William Ephraim Greenberg, M.D.
Psychiatry Physician · Boston, MA
William Ephraim Greenberg, M.D. is a psychiatry physician with a practice address in Boston, Massachusetts, and NPI 1265481527, issued on May 6, 2006. Check the license (Massachusetts 42635, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Ephraim Greenberg
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 42635 MA
Self-reported in NPPES; status is on the state search - Practice location
- 330 Brookline Ave, Boston, MA 02215
- Phone
- (617) 667-4766
- Enumerated
- May 6, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100614000038); accepts Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 1976
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 330 Brookline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amtul Aala, MDNephrology Physician1174946347
- Elijah AbassStudent in an Organized Health Care Education/Training Program1306784947
- Omar Abdel-Razek, MDInterventional Cardiology Physician1912780008
- Youssef Abdullah, MD, MBAStudent in an Organized Health Care Education/Training Program1346983442
- Najma Abdullahi, MD, MPHStudent in an Organized Health Care Education/Training Program1669213054
- Elisabeth AbelesStudent in an Organized Health Care Education/Training Program1528659760
Verify William Ephraim Greenberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 42635Check 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 one group practice
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Ephraim Greenberg among 2,736 psychiatry physician records in Massachusetts
William Ephraim Greenberg, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 51% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1976 · median 2005 among the 1,219 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
845 psychiatry physician records list a practice address in Boston
They are 845 of the 41,865 NPPES records with a practice address in Boston, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Boston → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Susan Carey, M.D.Boston, MA 022151477509669
- Chandlee Dickey, MDBoston, MA 022151235195488
- Elizabeth Dunn, M.D.Boston, MA 022151114974656
- Ramona Dvorak, M.D.Boston, MA 022151386635589
- Evgeniy Filin, M.D.Boston, MA 022151619935418
- Jonathan Florman, M.D.Boston, MA 022151568416592
- Michael Edward Hirsch, M.D.Boston, MA 022151366490518
- Sharon Jacobs, MDBoston, MA 022151487615951
Common questions
What is William Ephraim Greenberg, M.D.'s NPI number?
William Ephraim Greenberg, M.D.'s National Provider Identifier (NPI) is 1265481527, issued on May 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Ephraim Greenberg, M.D. located?
The NPPES record lists a practice address at 330 Brookline Ave, Boston, MA, 02215. Phone: (617) 667-4766. Providers update this record themselves, so call before visiting.
How can I verify William Ephraim Greenberg, M.D.'s license?
NPPES lists Massachusetts license number 42635, 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.