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

Dr. Leo Matthew Duggan III, PHD

Individual provider Clinical Psychologist · NPI 1134250194

Dr. Leo Matthew Duggan III, PHD is a Clinical Psychologist in Long Beach, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

4137 E 7th St
Long Beach, CA 90804-5311
Phone: (562) 433-7652
Fax: (562) 433-8152
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY11407 (CA)

Record details

NPI number1134250194
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedMarch 8, 2007
Last updated in NPPESJuly 8, 2007

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