Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Leonard M Klein

Individual provider Hematology & Oncology Physician · NPI 1255328878

Leonard M Klein is a Hematology & Oncology Physician in Niles, Illinois. Licensed in Illinois. Registered with an NPI since 2005.

Licensed in
IL
In the registry since
2005
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Practice location Address checks out

8915 W Golf Rd
Niles, IL 60714-5905
Phone: (847) 827-9060
Fax: (847) 827-7196
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 036064246 (IL)

Record details

NPI number1255328878
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedSeptember 29, 2005
Last updated in NPPESDecember 17, 2021
Certification dateDecember 17, 2021
Mailing address25070 Network Pl, Chicago, IL 60673-1250

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