Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mark Louis Simpson, PHD, CCC/SLP

Individual provider Speech-Language Pathologist · NPI 1316055379

Dr. Mark Louis Simpson, PHD, CCC/SLP is a Speech-Language Pathologist in Detroit, Michigan. Registered with an NPI since 2006.

In the registry since
2006
What do these letters mean?
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

4100 John R St Karmanos Cancer Center-Wertz Clinic
Detroit, MI 48201-2013
Phone: (800) 527-6266
Fax: (313) 576-8381
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Speech-Language Pathologist (primary) Taxonomy 235Z00000X

Record details

NPI number1316055379
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , CCC/SLP
Sole proprietorNo
NPI enumeratedAugust 29, 2006
Last updated in NPPESMarch 27, 2018

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