Quick answers
- Which hospitals does Daniel J. Oleary work at?
- Medicare's official clinician data lists Daniel J. Oleary at 5 hospitals: Emerson Hospital -, Heywood Hospital -, Marlborough Hospital, UMass Memorial Healthalliance Hospitals and UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Daniel J. Oleary see patients?
- Medicare's clinician data lists 1 practice location in Leominster, MA. Call before your visit to confirm the address.
- What is Daniel J. Oleary's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Daniel J. Oleary accept Medicare assignment?
- Yes. Medicare's clinician data says Daniel J. Oleary accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Daniel J. Oleary offer telehealth?
- Medicare's clinician data says Daniel J. Oleary offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Daniel J. Oleary?
- (978) 534-4241, as listed in official Medicare / NPI Registry data.
- What is Daniel J. Oleary's NPI number?
- 1447346531. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Daniel J. Oleary works
Medicare's Facility Affiliation Data lists Daniel J. Oleary at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · CCN 220084
- Heywood Hospital -Gardner, MA · Acute Care Hospital · CCN 220095
- Marlborough HospitalMarlborough, MA · Acute Care Hospital · CCN 220049
- UMass Memorial Healthalliance HospitalsLeominster, MA · Acute Care Hospital · CCN 220001
- UMass Memorial Medical Center/University CampusWorcester, MA · Acute Care Hospital · CCN 220163
Practice locations
Addresses where Daniel J. Oleary is enrolled with Medicare (CMS data updated 2026-10-02).
- 50 Memorial Dr, Suite 205Leominster, MA 01453 (978) 534‑4241
Group practices
Medicare enrollment lists Daniel J. Oleary as a member of this group (CMS data updated 2026-10-02).
- Leominster Medical Associates2 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Leominster
Clinicians with the same Medicare primary specialty in Leominster, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1447346531 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians