Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Gregory L Ostrom, MD, PHD

Individual provider Internal Medicine Physician · NPI 1376782870

Dr. Gregory L Ostrom, MD, PHD is an Internal Medicine Physician in Elgin, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
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.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

370 Summit St Ste 5
Elgin, IL 60120-3843
Phone: (847) 741-0372
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036-054784 (IL)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 036-054784 (IL)
Aerospace Medicine Physician Taxonomy 2083A0100X · Licence 36-054784 (IL)

Record details

NPI number1376782870
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedFebruary 7, 2009
Last updated in NPPESFebruary 7, 2009
Mailing address370 Summit St, Suite 5, Elgin, IL 60120-3843

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