Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. John Koenig, MD

Individual provider Internal Medicine Physician · NPI 1245962620

Dr. John Koenig, MD is a Hospitalist in Boston, Massachusetts. Qualified in 2022, 4 years ago. Practices with Coastal Medical Associates, a 446-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
4
Licensed in
MA
In the registry since
2022
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

736 Cambridge St
Boston, MA 02135-2907
Phone: (617) 789-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 55 Fogg Rd, Weymouth, MA 02190-2432 — (781) 624-8000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 294432 (MA)

Record details

NPI number1245962620
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 25, 2022
Last updated in NPPESAugust 4, 2025
Certification dateAugust 4, 2025

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Coastal Medical Associates — 446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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.

Food and Beverage $37 1 payment · 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.

Colleagues at Coastal Medical Associates

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 446 clinicians in the practice; 12 are shown here.

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