Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Ivan David Ongom, MD

Individual provider Internal Medicine Physician · NPI 1659502433

Ivan David Ongom, MD practises Internal Medicine in Dayton, Ohio. Qualified in 2006, 20 years ago. Practices with Hisey Physician Services, LLC, a 57-clinician group and accepts Medicare assignment. Licensed in Kentucky and Ohio.

Years since qualifying
20
Licensed in
KY, OH
In the registry since
2009
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

30 E Apple St Ste 3300
Dayton, OH 45409-2939
Phone: (937) 208-8394
Fax: (937) 208-8388
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 35-098603 (OH)
Internal Medicine Physician Taxonomy 207R00000X · Licence 35-098603 (OH)
Internal Medicine Physician Taxonomy 207R00000X · Licence 48246 (KY)

Record details

NPI number1659502433
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2009
Last updated in NPPESApril 26, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice Hisey Physician Services, Llc — 57 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients424
Services billed 983 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Hisey Physician Services, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 57 clinicians in the practice; 12 are shown here.

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