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

Mark Leslie Nelson, PHD

Individual provider Clinical Psychologist · NPI 1508189911

Mark Leslie Nelson, PHD is a Clinical Psychologist in Bel Air, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2010
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

115 E Churchville Rd
Bel Air, MD 21014-3801
Phone: (443) 226-3868
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 03906 (MD)

Record details

NPI number1508189911
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMarch 12, 2010
Last updated in NPPESMarch 12, 2010
Mailing address115 E Churchville Rd, Bel Air, MD 21014-3801

Other providers in Bel Air