Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mark M. Horwitz, MS, CCC-SLP

Individual provider Speech-Language Pathologist · NPI 1154557346

Mark M. Horwitz, MS, CCC-SLP is a Speech-Language Pathologist in Philadelphia, Pennsylvania. Licensed in Pennsylvania. Registered with an NPI since 2009.

Licensed in
PA
In the registry since
2009
What do these letters mean?
MS — Master of Science
A graduate science degree.
CCC-SLP — Certificate of Clinical Competence in Speech-Language Pathology
A speech-language pathologist certified by ASHA.

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Practice location Address checks out

425 Glen Echo Rd
Philadelphia, PA 19119-2915
Phone: (215) 500-6445
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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 · Licence SL 010720 (PA)

Record details

NPI number1154557346
Entity typeIndividual (Type 1)
GenderMale
Credentials MS , CCC-SLP
Sole proprietorNo
NPI enumeratedJune 2, 2009
Last updated in NPPESSeptember 9, 2013

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