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Dr. Todd D. Aaron, MD

Internal Medicine (Internal Medicine Physician)

  • Medicare participating

At a glance

Years since graduation
41
In the NPI registry since
2005
Medicare patients seen, 2024
487

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

  • 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Medicare’s Care Compare data doesn’t list this clinician’s medical school. 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
    PA license MD0410421

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

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
487
Services billed
4,661
Patients’ average age
79
Most frequent Medicare services, 2023
ServiceTimesPatients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes3,787383
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes651134
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes607150
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes495406
Hospital discharge day management, 30 minutes or less328257
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes286231
Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes20642
Established patient office or other outpatient visit, 40-54 minutes18979
Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes14447
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes11475

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 Philadelphia

Sources

NPI registry (CMS NPPES, November 2026; record last updated March 21, 2017), 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 1457350522. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.