Paul Brian Dieffenbach, M.D.
Critical Care Medicine (Internal Medicine) Physician · Boston, MA
Paul Brian Dieffenbach, M.D. is a critical care medicine (internal medicine) physician with a practice address in Boston, Massachusetts, and NPI 1376717348, issued on Apr 21, 2008. Check the license (Massachusetts 250616, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Paul Brian Dieffenbach
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 250616 MA
Self-reported in NPPES; status is on the state search - Practice location
- 15 Francis St, Boston, MA 02115
- Phone
- (617) 732-6770
- Enumerated
- Apr 21, 2008
- Record last updated
- Apr 14, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (617) 582-6102
- Medicare enrollment
- Enrolled (PECOS I20150825004754); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2008
- Entity
- Type 1 · individual
Also registered at 15 Francis St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Camann, MDAnesthesiology Physician1902887979
- Lynda ChichesterPhysician Assistant1760134928
- Claire Cutting, MDPulmonary Disease Physician1114424785
- Dawn Demeo, MDPulmonary Disease Physician1346206588
- Gary Epler, MDPulmonary Disease Physician1184680308
- Kari Furtek, PHARM.D.Pharmacist1629110770
Verify Paul Brian Dieffenbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 250616Check 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
- Brigham And Womens Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Massachusetts
There are 157 critical care medicine (internal medicine) physician records in Massachusetts.
Other critical care medicine (internal medicine) physician records in Massachusetts
- Renu Agarwal, MD FCCPGreat Barrington, MA1639121593
- Padmastuti Akella, MDWorcester, MA1467988873
- Salvador Albanese, M.D.Woburn, MA1437130630
- Jamie Allen, D.O.North Andover, MA1194187435
- Joshua Allgaier, D.O.Springfield, MA1215390588
- Margaret Allison, MD,PHDBoston, MA1114447398
- Hafez Alsmaan, MDPittsfield, MA1780857912
- Ahmad Alwassia, MDNorth Dartmouth, MA1700149366
- Rupenkumar Amin, M.D.Concord, MA1568625820
- Elias Baedorf Kassis, M.D.Boston, MA1225358799
Common questions
What is Paul Brian Dieffenbach, M.D.'s NPI number?
Paul Brian Dieffenbach, M.D.'s National Provider Identifier (NPI) is 1376717348, issued on Apr 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Paul Brian Dieffenbach, M.D. located?
The NPPES record lists a practice address at 15 Francis St, Boston, MA, 02115. Phone: (617) 732-6770. Providers update this record themselves, so call before visiting.
How can I verify Paul Brian Dieffenbach, M.D.'s license?
NPPES lists Massachusetts license number 250616, 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.