Nathan O'Brien, MD
Emergency Medicine Physician · Buffalo, NY
Nathan O'Brien, MD is an emergency medicine physician with a practice address in Buffalo, New York, and NPI 1407438450, issued on Apr 28, 2021. Check the license (New York 329153, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Nathan O'Brien
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 329153 NY
Self-reported in NPPES; status is on the state search - Practice location
- 77 Goodell St Ste 340, Buffalo, NY 14203
- Phone
- (716) 645-9707
- Enumerated
- Apr 28, 2021
- Record last updated
- Apr 19, 2024
- Medicare enrollment
- Enrolled (PECOS I20240607002744); accepts Medicare assignment
- Medical or professional school
- Drexel University College Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 5,025 in New York → Look up another NPI →
Also registered at 77 Goodell St Ste 340
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cristine Adams, MDEmergency Medicine Physician1134161193
- Samuel Ali, PAMedical Physician Assistant1700269487
- Elroy AnStudent in an Organized Health Care Education/Training Program1073454070
- Caston Banham, DOStudent in an Organized Health Care Education/Training Program1750132411
- Rachel Bellis, MDStudent in an Organized Health Care Education/Training Program1619737541
- Andrew Bode, DOStudent in an Organized Health Care Education/Training Program1447190343
Verify Nathan O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 329153Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average emergency medicine physician in 2024
37 Medicare Part D claims for 29 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- University Emergency Medical Services Inc.Buffalo, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan O'Brien among 5,025 emergency medicine physician records in New York
Nathan O'Brien, MD is one of 5,025 emergency medicine physician records with a practice address in New York. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 7% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2021 · median 2013 among the 3,232 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
156 emergency medicine physician records list a practice address in Buffalo
They are 156 of the 13,287 NPPES records with a practice address in Buffalo, and 5,025 emergency medicine physician records in New York.
All 5,025 in New York → Every provider in Buffalo → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Cristine Adams, MDBuffalo, NY 142031134161193
- Jeanne Basior, MDBuffalo, NY 142031982610994
- Mary Bennett, MDBuffalo, NY 142031457368094
- Dawn Bingeman, MDBuffalo, NY 142031144237785
- Jason Borton, MDBuffalo, NY 142031932137429
- Andrew Covey, MDBuffalo, NY 142031235169871
- Christian Defazio, MDBuffalo, NY 142031689627465
- Michael Klein, DOBuffalo, NY 142031912940446
Common questions
What is Nathan O'Brien, MD's NPI number?
Nathan O'Brien, MD's National Provider Identifier (NPI) is 1407438450, issued on Apr 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Nathan O'Brien, MD located?
The NPPES record lists a practice address at 77 Goodell St Ste 340, Buffalo, NY, 14203. Phone: (716) 645-9707. Providers update this record themselves, so call before visiting.
How can I verify Nathan O'Brien, MD's license?
NPPES lists New York license number 329153, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathan O'Brien, MD prescribe under Medicare Part D?
In 2024, Nathan O'Brien, MD had 37 Medicare Part D claims for 29 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.