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

Dr. Sumner Jay Sydeman, PHD

Individual provider Clinical Psychologist · NPI 1376755843

Dr. Sumner Jay Sydeman, PHD is a Clinical Psychologist in Flagstaff, Arizona. Practices as a sole proprietor. Licensed in Arizona.

Licensed in
AZ
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

617 N Humphreys St Ste 101
Flagstaff, AZ 86001-3063
Phone: (928) 779-3783
Fax: (928) 773-1150
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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 3538 (AZ)

Record details

NPI number1376755843
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMay 4, 2007
Last updated in NPPESApril 28, 2008
Mailing address617 N Humphreys St Ste 101, Flagstaff, AZ 86001-3063

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