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

Mr. Mark Joseph Thalheimer, MSW

Individual provider Mental Health Counselor · NPI 1245381508

Mr. Mark Joseph Thalheimer, MSW is a Mental Health Counselor in Wilmington, Delaware. Licensed in Delaware. Registered with an NPI since 2007.

Licensed in
DE
In the registry since
2007
Specialties on file
2
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.

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Practice location Address checks out

500 W 10th St
Wilmington, DE 19801-1422
Phone: (302) 984-3380
Fax: (302) 984-3324
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence Q1-0000617 (DE)
Clinical Social Worker Taxonomy 1041C0700X · Licence Q1-0000617 (DE)

Record details

NPI number1245381508
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW
Sole proprietorNo
NPI enumeratedJanuary 15, 2007
Last updated in NPPESJanuary 19, 2012

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