# Jacek Zajac, MD

Source: https://ourhealthnetwork.com/doctor/jacek-zajac-md-1396817912
NPI: 1396817912
Data source: CMS NPI Registry (DAC), refreshed monthly

## Quick facts

Jacek Zajac, MD is a endocrinology based in Lombard, IL practicing at Endocrinology Associates Sc with NPI 1396817912.

## Profile

- Primary specialty: Endocrinology
- Credential: MD
- Gender: Male
- Graduation year: 1991
- NPI: 1396817912 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1396817912))

## Practice and contact

- Practice name: Endocrinology Associates Sc
- Address: 2500 S Highland Ave, Suite 104, Lombard, IL, 601485381
- Phone: (630) 629-3610
- Group practice size: 2 members

## Insurance accepted (7 networks)

This provider is in network with the following insurance carriers, based on federal Transparency in Coverage filings and FHIR provider directories:

- [HCSC: BCBS Illinois](https://ourhealthnetwork.com/insurance/hcsc-bcbs-illinois) — 109 plans
- [UnitedHealthcare](https://ourhealthnetwork.com/insurance/unitedhealthcare) — 12 plans
- [Cigna](https://ourhealthnetwork.com/insurance/cigna) — 10 plans
- [Aetna](https://ourhealthnetwork.com/insurance/aetna) — 7 plans
- [UMR](https://ourhealthnetwork.com/insurance/umr) — 3 plans
- [Oxford Health Plans (UHC)](https://ourhealthnetwork.com/insurance/oxford-health-plans-uhc) — 2 plans
- [Medicare](https://ourhealthnetwork.com/insurance/medicare) — 1 plan

To verify a specific plan covers Jacek Zajac, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1396817912).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 195 disclosed payments from medical industry sources totaling approximately $3,866.

Largest disclosed payer: Lilly USA, LLC ($708 cumulative).

Source: CMS Open Payments program (federal financial-transparency dataset). Industry payment disclosures do not imply any wrongdoing; many are legitimate consulting fees, research support, or speaker honoraria.

## Related on OurHealthNetwork

- [More Endocrinology doctors in LOMBARD, IL](https://ourhealthnetwork.com/endocrinology/il/lombard)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1396817912)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)