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Dr. Glenn Allison, M.D.

Internal Medicine (Internal Medicine Physician)

60 Hospital Rd
Leominster, MA 01453

Who else practices at this address →

Worcester County includes primary care (3% of residents) and mental health (11% of residents) shortage areas. About shortage areas

Call (978) 466-4169

  • Medicare participating

At a glance

Years since graduation
33
In the NPI registry since
2005
Medicare patients seen, 2024
338

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 1993Medical school: Boston University School of Medicine
  • 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Internal Medicine Physician primary
    MA license 81460

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Internal Medicine per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
338
Services billed
2,097
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Insertion of needle into vein for collection of blood sample567321
Established patient office or other outpatient visit, 20-29 minutes289281
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit251251
Established patient office or other outpatient visit, 30-39 minutes230174
Established patient office or other outpatient visit, 40-54 minutes175143
Administration of influenza virus vaccine108105
Influenza vaccine split virus, preservative free9292
Telephone medical discussion with physician, 21-30 minutes8966
Administration of pneumococcal vaccine4646
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use4545

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Internal Medicine clinicians in Leominster

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 8, 2007), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1497745848. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.