James P. Ostrenga, M.D.
Cardiovascular Disease Physician · Naperville, IL
James P. Ostrenga, M.D. is a cardiovascular disease physician with a practice address in Naperville, Illinois, and NPI 1801983648, issued on Oct 5, 2006. Check the license (Illinois 036-057460, 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
- James P. Ostrenga
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 036-057460 IL
Self-reported in NPPES; status is on the state search - Practice location
- 100 Spalding Drive, Naperville, IL 60540
- Phone
- (630) 357-4111
- Enumerated
- Oct 5, 2006
- Record last updated
- Mar 21, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (630) 357-4644
- Entity
- Type 1 · individual
Also registered at 100 Spalding Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Ottolin, M.D.Cardiovascular Disease Physician1265525729
Verify James P. Ostrenga 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 036-057460Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Cardiovascular Disease Physician providers in Illinois
There are 1,073 cardiovascular disease physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other cardiovascular disease physician records in Illinois
- Nicolaos Abariotis, MDChicago, IL1417996257
- Tahir Abbasi, M.D.Hazel Crest, IL1255495701
- Syed Abdul-Aziz, MDBelleville, IL1114906005
- Pierrot Abi Mansour, MDOak Lawn, IL1285627166
- Ashraf Abourahma, M.D.Oak Lawn, IL1972561975
- Bruce Abramowitz, M.D.,F.A.C.C.Oak Lawn, IL1013918473
- Joseph AdamsPark Ridge, IL1073179594
- Theodore Addai, M.D.Decatur, IL1912985185
- Karima AddetiaChicago, IL1740612993
- Keenan Adib, MDHinsdale, IL1790098804
Common questions
What is James P. Ostrenga, M.D.'s NPI number?
James P. Ostrenga, M.D.'s National Provider Identifier (NPI) is 1801983648, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James P. Ostrenga, M.D. located?
The NPPES record lists a practice address at 100 Spalding Drive, Naperville, IL, 60540. Phone: (630) 357-4111. Providers update this record themselves, so call before visiting.
How can I verify James P. Ostrenga, M.D.'s license?
NPPES lists Illinois license number 036-057460, 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.