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

Daniel O'Leary, MD

Individual provider Internal Medicine Physician · NPI 1447346531

Daniel O'Leary, MD is an Internal Medicine in Leominster, Massachusetts. Graduated from University of Massachusetts Medical School in 1985, 41 years ago. Practices with Leominster Medical Associates, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
41
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2006
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

50 Memorial Dr Ste 205
Leominster, MA 01453
Phone: (978) 534-4241
Fax: (978) 534-3705
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 57335 (MA)

Record details

NPI number1447346531
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESFebruary 28, 2013
Mailing address50 Memorial Drive, Suite 205, Leominster, MA 01453

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1985 (41 years in practice)
Group practice Leominster Medical Associates — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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