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Dr. Eileen P. Simak, D.O.

Geriatric Medicine (Geriatric Medicine (Internal Medicine) Physician)

  • Medicare participating

At a glance

Years since graduation
26
In the NPI registry since
2005
Medicare patients seen, 2024
426

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

  • 2000Medical school: Philadelphia College of Osteopathic 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

  • Geriatric Medicine (Internal Medicine) Physician primary
    PA license OS012101

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

Map: Geriatric 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
426
Services billed
922
Patients’ average age
81
Most frequent Medicare services, 2023
ServiceTimesPatients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes366114
Established patient office or other outpatient visit, 30-39 minutes204142
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes115114
New patient office or other outpatient visit, 45-59 minutes5858
Established patient office or other outpatient visit, 20-29 minutes4037
Established patient office or other outpatient visit, 40-54 minutes3532
Telephone medical discussion with physician, 11-20 minutes2724
New patient office or other outpatient visit, 60-74 minutes1616

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 Geriatric Medicine clinicians in Allentown

Sources

NPI registry (CMS NPPES, November 2026; record last updated February 15, 2019), 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 1073516670. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.