Gregory L. Ostrom, M.D., PH.D.
Internal Medicine Physician · Elgin, IL
Gregory L. Ostrom, M.D., PH.D. is an internal medicine physician with a practice address in Elgin, Illinois, and NPI 1376782870, issued on Feb 7, 2009. Check the license (Illinois 036-054784, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory L. Ostrom
- Credential
- M.D., PH.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 036-054784 IL
36-054784 IL
Self-reported in NPPES; status is on the state search - Practice location
- 370 Summit St, Elgin, IL 60120
- Phone
- (847) 741-0372
- Enumerated
- Feb 7, 2009
- Record last updated
- Feb 7, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 370 Summit St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Tracy Denne, PAPhysician Assistant1780889006
- Oletha Johnson, NPNurse Practitioner1770788234
- Michelle Krause, APN, FNP-CFamily Nurse Practitioner1376890889
Verify Gregory L. Ostrom in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-054784Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory L. Ostrom among 7,238 internal medicine physician records in Illinois
Gregory L. Ostrom, M.D., PH.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2009, is newer than 49% of them.
- NPI issued2009 · 49% of these records are older, 49% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2009 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
62 internal medicine physician records list a practice address in Elgin
They are 62 of the 2,268 NPPES records with a practice address in Elgin, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,238 in Illinois → Every provider in Elgin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jaskirat Bhatia, MDElgin, IL 601201003496597
- Rosalina Guerrero-Guzman, MDElgin, IL 601201013010628
- Anh Si Le, DOElgin, IL 601201295361152
- Fausto Lora-Mir, M.D.Elgin, IL 601201104875434
- Neelam Patel, PA-CElgin, IL 601201194314880
- Devendra Shah, M.DElgin, IL 601201700952140
- Heena Shyamani, M.D.Elgin, IL 601201629145727
- Viswanatham Susarla, M.D.Elgin, IL 601201922014315
Common questions
What is Gregory L. Ostrom, M.D., PH.D.'s NPI number?
Gregory L. Ostrom, M.D., PH.D.'s National Provider Identifier (NPI) is 1376782870, issued on Feb 7, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Gregory L. Ostrom, M.D., PH.D. located?
The NPPES record lists a practice address at 370 Summit St, Elgin, IL, 60120. Phone: (847) 741-0372. Providers update this record themselves, so call before visiting.
How can I verify Gregory L. Ostrom, M.D., PH.D.'s license?
NPPES lists Illinois license number 036-054784, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.