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

Dr. Robert Frank Mannis, PHD

Individual provider Psychologist · NPI 1831224906

Dr. Robert Frank Mannis, PHD is a Psychologist in Frederick, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2007
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

235 Wes Patrick St Robert F Mannis Phd
Frederick, MD 21701
Phone: (301) 662-4160
Fax: (301) 620-4344
Show map & directions

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

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 2233 (MD)
Psychologist Taxonomy 103T00000X · Licence 02233 (MD)

Record details

NPI number1831224906
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedFebruary 22, 2007
Last updated in NPPESOctober 31, 2011
Mailing address235 Wes Patrick St, Robert F. Mannis Phd, Frederick, MD 21701

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