William Warren Phillips, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Worcester, MA
William Warren Phillips, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Worcester, Massachusetts, and NPI 1609260793, issued on Mar 26, 2015. Check the license (Massachusetts 275008, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Warren Phillips
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- 275008 MA
Self-reported in NPPES; status is on the state search - Practice location
- 67 Belmont St, Worcester, MA 01605
- Phone
- (508) 334-8996
- Enumerated
- Mar 26, 2015
- Record last updated
- Jul 2, 2024
- Fax
- (508) 334-6296
- Medicare enrollment
- Enrolled (PECOS I20240712002936); accepts Medicare assignment
- Medical or professional school
- Rush Medical College Of Rush University, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 228 in Massachusetts → Look up another NPI →
Also registered at 67 Belmont St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mirret El-HagrassyNeurology Physician1144514688
- Carlos Fairen Oro, MDSurgery Physician1265041032
Verify William Warren Phillips in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 275008Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
11 Medicare Part D claims, against an average of 101 among the 2,587 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.
Bills Medicare through one group practice
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Warren Phillips among 228 thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts
William Warren Phillips, M.D. is one of 228 thoracic surgery (cardiothoracic vascular surgery) 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 2015, is newer than 84% of them.
- NPI issued2015 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2015 · median 1998 among the 131 with a school on file
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Massachusetts
There are 228 thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts.
All 228 in Massachusetts → Every provider in Worcester → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Geoffrey Graeber, M.D.Worcester, MA 016051154415875
- Feiran Lou, M.D.Worcester, MA 016051295997831
- Mark Maxfield, M.D.Worcester, MA 016051073757001
- Angelo Pezzella, M.D.Worcester, MA 016051215976303
- Karl Uy, M.D.Worcester, MA 016051548226723
- Robert Bojar, M.D.Worcester, MA 016081639111032
- James Fingleton, MDWorcester, MA 016081265438709
- Michael O'Shea, M.D.Worcester, MA 016081164481404
Common questions
What is William Warren Phillips, M.D.'s NPI number?
William Warren Phillips, M.D.'s National Provider Identifier (NPI) is 1609260793, issued on Mar 26, 2015. An NPI identifies a provider in billing; it is not a license.
Where is William Warren Phillips, M.D. located?
The NPPES record lists a practice address at 67 Belmont St, Worcester, MA, 01605. Phone: (508) 334-8996. Providers update this record themselves, so call before visiting.
How can I verify William Warren Phillips, M.D.'s license?
NPPES lists Massachusetts license number 275008, 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.
How much does William Warren Phillips, M.D. prescribe under Medicare Part D?
In 2024, William Warren Phillips, M.D. had 11 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.