Robert S. Janett, MD
Internal Medicine Physician · Cambridge, MA
Robert S. Janett, MD is an internal medicine physician with a practice address in Cambridge, Massachusetts, and NPI 1992870497, issued on Nov 21, 2006. Check the license (Massachusetts 50902, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Robert S. Janett
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 50902 MA
Self-reported in NPPES; status is on the state search - Practice location
- 237 Hampshire St, Cambridge, MA 02139
- Phone
- (617) 575-5570
- Enumerated
- Nov 21, 2006
- Record last updated
- Feb 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid IDs
- 3019055 MA
1211978 MA - Medicare enrollment
- Enrolled (PECOS I20050323000317); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 237 Hampshire St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elvira Aronzon, PA-CPhysician Assistant1851358279
- Henrietta BarnesInternal Medicine Physician1245393701
- Becky Bjorkman, R.N.Registered Nurse1841797487
- Laura Delaney, R.N.Registered Nurse1679910947
- Yelizaveta DimantClinical Social Worker1568832749
- David Elvin, M.D.Internal Medicine Physician1245250661
Verify Robert S. Janett in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 50902Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average internal medicine physician in 2024
4,167 Medicare Part D claims for 380 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 93 claims were for opioids.
Most prescribed
- Atorvastatin Calcium311 claims
- Lisinopril198 claims
- Omeprazole177 claims
- Trulicity151 claims
- Metoprolol Succinate147 claims
- Amlodipine Besylate137 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
- Cambridge Public Health CommissionEverett, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert S. Janett among 6,825 internal medicine physician records in Massachusetts
Robert S. Janett, MD 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
- Graduated1980 · median 2004 among the 4,103 with a school on file
- Record last updated2012 · 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).
300 internal medicine physician records list a practice address in Cambridge
They are 300 of the 5,145 NPPES records with a practice address in Cambridge, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Cambridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Baron, MDCambridge, MA 021391376503318
- John Brusch, MDCambridge, MA 021391639138449
- David Diamond, MDCambridge, MA 021391265411664
- Leigh Firn, MDCambridge, MA 021391194706507
- Agnes Graves, M.D.Cambridge, MA 021391932160934
- Howard Heller, MDCambridge, MA 021391508856287
- Michael Kane, MDCambridge, MA 021391376524769
- William Kettyle, MDCambridge, MA 021391306823414
Common questions
What is Robert S. Janett, MD's NPI number?
Robert S. Janett, MD's National Provider Identifier (NPI) is 1992870497, issued on Nov 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert S. Janett, MD located?
The NPPES record lists a practice address at 237 Hampshire St, Cambridge, MA, 02139. Phone: (617) 575-5570. Providers update this record themselves, so call before visiting.
How can I verify Robert S. Janett, MD's license?
NPPES lists Massachusetts license number 50902, 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 Robert S. Janett, MD prescribe under Medicare Part D?
In 2024, Robert S. Janett, MD had 4,167 Medicare Part D claims for 380 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.