Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Timothy Onto Ts'O, MD, PHD

Individual provider Psychiatry Physician · NPI 1689780892

Dr. Timothy Onto Ts'O, MD, PHD is a Psychiatry Physician in Libertyville, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1110 W Golf Rd
Libertyville, IL 60048-3056
Phone: (847) 680-7596
Fax: (847) 680-7351
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X (IL)

Record details

NPI number1689780892
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedAugust 21, 2006
Last updated in NPPESJuly 8, 2007

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