Dr. Derrick Lawrence Hassert, PH.D.

Dr. Derrick Lawrence Hassert is a Mental Health Counselor provider (Counselor) practicing in Matteson, IL, registered in the NPPES registry with NPI 1578902912 since 2013. The credential PHD stands for Doctor of Philosophy.

✓ Active NPI ✓ Valid NPI checksum

NPI	1578902912
Entity type	Individual (Type 1)
Name	Dr. Derrick Lawrence Hassert
Credential	PH.D.
Sex	Male
Practice address	3624 216TH ST, Matteson, IL, 60443
Phone	8152744879
Enumeration date	2013-06-19
Last updated in NPPES	2018-11-16

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
101YM0800X	Mental Health Counselor	Secondary	39003117A	IN
101YM0800X	Mental Health Counselor	Primary	180.010878	IL

PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Copy-ready billing details

Provider: Derrick Hassert, PH.D.
NPI: 1578902912
Taxonomy: 101YM0800X (Mental Health Counselor)
Address: 3624 216TH ST, Matteson, IL, 60443

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1205043437	Changing Perspectives, Inc.	Organization	Professional Counselor	Matteson, IL
1457793127	Center for Mindfulness and Psychotherapy Inc	Organization	Clinical Psychologist	Matteson, IL
1104254937	Sophie Littleton	Individual	Professional Counselor	Matteson, IL
1962873943	Darrell Troupe	Individual	Professional Counselor	Matteson, IL
1730663782	Jason Hickmott	Individual	Professional Counselor	Matteson, IL
1306490420	Jeanne Weber	Individual	Professional Counselor	Matteson, IL
1366085920	Christienne Dyslin	Individual	Clinical Psychologist	Matteson, IL
1902494362	Elizabeth Mabbott	Individual	Mental Health Counselor	Matteson, IL

Verify this record

Cross-check NPI 1578902912 against the authoritative CMS record: view Dr. Derrick Lawrence Hassert on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

What is the NPI number for Derrick Hassert?

The National Provider Identifier (NPI) for Derrick Hassert is 1578902912, a Type 1 (individual) record in the CMS NPPES registry.

Where does Derrick Hassert practice?

The practice location on file with NPPES is in Matteson, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-11-16.