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

DERECK CURTIS WEI MD
NPI 1720720105
Psychiatry & Neurology - Psychiatry in Ontario, CA

Q: What is Dereck Wei's NPI number?

The NPI number for Dereck Wei is 1720720105. It was assigned to this individual provider in the NPPES registry on April 7, 2022.

Q: What is Dereck Wei's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Dereck Wei was last updated on August 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.

Active since April 07, 2022

2940 INLAND EMPIRE BLVD, ONTARIO, CA 91764(909) 458-1350 Get Directions Write a Review

NPPES record last updated: August 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 13, 2026, Apr 7, 2022 (2 updates tracked since 2022).

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About Dereck Curtis Wei Md NPPES

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

DERECK CURTIS WEI MD (NPI 1720720105) is an individual psychiatry provider in Ontario, California, licensed in California (A190956) and active in the NPI registry since April 2022. He maintains a secondary practice location in Colton.

NPPES Registry Identity

NPI1720720105

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDERECK CURTIS WEICredential: MD

Location Address2940 INLAND EMPIRE BLVDOntario, CA 91764-4898

Mailing Address400 N Pepper AveColton, CA 92324-1801 · (909) 580-1000

Phone(909) 458-1350

Sole ProprietorNo

Enumeration DateApril 7, 2022

Last NPPES UpdateAugust 13, 20262 updates tracked since enumeration

NPPES CertifiedAugust 13, 2026

✔ NPI 1720720105 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 · A190956

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.

2940 INLAND EMPIRE BLVD, Ontario, CA 91764

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Secondary Practice Location 1

Location 1400 N Pepper AveColton, CA 92324-1801 · Phone (909) 580-1000

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.

GOLEANIA CHERIC DARRETT

Counselor (Addiction (Substance Use Disorder))