Thomas Ptak, MD PHD
Diagnostic Radiology Physician · Worcester, MA
Thomas Ptak, MD PHD is a diagnostic radiology physician with a practice address in Worcester, Massachusetts, and NPI 1467436394, issued on Dec 5, 2005. Check the license (Massachusetts 74590, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Thomas Ptak
- Credential
- MD PHD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- 74590 MA
MD487489 PA
D0083946 MD
Self-reported in NPPES; status is on the state search - Practice location
- 55 Lake Ave N, Worcester, MA 01655
- Phone
- (508) 334-3850
- Enumerated
- Dec 5, 2005
- Record last updated
- May 21, 2026
- Medicaid IDs
- 889007200 MD
091658433 DC - Medicare enrollment
- Enrolled (PECOS I20171116001033); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,658 in Massachusetts → Look up another NPI →
Also registered at 55 Lake Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paula Abate, NPNurse Practitioner1336265909
- Aly AbayazeedDiagnostic Radiology Physician1821221946
- Zainab AbbasDermatology Physician1609028000
- Mary-Alice Abbott, MDClinical Genetics (M.D.) Physician1982799417
Verify Thomas Ptak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 74590Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 3 group practices
- Medical Imaging OF Lehigh Valley PCSevern, MD
- Umass Memorial Medical Group IncSevern, MD
- Wellspan Medical GroupEphrata, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Ptak among 1,658 diagnostic radiology physician records in Massachusetts
Thomas Ptak, MD PHD is one of 1,658 diagnostic radiology physician records with a practice address in Massachusetts. 68% 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, 87% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1990 · median 2006 among the 1,125 with a school on file
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
159 diagnostic radiology physician records list a practice address in Worcester
They are 159 of the 13,166 NPPES records with a practice address in Worcester, and 1,658 diagnostic radiology physician records in Massachusetts.
All 1,658 in Massachusetts → Every provider in Worcester → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Steven Birnbaum, MDWorcester, MA 016551831177310
- Joseph Ferrucci, M.D.Worcester, MA 016551629045703
- Jeffrey Greenberg, MDWorcester, MA 016551588642193
- Young Kim, M.D.Worcester, MA 016551245295518
- Tasneem Lalani, MDWorcester, MA 016551417910811
- Jorge Medina, M.D.Worcester, MA 016551477520930
- Michael Morrow, D.O.Worcester, MA 016551598745721
- Christine Petersen, MDWorcester, MA 016551578554044
Common questions
What is Thomas Ptak, MD PHD's NPI number?
Thomas Ptak, MD PHD's National Provider Identifier (NPI) is 1467436394, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Ptak, MD PHD located?
The NPPES record lists a practice address at 55 Lake Ave N, Worcester, MA, 01655. Phone: (508) 334-3850. Providers update this record themselves, so call before visiting.
How can I verify Thomas Ptak, MD PHD's license?
NPPES lists Massachusetts license number 74590, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.