Thomas J. Definnis, D.M.D., P.C.
General Practice Dentistry · Wynnewood, PA
Thomas J. Definnis, D.M.D., P.C. is a general practice dentistry with a practice address in Wynnewood, Pennsylvania, and NPI 1770612624, issued on Mar 5, 2007. Check the license with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thomas J. Definnis
- Credential
- D.M.D., P.C.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- Practice location
- 300 E Lancaster Ave, Wynnewood, PA 19096
- Phone
- (610) 642-0139
- Enumerated
- Mar 5, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (610) 645-5612
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 4,612 in Pennsylvania → Look up another NPI →
Also registered at 300 E Lancaster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Breglia, PSYDClinical Psychologist1134455264
- Kamala CorbittSocial Worker1164965489
- Joseph De Leon, MDInternal Medicine Physician1821380551
- Sara Deichman, LCSWClinical Social Worker1770718199
- Ann Eichen, PH.D.Clinical Psychologist1104045558
- Tracey Ellenbogen, MSW,LCSWClinical Social Worker1134261357
Verify Thomas J. Definnis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average general practice dentistry in 2024
75 Medicare Part D claims for 38 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin26 claims
- Chlorhexidine Gluconate15 claims
- Sodium Fluoride12 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.
Thomas J. Definnis among 4,612 general practice dentistry records in Pennsylvania
Thomas J. Definnis, D.M.D., P.C. is one of 4,612 general practice dentistry records with a practice address in Pennsylvania. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 37% of them.
- NPI issued2007 · 37% of these records are older, 39% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 76% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Dentistry providers in Pennsylvania
There are 4,612 general practice dentistry records in Pennsylvania.
All 4,612 in Pennsylvania → Every provider in Wynnewood → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Domenic Baglivo, D.M.D.Wynnewood, PA 190961952413569
- Steven Danzig, D.D.S.Wynnewood, PA 190961487628319
- Nancy Dipietro, D.D.S.Wynnewood, PA 190961437123163
- William Snider, D.M.D.Wynnewood, PA 190961497917785
- Howard Weinstock, D.D.S.Wynnewood, PA 190961780655563
- Victoria Galenas, DMDWyncote, PA 190951538848189
- Rock Shadduck, DMDWyncote, PA 190951124642392
- Russell Young, D.D.S.Woodlyn, PA 190941003977331
Common questions
What is Thomas J. Definnis, D.M.D., P.C.'s NPI number?
Thomas J. Definnis, D.M.D., P.C.'s National Provider Identifier (NPI) is 1770612624, issued on Mar 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Thomas J. Definnis, D.M.D., P.C. located?
The NPPES record lists a practice address at 300 E Lancaster Ave, Wynnewood, PA, 19096. Phone: (610) 642-0139. Providers update this record themselves, so call before visiting.
How can I verify Thomas J. Definnis, D.M.D., P.C.'s license?
Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Thomas J. Definnis, D.M.D., P.C. prescribe under Medicare Part D?
In 2024, Thomas J. Definnis, D.M.D., P.C. had 75 Medicare Part D claims for 38 beneficiaries; the average among general practice dentistry prescribers was 83. 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.