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

Dr. Heather Sassman, PHD

Individual provider Clinical Psychologist · NPI 1346734951

Dr. Heather Sassman, PHD is a Clinical Psychologist in Belleville, Illinois. Works from 2 locations. Licensed in Illinois, Maryland and Missouri.

Licensed in
IL, MD, MO
In the registry since
2018
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

144 Lincoln Place Ct Ste 3
Belleville, IL 62221-5878
Phone: (618) 671-9283
Show map & directions

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

Additional practice locations (1)

  • 12680 Olive Blvd Ste 200, Saint Louis, MO 63141-6322 — (314) 872-3345

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 071021005 (IL)
Clinical Psychologist Taxonomy 103TC0700X · Licence 06219 (MD)
Clinical Psychologist Taxonomy 103TC0700X · Licence 2021036324 (MO)

Record details

NPI number1346734951
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedJune 18, 2018
Last updated in NPPESJune 23, 2025
Certification dateJune 23, 2025
Mailing address144 Lincoln Place Ct Ste 3, Belleville, IL 62221-5878