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Dr. Ivan D. Ongom, MD

Hospitalist (Hospitalist Physician)

  • Medicare participating

At a glance

Years since graduation
20
In the NPI registry since
2009
Medicare patients seen, 2024
424

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. What an NPI is

Education and training

  • 2009Registered with an NPI (national billing number; not a license date)

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

  • Hospitalist Physician primary
    OH license 35-098603
  • Internal Medicine Physician
    KY license 48246 · OH license 35-098603

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

Map: Hospitalist 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
424
Services billed
983
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes341171
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes287184
Hospital discharge day management, more than 30 minutes195193
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes104104

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 Hospitalist clinicians in Dayton

Sources

NPI registry (CMS NPPES, November 2026; record last updated April 26, 2018), 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 1659502433. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.