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

Mr. David Francis Timmer, MSW

Individual provider Clinical Social Worker · NPI 1639286552

Mr. David Francis Timmer, MSW is a Clinical Social Worker in Hales Corners, Wisconsin. Qualified in 1989, 37 years ago. Practices with Trillium Care Group LLC, a 4-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
37
Licensed in
WI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.

See every abbreviation used in this directory →

Practice location Address checks out

5300 S 108th St 12B
Hales Corners, WI 53130-1368
Phone: (414) 529-2591
Fax: (414) 529-2669
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 1722 123 (WI)
Marriage & Family Therapist Taxonomy 106H00000X · Licence 284 124 (WI)

Record details

NPI number1639286552
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW
Sole proprietorYes
NPI enumeratedAugust 24, 2006
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Group practice Trillium Care Group Llc — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Hales Corners