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

Dr. David Kent Diffee, PHD

Individual provider Addiction (Substance Use Disorder) Psychologist · NPI 1790870590

Dr. David Kent Diffee, PHD is an Addiction (Substance Use Disorder) Psychologist in Denver, Colorado. Licensed in Colorado. Registered with an NPI since 2006.

Licensed in
CO
In the registry since
2006
Specialties on file
3
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

1777 S Harrison St Ste 407
Denver, CO 80210
Phone: (303) 757-4399
Fax: (303) 757-4547
Show map & directions

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

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 2074 (CO)
Addiction (Substance Use Disorder) Psychologist Taxonomy 103TA0400X · Licence 4379 (CO)
Clinical Psychologist Taxonomy 103TC0700X · Licence 2074 (CO)

Record details

NPI number1790870590
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedOctober 4, 2006
Last updated in NPPESSeptember 11, 2025

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