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

Dr. William Wertheim, MD

Individual provider Internal Medicine Physician · NPI 1174548200

Dr. William Wertheim, MD practises Internal Medicine in East Setauket, New York. Graduated from New York University School of Medicine in 1989, 37 years ago. Practices with Stony Brook Internists University Faculty Practice Corporation, a 428-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
37
Trained at
New York University School of Medicine
Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

205 N Belle Mead Rd
East Setauket, NY 11733 Not confirmed with CMS for 19 years — call before visiting
Phone: (631) 444-4630
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 196934 (NY)

Record details

NPI number1174548200
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 12, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolNEW YORK UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Stony Brook Internists University Faculty Practice Corporation — 428 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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 patients110
Services billed 266 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Stony Brook Internists University Faculty Practice Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 428 clinicians in the practice; 12 are shown here.

Other providers in East Setauket