Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John W. Winkelman, PHD/MD

Individual provider Sleep Medicine (Internal Medicine) Physician · NPI 1619950045

John W. Winkelman, PHD/MD practises Psychiatry in Boston, Massachusetts. Graduated from Harvard Medical School in 1987, 39 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
39
Trained at
Harvard Medical School
Licensed in
MA
In the registry since
2005
Specialties on file
3
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Practice location Address checks out

55 Fruit St
Boston, MA 02114-2621
Phone: (617) 724-7426
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Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12 Field Rd, Lexington, MA 02421-8015 — (781) 929-3454

Specialties & licences

Sleep Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084S0012X · Licence 73677 (MA)
Sleep Medicine (Internal Medicine) Physician Taxonomy 207RS0012X · Licence 73677 (MA)
Psychiatry Physician Taxonomy 2084P0800X · Licence 73677 (MA)

Record details

NPI number1619950045
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD/MD
Sole proprietorNo
NPI enumeratedNovember 21, 2005
Last updated in NPPESJune 11, 2024
Certification dateJune 11, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1987 (39 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients341
Services billed 577 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Consulting Fee $2,688 4 payments
Food and Beverage $263 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Massachusetts General Physicians Organization Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3484 clinicians in the practice; 12 are shown here.

Other providers in Boston