# Leonard M Klein

Source: https://ourhealthnetwork.com/doctor/leonard-klein-1255328878
NPI: 1255328878
Data source: CMS NPI Registry (DAC), refreshed monthly

## Quick facts

Leonard M Klein is a hematology/oncology based in Niles, IL practicing at Illinois Cancer Specialists with NPI 1255328878.

## Profile

- Primary specialty: Hematology/Oncology
- Secondary specialties: INTERNAL MEDICINE
- Gender: Male
- Medical school: STATE UNIVERSITY OF NEW YORK AT BUFFALO SCHOOL OF MEDICINE
- Graduation year: 1978
- NPI: 1255328878 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1255328878))

## Practice and contact

- Practice name: Illinois Cancer Specialists
- Address: 8915 W Golf Rd, Niles, IL, 607145905
- Phone: (847) 827-9060
- Group practice size: 31 members

## Insurance accepted (1 networks)

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

- [Medicare](https://ourhealthnetwork.com/insurance/medicare) — 1 plan

To verify a specific plan covers Leonard M Klein, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1255328878).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 1 disclosed payment from medical industry sources totaling approximately $25.

Largest disclosed payer: Eisai Inc. ($25 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 Hematology/Oncology doctors in NILES, IL](https://ourhealthnetwork.com/hematology-oncology/il/niles)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1255328878)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)