DR. ANDREW RAY TREN CHANG MD
NPI 1447001102
Psychiatry & Neurology - Psychiatry in San Mateo, CA

Q: What is Andrew Chang's NPI number?

The NPI number for Andrew Chang is 1447001102. It was assigned to this individual provider in the NPPES registry on April 1, 2024.

Q: What is Andrew Chang'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 Andrew Chang was last updated on June 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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 01, 2024

222 W 39TH AVE, SAN MATEO, CA 94403(650) 954-0544 Get Directions Write a Review

NPPES record last updated: June 18, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jun 18, 2025, Mar 17, 2025, Sep 23, 2024 and 1 more (4 updates tracked since 2024).

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About Dr. Andrew Ray Tren Chang Md NPPES

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

DR. ANDREW RAY TREN CHANG MD (NPI 1447001102) is an individual psychiatry provider in San Mateo, California, licensed in California (15634) and active in the NPI registry since April 2024.

NPPES Registry Identity

NPI1447001102

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. ANDREW RAY TREN CHANGCredential: MD

Location Address222 W 39TH AVESan Mateo, CA 94403-4364

Mailing Address222 W 39th AveSan Mateo, CA 94403-4364

Phone(650) 954-0544

Sole ProprietorNo

Enumeration DateApril 1, 2024

Last NPPES UpdateJune 18, 20254 updates tracked since enumeration

NPPES CertifiedJune 18, 2025

✔ NPI 1447001102 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 · 15634

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.

222 W 39TH AVE, San Mateo, CA 94403

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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.

DR. LORENA MICHEL PSY.D.

Psychologist (Clinical)