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

Timothy R Wassenaar, MD

Individual provider Internal Medicine Physician · NPI 1518928993

Timothy R Wassenaar, MD is a Hematology/Oncology in Waukesha, Wisconsin. Qualified in 2002, 24 years ago. Practices with Prohealth Medical Group Inc, a 472-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
24
Licensed in
WI
In the registry since
2006
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

N16W24131 Riverwood Dr
Waukesha, WI 53188-1106
Phone: (262) 696-5690
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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 46327 (WI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 46327 (WI)

Record details

NPI number1518928993
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 28, 2006
Last updated in NPPESJanuary 10, 2024
Certification dateJanuary 10, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice Prohealth Medical Group Inc — 472 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations7 on file with Medicare

Other providers in Waukesha