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

Dr. William John Ernst, PSYD

Individual provider Clinical Neuropsychologist · NPI 1780892166

Dr. William John Ernst, PSYD is a Clinical Psychologist in Freehold, New Jersey. Qualified in 2000, 26 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New Jersey and Pennsylvania.

Years since qualifying
26
Licensed in
NJ, PA
In the registry since
2007
Specialties on file
2
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

495 Iron Bridge Rd Ste 8
Freehold, NJ 07728-5306
Phone: (215) 262-0741
Fax: (609) 424-3164
Show map & directions

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

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 35SI00409100 (NJ)
Clinical Neuropsychologist Taxonomy 103G00000X · Licence PS015223 (PA)

Record details

NPI number1780892166
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedMay 18, 2007
Last updated in NPPESDecember 28, 2010
Mailing address495 Iron Bridge Rd Ste 8, Freehold, NJ 07728-5306

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Freehold