NPPES file of Aug 9, 2026

George L. King, M.D.

Endocrinology, Diabetes & Metabolism Physician · Boston, MA

George L. King, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Boston, Massachusetts, and NPI 1669458816, issued on Dec 20, 2005. Check the license (Massachusetts 47728, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1669458816
Name
George L. King
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
47728 MA
Self-reported in NPPES; status is on the state search
Practice location
1 Joslin PL, Boston, MA 02215
Phone
(617) 732-2622
Enumerated
Dec 20, 2005
Record last updated
Jul 13, 2026
Fax
(617) 732-2637
Medicare enrollment
Enrolled (PECOS I20050728000385); accepts Medicare assignment
Medical or professional school
Duke University School Of Medicine, 1975
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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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.

  1. Adham Abdel Mottalib, MDEndocrinology, Diabetes & Metabolism Physician1740774892
  2. Omar Abdelal, MDRetina Specialist (Ophthalmology) Physician1497241962
  3. Motasem Al-Latayfeh, M.D.Ophthalmology Physician1184855710
  4. Louise Ambler Osborn, CPNPPediatric Nurse Practitioner1013389386
  5. Sue-Ellen Anderson-Haynes, MS, RDN, LDNRegistered Dietitian1326329590
  6. Gillian Arathuzik, RD, LDN, CDEMetabolic Nutrition Registered Dietitian1922023217

Verify George L. King in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 47728    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

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67% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

872 Medicare Part D claims for 67 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.

  1. George King872
  2. Specialty average2,630

Most prescribed

  1. Jardiance134 claims
  2. Metformin Hcl107 claims
  3. Januvia64 claims
  4. Acarbose54 claims
  5. Nano 2nd Gen Pen Needle34 claims
  6. Lantus Solostar32 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

  1. Joslin Clinic IncBoston, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

George L. King among 522 endocrinology, diabetes & metabolism physician records in Massachusetts

George L. King, M.D. 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 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 86% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated1975 · median 2002 among the 378 with a school on file
  • Record last updated2026 · 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

  1. Richard Beaser, MDBoston, MA 022151447204540
  2. Ramachandiran Cooppan, M.D.Boston, MA 022151366499097
  3. Aaron Cypess, M.D., PH.D.Boston, MA 022151598730749
  4. Rachael Fawcett, M.D.Boston, MA 022151801879945
  5. Robert Gabbay, M.D.Boston, MA 022151720036627
  6. Jason Gaglia, M.D.Boston, MA 022151023098605
  7. Mark Herman, M.D.Boston, MA 022151043261795
  8. Christos Mantzoros, MDBoston, MA 022151275512808

Common questions

What is George L. King, M.D.'s NPI number?

George L. King, M.D.'s National Provider Identifier (NPI) is 1669458816, issued on Dec 20, 2005. An NPI identifies a provider in billing; it is not a license.

Where is George L. King, M.D. located?

The NPPES record lists a practice address at 1 Joslin PL, Boston, MA, 02215. Phone: (617) 732-2622. Providers update this record themselves, so call before visiting.

How can I verify George L. King, M.D.'s license?

NPPES lists Massachusetts license number 47728, 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 George L. King, M.D. prescribe under Medicare Part D?

In 2024, George L. King, M.D. had 872 Medicare Part D claims for 67 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.