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

Dr. Henry A Willis, PHD

Individual provider Clinical Psychologist · NPI 1275154577

Dr. Henry A Willis, PHD is a Clinical Psychologist in Washington, District of Columbia. Practices as a sole proprietor. Licensed in Maryland and New York.

Licensed in
MD, NY
In the registry since
2020
Specialties on file
2
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

3801 Georgia Ave NW Apt 303
Washington, DC 20011-5899
Phone: (601) 214-7193
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 025791 (NY)
Clinical Psychologist Taxonomy 103TC0700X · Licence 07423 (MD)

Record details

NPI number1275154577
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedApril 28, 2020
Last updated in NPPESJuly 7, 2025
Certification dateJuly 7, 2025

Other providers in Washington