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

David A Marks, PHD

Individual provider Clinical Neuropsychologist · NPI 1821150699

David A Marks, PHD is a Clinical Psychologist in Yarmouth, Maine. Graduated from Baylor College of Medicine in 1983, 43 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
43
Trained at
Baylor College of Medicine
Licensed in
ME
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

500 Route 1 Ste 26
Yarmouth, ME 04096-4712
Phone: (207) 846-3023
Fax: (207) 846-3028
Show map & directions

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

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence PS602 (ME)

Record details

NPI number1821150699
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedDecember 15, 2006
Last updated in NPPESJuly 8, 2007
Mailing address500 Route 1 Ste 26, Yarmouth, ME 04096-4712

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 1983 (43 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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