the license (Texas E3462, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Allen Sonstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- E3462 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7201 Manchaca RD, Austin, TX 78745
- Phone
- (512) 443-3577
- Enumerated
- Jun 19, 2005
- Record last updated
- Jan 20, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (512) 445-6027
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 7201 Manchaca RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Linda Hargrove, RN C-FNPFamily Nurse Practitioner1578569919
- Debra McDowell, PT MSHPPhysical Therapist1063629640
- Michael Petersen, PA-CPhysician Assistant1972746931
- John Pratt, LCSWClinical Social Worker1356382915
Verify Allen Sonstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license E3462Check 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
27 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Allen Sonstein among 9,175 internal medicine physician records in Texas
Allen Sonstein, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2014 · 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
- James Boysen, M.D.Austin, TX 787451699779330
- Isaac Chitrit, MDSunset Valley, TX 787451144200403
- Steven Dobberfuhl, MDAustin, TX 787451932105400
- Alejandra Garza, M.D.Sunset Valley, TX 787451538503172
- Diana Horton, MDAustin, TX 787451467432880
- Shahab Hyder, MDSunset Valley, TX 787451033355987
- Linda Isaacs, M.D.Austin, TX 787451629079439
- Robert Stroud, MDAustin, TX 787451851407043
Common questions
What is Allen Sonstein, MD's NPI number?
Allen Sonstein, MD's National Provider Identifier (NPI) is 1831194489, issued on Jun 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Allen Sonstein, MD located?
The NPPES record lists a practice address at 7201 Manchaca RD, Austin, TX, 78745. Phone: (512) 443-3577. Providers update this record themselves, so call before visiting.
How can I verify Allen Sonstein, MD's license?
NPPES lists Texas license number E3462, 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 Allen Sonstein, MD prescribe under Medicare Part D?
In 2024, Allen Sonstein, MD had 27 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.