Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GREGORY WILLETT MD PROF CORP
NPI 1881774743
Psychiatry & Neurology - Psychiatry in Hawthorne, CA

Q: What is Gregory Willett MD Prof Corp's NPI number?

The NPI number for Gregory Willett MD Prof Corp is 1881774743. It was assigned to this organization in the NPPES registry on October 16, 2006.

Q: What is Gregory Willett MD Prof Corp's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Active since October 16, 2006

4477 W 118TH ST, 400, HAWTHORNE, CA 90250(310) 978-0884 Get Directions Write a Review

NPPES record last updated: October 2, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

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About Gregory Willett Md Prof Corp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY WILLETT MD PROF CORP (NPI 1881774743) is a healthcare organization registered as a psychiatry in Hawthorne, California and active in the NPI registry since October 2006. The organization lists Thomas Gregory Willett, President, as its authorized official.

NPPES Registry Identity

NPI1881774743

Entity TypeOrganization

Primary Taxonomy2084P0800X

Legal Business NameGREGORY WILLETT MD PROF CORP

Location Address4477 W 118TH ST, 400Hawthorne, CA 90250-2255

Mailing Address3521 Lomita Blvd Ste 103Torrance, CA 90505-5041 · (310) 534-9131 · Fax (310) 534-6132

Phone(310) 978-0884

Organization SubpartNo

Authorized OfficialThomas Gregory WillettPresident · (310) 978-0884

Enumeration DateOctober 16, 2006

Last NPPES UpdateOctober 2, 2026

NPPES CertifiedOctober 2, 2026

✔ NPI 1881774743 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · A22826

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

4477 W 118TH ST, Hawthorne, CA 90250

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ASHOK KUMAR, M.D., A MEDICAL CORPORATION

Internal Medicine

4477 W 118TH ST, SUITE 200
HAWTHORNE, CA 90250

Los Angeles County (310) 675-4440

DR. ARTIS WOODWARD MD

Family Medicine (Sports Medicine)

4477 W 118TH ST, STE 300
HAWTHORNE, CA 90250

Los Angeles County (310) 531-8010

DR. NADER RAMZI DDS

Dentist (General Practice)

4477 W 118TH ST, 500
HAWTHORNE, CA 90250

Los Angeles County (310) 970-9255

FAYEGH VAKILI INC

Specialist

4477 W 118TH ST, SUITE 503
HAWTHORNE, CA 90250

Los Angeles County (310) 644-9500

MS. NONA PACATANG SANTOS N.P.-C

Nurse Practitioner

4477 W 118TH ST, SUITE 200
HAWTHORNE, CA 90250

Los Angeles County (310) 675-4440

DR. FAYEGH VAKILI M.D.

Orthopaedic Surgery

4477 W 118TH ST, SUITE 503
HAWTHORNE, CA 90250

Los Angeles County (310) 644-3500

MARIAN ISKANDER MD

Pediatrics

4477 W 118TH ST, 301
HAWTHORNE, CA 90250

Los Angeles County (310) 978-8026

POOJA KUMAR M.D.

Internal Medicine

4477 W 118TH ST, SUITE 200
HAWTHORNE, CA 90250

Los Angeles County (310) 675-4440

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Willett MD Prof Corp's NPI number?

The NPI number for Gregory Willett MD Prof Corp is 1881774743. It was assigned to this organization in the NPPES registry on October 16, 2006.

Where is Gregory Willett MD Prof Corp located?

Gregory Willett MD Prof Corp is located at 4477 W 118th St 400, Hawthorne, CA 90250. The listed phone number is (310) 978-0884.

What is Gregory Willett MD Prof Corp's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

When was this NPI record last updated?

The NPPES record for Gregory Willett MD Prof Corp was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.