Joseph Baker, MD, MPH
Family Medicine Physician · Boston, MA
Joseph Baker, MD, MPH is a family medicine physician with a practice address in Boston, Massachusetts, and NPI 1144338138, issued on Aug 29, 2006. Check the license (Massachusetts 245637, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joseph Baker
- Credential
- MD, MPH
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 245637 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1340 Boylston St, Boston, MA 02215
- Phone
- (617) 267-0900
- Enumerated
- Aug 29, 2006
- Entity
- Type 1 · individual
Also registered at 1340 Boylston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Adelstein, MDFamily Medicine Physician1306822416
- Emily Aduba, FNP-BCFamily Nurse Practitioner1831617315
- Adam Albano, M.D.Internal Medicine Physician1558689828
- Christopher Alonzo, M.D., MPHInternal Medicine Physician1265812226
- Isabella Anderson, MSWSocial Worker1528701315
- Sophia AxtmanFamily Nurse Practitioner1902452022
Verify Joseph Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 245637Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
76% more Medicare Part D claims than the average family medicine physician in 2024
6,255 Medicare Part D claims for 284 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 501 claims were for opioids.
Most prescribed
- Oxycodone Hcl256 claims
- Atorvastatin Calcium237 claims
- Gabapentin222 claims
- Biktarvy192 claims
- Omeprazole146 claims
- Fluticasone Propionate137 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.
Bills Medicare through one group practice
- Fenway Community Health Center, IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Family Medicine Physician providers in Massachusetts
There are 2,265 family medicine physician records in Massachusetts.
Other family medicine physician records in Massachusetts
- Salah Abass, M.D.Methuen, MA1417959776
- Majed Abbas, MDLowell, MA1346827870
- Sheila Abdallah, MDWorcester, MA1821356312
- Omar Abduljabar, M.D.Springfield, MA1770978843
- Jonathan Abel, DOSpringfield, MA1700897196
- Mohamed Abib, MDSturbridge, MA1639281090
- Kevin Abraham, M.D.Worcester, MA1689037673
- Janet Abrahamian, M.D.West Boylston, MA1932156627
- John Abramson, M.D.Ipswich, MA1275613903
- John Paul Abroguena, MDPlainville, MA1235361080
Common questions
What is Joseph Baker, MD, MPH's NPI number?
Joseph Baker, MD, MPH's National Provider Identifier (NPI) is 1144338138, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Baker, MD, MPH located?
The NPPES record lists a practice address at 1340 Boylston St, Boston, MA, 02215. Phone: (617) 267-0900. Providers update this record themselves, so call before visiting.
How can I verify Joseph Baker, MD, MPH's license?
NPPES lists Massachusetts license number 245637, 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 Joseph Baker, MD, MPH prescribe under Medicare Part D?
In 2024, Joseph Baker, MD, MPH had 6,255 Medicare Part D claims for 284 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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 27, 2026.