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

William L Horvath, MD

Individual provider Hematology & Oncology Physician · NPI 1023015351

William L Horvath, MD is a Hematology & Oncology Physician in Sylvania, Ohio. Licensed in Michigan and Ohio. Registered with an NPI since 2005.

Licensed in
MI, OH
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

5308 Harroun Rd Ste 055
Sylvania, OH 43560-2114 Not confirmed with CMS for 14 years — call before visiting
Phone: (419) 824-6599
Fax: (419) 885-3870
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 35038120 (OH)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 4301058940 (MI)

Record details

NPI number1023015351
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 1, 2005
Last updated in NPPESMay 1, 2012

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