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

Dr. Alison Theresa O'Brien, MD

Individual provider Family Medicine Physician · NPI 1427042571

Dr. Alison Theresa O'Brien, MD is registered under Family Practice in Delhi, New York. Graduated from Perelman School of Med at the University of Pennsylvania in 2000, 26 years ago. Practices with Mary Imogene Bassett Hospital, a 779-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
26
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
NY
In the registry since
2005
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

460 Andes Rd
Delhi, NY 13753-7443
Phone: (607) 746-0550
Fax: (607) 746-0568
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 317 Climax St, Pittsburgh, PA 15210-1347 — (412) 431-3520

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 293347 (NY)

Record details

NPI number1427042571
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 6, 2005
Last updated in NPPESMay 22, 2020
Certification dateMay 22, 2020

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 2000 (26 years in practice)
Group practice Mary Imogene Bassett Hospital — 779 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients150
Services billed 552 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 Mary Imogene Bassett Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 779 clinicians in the practice; 12 are shown here.

Other providers in Delhi