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
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
Mailing address5308 Harroun Rd, Suite 055, Sylvania, OH 43560-2114

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