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

Dr. Brendan M. O'Brien, MD

Individual provider Otolaryngology Physician · NPI 1225270978

Dr. Brendan M. O'Brien, MD is an Otolaryngology in Medford, New Jersey. Graduated from State University of New York at Stony Brook, School of Medicine in 2009, 17 years ago. Practices with ENT and Allergy Associates LLP, a 432-clinician group and accepts Medicare assignment. Licensed in New Jersey, New York and Pennsylvania.

Years since qualifying
17
Trained at
State University of New York at Stony Brook, School of Medicine
Licensed in
NJ, NY, PA
In the registry since
2009
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

103 Old Marlton Pike Ste 225
Medford, NJ 08055-8772
Phone: (856) 576-5742
Fax: (856) 519-5457
Show map & directions

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

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 25MA10227600 (NJ)
Otolaryngology Physician Taxonomy 207Y00000X · Licence MD461499 (PA)
Otolaryngology Physician Taxonomy 207Y00000X · Licence 273735 (NY)

Record details

NPI number1225270978
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 26, 2009
Last updated in NPPESFebruary 20, 2025
Certification dateFebruary 20, 2025

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolSTATE UNIVERSITY OF NEW YORK AT STONY BROOK, SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Ent And Allergy Associates Llp — 432 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount