Leonard M Klein, - Medicare Internal Medicine in Niles, IL

  1. Home
  2. Hematology & Oncology
  3. IL
  4. Niles
Leonard M Klein, is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in Niles, Illinois. His current practice location is 8915 W Golf Rd, Niles, Illinois. You can reach out to his office (for appointments etc.) via phone at (847) 827-9060.

Leonard M Klein is licensed to practice in Illinois (license number 036064246) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1255328878.

Contact Information

Leonard M Klein,
8915 W Golf Rd,
Niles, IL 60714-5905
(847) 827-9060
(847) 827-7196

Map and Direction




Physician's Profile

Full NameLeonard M Klein
GenderMale
SpecialityInternal Medicine - Hematology & Oncology
Location8915 W Golf Rd, Niles, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1255328878
  • Provider Enumeration Date: 09/29/2005
  • Last Update Date: 12/17/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 5991605164
  • Enrollment ID: I20091231000478

Medical Identifiers

Medical identifiers for Leonard M Klein such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1255328878NPI-NPPES
036064246MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology 036064246 (Illinois)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Leonard M Klein allows following entities to bill medicare on his behalf.
Entity NameIllinois Cancer Specialists
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1164483913
PECOS PAC ID: 5597665752
Enrollment ID: O20040113000165

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Leonard M Klein is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Leonard M Klein,
25070 Network Pl,
Chicago, IL 60673-1250

Ph: (847) 585-7000		Leonard M Klein,
8915 W Golf Rd,
Niles, IL 60714-5905

Ph: (847) 827-9060

Reviews and Comments


Internal Medicine Doctors in Niles, IL

Susan G Brown, MD
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: 8915 W Golf Rd, Niles, IL 60714
Phone: 847-827-9060    Fax: 847-827-7196
Kirill Zhadovich, M.D.
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 7900 N Milwaukee Ave, Suite 2-24, Niles, IL 60714
Phone: 847-825-0800    Fax: 847-825-0803
Dr. Jorge A Aliaga, M.D.
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: 241 Golf Mill Ctr, 728, Niles, IL 60714
Phone: 847-635-7840    Fax: 847-635-6491
James S Poulos, MD
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: 7157 W Howard St, Niles, IL 60714
Phone: 847-647-1771    
Dr. Gary Richard Fahrenbach, M.D.
Hematology & Oncology
Medicare: Accepting Medicare Assignments
Practice Location: 7411 N Milwaukee Ave, Niles, IL 60714
Phone: 773-763-1818    Fax: 773-763-9381
Dr. Sandhya Sai Sathyakumar, M.D.
Hematology & Oncology
Medicare: May Accept Medicare Assignments
Practice Location: 7900 N. Milwaukee, Ste 231, Niles, IL 60714
Phone: 847-663-9400    Fax: 847-663-9827
Madeline Sesselmann, DO
Hematology & Oncology
Medicare: Not Enrolled in Medicare
Practice Location: 7900 N Milwaukee Ave Ste 19, Niles, IL 60714
Phone: 847-318-9595    Fax: 847-318-9599

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.