John R. Lamb, M.D.
Internal Medicine Physician · Oak Bluffs, MA
John R. Lamb, M.D. is an internal medicine physician with a practice address in Oak Bluffs, Massachusetts, and NPI 1679552467, issued on Jan 11, 2006. Check the license (Massachusetts 226239, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John R. Lamb
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 226239 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Hospital RD, Oak Bluffs, MA 02557
- Phone
- (508) 684-4500
- Enumerated
- Jan 11, 2006
- Record last updated
- May 10, 2022
- Fax
- (508) 684-4502
- Medicare enrollment
- Enrolled (PECOS I20060317000360); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 1979
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 1 Hospital RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- David Araujo, LMHCMental Health Counselor1134429533
- Ruth Barron, MDPsychiatry Physician1649340712
- Anne-Marie Bell, FNP-CFamily Nurse Practitioner1508249848
- Linsay BumilaNurse Practitioner1659906444
- Paula Caron, RPHPharmacist1407688328
Verify John R. Lamb in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 226239Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average internal medicine physician in 2024
5,488 Medicare Part D claims for 425 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium454 claims
- Levothyroxine Sodium291 claims
- Losartan Potassium270 claims
- Amlodipine Besylate208 claims
- Metoprolol Succinate173 claims
- Omeprazole173 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.
One hospital affiliation
- Martha's Vineyard Hospital IncOak Bluffs, MA · Critical Access Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John R. Lamb among 6,825 internal medicine physician records in Massachusetts
John R. Lamb, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1979 · median 2004 among the 4,103 with a school on file
- Record last updated2022 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 internal medicine physician records list a practice address in Oak Bluffs
They are 11 of the 143 NPPES records with a practice address in Oak Bluffs, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Oak Bluffs → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Merriebeth Dodge, DOOak Bluffs, MA 025571801857933
- Aletheia Donahue, M.D.Oak Bluffs, MA 025571548559396
- Beth Donnelly, MDOak Bluffs, MA 025571235195207
- Zachary Gitlin, MDOak Bluffs, MA 025571003203753
- Yosef Glassman, M.D.Oak Bluffs, MA 025571265417778
- Stuart Kendall, MDOak Bluffs, MA 025571467418426
- Michael Michotek, M.D.Oak Bluffs, MA 025571346445392
- Caleb Nannes, M.D.Oak Bluffs, MA 025571275832560
Common questions
What is John R. Lamb, M.D.'s NPI number?
John R. Lamb, M.D.'s National Provider Identifier (NPI) is 1679552467, issued on Jan 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John R. Lamb, M.D. located?
The NPPES record lists a practice address at 1 Hospital RD, Oak Bluffs, MA, 02557. Phone: (508) 684-4500. Providers update this record themselves, so call before visiting.
How can I verify John R. Lamb, M.D.'s license?
NPPES lists Massachusetts license number 226239, 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 John R. Lamb, M.D. prescribe under Medicare Part D?
In 2024, John R. Lamb, M.D. had 5,488 Medicare Part D claims for 425 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.