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

Nathan O'Brien, MD

Individual provider Emergency Medicine Physician · NPI 1407438450

Nathan O'Brien, MD practises Emergency Medicine in Buffalo, New York. Graduated from Drexel University College of Medicine in 2021, 5 years ago. Practices with University Emergency Medical Services Inc, a 91-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
5
Trained at
Drexel University College of Medicine
Licensed in
NY
In the registry since
2021
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

77 Goodell St Ste 340
Buffalo, NY 14203-1243
Phone: (716) 645-9707
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 329153 (NY)

Record details

NPI number1407438450
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 28, 2021
Last updated in NPPESApril 19, 2024
Certification dateApril 19, 2024

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolDREXEL UNIVERSITY COLLEGE OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice University Emergency Medical Services Inc. — 91 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients63
Services billed 79 a service is one billed item, such as a visit, a test or a procedure
Average patient age63

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. Those with a page here are linked.

Colleagues at University Emergency Medical Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 91 clinicians in the practice; 12 are shown here.

Other providers in Buffalo