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

Dr. John J Brennan, MD

Individual provider Sports Medicine (Orthopaedic Surgery) Physician · NPI 1154353977

Dr. John J Brennan, MD is an Orthopedic Surgery in East Setauket, New York. Graduated from State University of New York Downstate Medical Center in 1993, 33 years ago. Practices with Orthopedic Assoc of Long Island Physicians and Medical Group PLLC, a 31-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
33
Trained at
State University of New York Downstate Medical Center
Licensed in
NY
In the registry since
2006
Specialties on file
2
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

6 Technology Dr Ste 100
East Setauket, NY 11733-4079
Phone: (631) 689-6698
Fax: (631) 751-5548
Show map & directions

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

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 211330 (NY)
Sports Medicine (Orthopaedic Surgery) Physician Taxonomy 207XX0005X · Licence 211330 (NY)

Record details

NPI number1154353977
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 6, 2006
Last updated in NPPESMay 24, 2019

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Also practisesSPORTS MEDICINE
Medical schoolSTATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER
Graduated 1993 (33 years in practice)
Group practice Orthopedic Assoc Of Long Island Physicians And Medical Group Pllc — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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