Gary Richard Simpson

Gary Richard Simpson is a Psychologist provider (Psychologist) practicing in Mashpee, MA, registered in the NPPES registry with NPI 1649472697 since 2007. Practices at Assessment and Treatment Associates, LLC (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1649472697
Entity type	Individual (Type 1)
Name	Gary Richard Simpson
Sex	Male
Practice address	400 NATHAN ELLIS HWY, SUITE 1, Mashpee, MA, 02649
Phone	5084775488
Fax	5084779334
Enumeration date	2007-06-01
Last updated in NPPES	2007-07-08

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
103T00000X	Psychologist	Primary	8470	MA

Copy-ready billing details

Provider: Gary Simpson
NPI: 1649472697
Taxonomy: 103T00000X (Psychologist)
Address: 400 NATHAN ELLIS HWY, SUITE 1, Mashpee, MA, 02649

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1669428561	Elizabeth Callard	Individual	Mental Health Counselor	Mashpee, MA
1407926652	Linda Pittella	Individual	Clinical Social Worker	Mashpee, MA
1720159932	Karen Clow-Milroy	Individual	Mental Health Counselor	Mashpee, MA
1598830986	Angela Leblanc	Individual	Mental Health Counselor	Mashpee, MA
1497803563	John Bonino	Individual	Counselor	Mashpee, MA
1184756678	Susan Foley	Individual	Clinical Social Worker	Mashpee, MA
1760693741	Janine Hemstead	Individual	Marriage & Family Therapist	Mashpee, MA
1629270673	Dennis Klass	Individual	Counselor	Mashpee, MA

Verify this record

Cross-check NPI 1649472697 against the authoritative CMS record: view Gary Richard Simpson 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

Is NPI 1649472697 active?

Yes — as of the latest NPPES snapshot, NPI 1649472697 is active (record last updated 2007-07-08).

How do I verify Gary Simpson's NPI record?

Cross-check NPI 1649472697 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.