James Ostrenga, M.D.
NPI 1801983648 · Cardiovascular Disease Physician · Naperville, IL
James Ostrenga, M.D. is a Cardiovascular Disease Physician provider in Naperville, IL (NPI 1801983648).
Provider details
- NPI number
- 1801983648
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-057460 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-05
- Last updated
- 2014-03-21
Frequently asked questions
- What is James Ostrenga's NPI number?
- James Ostrenga's National Provider Identifier (NPI) is 1801983648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Ostrenga's specialty?
- James Ostrenga is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is James Ostrenga located?
- James Ostrenga's practice location on file with NPPES is 100 Spalding Drive, Naperville, IL 60540.
- What is James Ostrenga's phone number?
- The practice phone number listed in the NPPES registry for James Ostrenga is (630) 357-4111.
- Is James Ostrenga's NPI active?
- Yes — James Ostrenga's NPI (1801983648) is active in the NPPES registry as of the last update on 2014-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.