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

Dr. Eric John Niemeyer, PSYD

Individual provider Addiction (Substance Use Disorder) Psychologist · NPI 1154584894

Dr. Eric John Niemeyer, PSYD is an Addiction (Substance Use Disorder) Psychologist in Vacaville, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2008
Specialties on file
3
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

See every abbreviation used in this directory →

Practice location Address checks out

421 Nut Tree Rd
Vacaville, CA 95688
Phone: (707) 624-7500
Fax: (707) 624-7501
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 25842 (CA)
Addiction (Substance Use Disorder) Psychologist Taxonomy 103TA0400X
Health Service Psychologist Taxonomy 103TH0100X

Record details

NPI number1154584894
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedJuly 2, 2008
Last updated in NPPESDecember 8, 2022
Certification dateDecember 8, 2022