Richard Seth Beaser, MD
Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Richard Seth Beaser, MD is an endocrinology, diabetes & metabolism physician with a practice address in Boston, Massachusetts, and NPI 1447204540, issued on May 22, 2006. Check the license (Massachusetts 45152, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Richard Seth Beaser
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 45152 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Joslin PL, Boston, MA 02215
- Phone
- (617) 732-2675
- Enumerated
- May 22, 2006
- Record last updated
- Apr 25, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (617) 732-2452
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 1 Joslin PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Omar Abdelal, MDRetina Specialist (Ophthalmology) Physician1497241962
- Motasem Al-Latayfeh, M.D.Ophthalmology Physician1184855710
- Louise Ambler Osborn, CPNPPediatric Nurse Practitioner1013389386
- Sue-Ellen Anderson-Haynes, MS, RDN, LDNRegistered Dietitian1326329590
- Gillian Arathuzik, RD, LDN, CDEMetabolic Nutrition Registered Dietitian1922023217
Verify Richard Seth Beaser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 45152Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
133 Medicare Part D claims for 51 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Metformin Hcl Er15 claims
- Atorvastatin Calcium14 claims
- Nano 2nd Gen Pen Needle14 claims
- Novolog Flexpen14 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.
Richard Seth Beaser among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Richard Seth Beaser, MD is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 52% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2011 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Boston → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Ramachandiran Cooppan, M.D.Boston, MA 022151366499097
- Aaron Cypess, M.D., PH.D.Boston, MA 022151598730749
- Rachael Fawcett, M.D.Boston, MA 022151801879945
- Robert Gabbay, M.D.Boston, MA 022151720036627
- Jason Gaglia, M.D.Boston, MA 022151023098605
- Mark Herman, M.D.Boston, MA 022151043261795
- George King, M.D.Boston, MA 022151669458816
- Christos Mantzoros, MDBoston, MA 022151275512808
Common questions
What is Richard Seth Beaser, MD's NPI number?
Richard Seth Beaser, MD's National Provider Identifier (NPI) is 1447204540, issued on May 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Seth Beaser, MD located?
The NPPES record lists a practice address at 1 Joslin PL, Boston, MA, 02215. Phone: (617) 732-2675. Providers update this record themselves, so call before visiting.
How can I verify Richard Seth Beaser, MD's license?
NPPES lists Massachusetts license number 45152, 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 Richard Seth Beaser, MD prescribe under Medicare Part D?
In 2024, Richard Seth Beaser, MD had 133 Medicare Part D claims for 51 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.