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

Mr. Mark Warren Olthoff, MSW

Individual provider Clinical Social Worker · NPI 1073736484

Mr. Mark Warren Olthoff, MSW is a Clinical Social Worker in Rockford, Michigan. Licensed in Michigan. Registered with an NPI since 2007.

Licensed in
MI
In the registry since
2007
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

10075 Northland Dr NE
Rockford, MI 49341-8067
Phone: (616) 866-0265
Fax: (616) 866-0991
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 6801035615 (MI)

Record details

NPI number1073736484
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW
Sole proprietorNo
NPI enumeratedApril 11, 2007
Last updated in NPPESJuly 8, 2007
Mailing address10075 Northland Dr Ne, Rockford, MI 49341-8067

Other providers in Rockford