Eric J. Thierman, MD
Internal Medicine Physician · Williamsville, NY
Eric J. Thierman, MD is an internal medicine physician with a practice address in Williamsville, New York, and NPI 1235101908, issued on Feb 6, 2006. Check the license (New York 219381, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Eric J. Thierman
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 219381 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1835 Maple RD, Williamsville, NY 14221
- Phone
- (716) 634-5410
- Enumerated
- Feb 6, 2006
- Record last updated
- Jul 21, 2022
- Medicaid ID
- 04231010 NY
- Medicare enrollment
- Enrolled (PECOS I20040427001059); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 1835 Maple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Erk, DOObstetrics & Gynecology Physician1477520203
- William Hartrich, M.D.Internal Medicine Physician1629026703
- Timothy Heyden, M.D.Internal Medicine Physician1427012467
- Dawn Hrab, M.D.Pediatrics Physician1003870056
- Nicole Riedy, D.O.Internal Medicine Physician1730410762
- Mariana Rizzo, CNPObstetrics & Gynecology Nurse Practitioner1003883851
Verify Eric J. Thierman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 219381Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
7,992 Medicare Part D claims for 706 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 230 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium494 claims
- Atorvastatin Calcium440 claims
- Levothyroxine Sodium310 claims
- Prednisone295 claims
- Pantoprazole Sodium253 claims
- Amlodipine Besylate249 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: $986.70
63 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through 2 group practices
- Internal Med ID Associates, LLCGetzville, NY
- Maple Internal Medicine And Pediatrics PLLCWilliamsville, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eric J. Thierman among 12,067 internal medicine physician records in New York
Eric J. Thierman, MD is one of 12,067 internal medicine physician records with a practice address in New York. 79% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2002 among the 7,221 with a school on file
- Record last updated2022 · 61% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
64 internal medicine physician records list a practice address in Williamsville
They are 64 of the 3,530 NPPES records with a practice address in Williamsville, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Williamsville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Burnett, MDWilliamsville, NY 142211679559934
- Jeffrey Burnett, DOWilliamsville, NY 142211346226271
- Lynn Cieslak, M.D.Williamsville, NY 142211518951011
- Peter Elkin, M.D.Williamsville, NY 142211568432656
- Shuman Hua, M.D.Williamsville, NY 142211245219229
- Bonnie McMichael, M.D.Williamsville, NY 142211881692267
- Larisa Meras, M.D.Buffalo, NY 142211962474262
- Margaret Mitchell, M.D.Williamsville, NY 142211477551331
Common questions
What is Eric J. Thierman, MD's NPI number?
Eric J. Thierman, MD's National Provider Identifier (NPI) is 1235101908, issued on Feb 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Eric J. Thierman, MD located?
The NPPES record lists a practice address at 1835 Maple RD, Williamsville, NY, 14221. Phone: (716) 634-5410. Providers update this record themselves, so call before visiting.
How can I verify Eric J. Thierman, MD's license?
NPPES lists New York license number 219381, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Eric J. Thierman, MD prescribe under Medicare Part D?
In 2024, Eric J. Thierman, MD had 7,992 Medicare Part D claims for 706 beneficiaries; 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.