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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

MR. SIMON MATT MENDEZ CADC II
NPI 1750293775
Counselor - Addiction (Substance Use Disorder) in Long Beach, CA

Active since September 22, 2026
3939 ATLANTIC AVE STE 102, LONG BEACH, CA 90807(562) 471-7710 Get Directions Write a Review

NPPES record added: September 22, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About Mr. Simon Matt Mendez Cadc Ii NPPES

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

MR. SIMON MATT MENDEZ CADC II (NPI 1750293775) is an individual addiction (substance use disorder) provider in Long Beach, California and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1750293775
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameMR. SIMON MATT MENDEZCredential: CADC II
Location Address3939 ATLANTIC AVE STE 102Long Beach, CA 90807-3535
Mailing Address15902 Sweet PlHacienda Heights, CA 91745-3528 · (626) 543-5713
Phone(562) 471-7710
Sole ProprietorYes
Enumeration DateSeptember 22, 2026
NPPES CertifiedSeptember 22, 2026
✔ NPI 1750293775 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
3939 ATLANTIC AVE STE 102, Long Beach, CA 90807
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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.

ELIEZEL RIVERA
Counselor (Addiction (Substance Use Disorder))
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 263-4733
LORI WAY M.A.
Marriage & Family Therapist
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 249-5731
CHAD T SJULE RAC
Counselor (Addiction (Substance Use Disorder))
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 350-9346
DESIREE ROSAS
Counselor (Addiction (Substance Use Disorder))
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 471-7710
MS. STEPHANIE LYN KOONTZ
Counselor (Addiction (Substance Use Disorder))
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 473-0830
NICHOLAS MAHONEY REBEL AMFT
Marriage & Family Therapist
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 471-7710
DR. DIANA KANG PSYD
Psychologist (Clinical)
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 473-0827
ROOTS ADDICTION & PSYCHIATRY MEDICAL GROUP, PC
Clinic/Center (Adult Mental Health)
3939 ATLANTIC AVE STE 102
LONG BEACH, CA 90807
Los Angeles County (562) 583-9345

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 Simon Mendez's NPI number?

The NPI number for Simon Mendez is 1750293775. It was assigned to this individual provider in the NPPES registry on September 22, 2026.

Where is Simon Mendez located?

Simon Mendez practices at 3939 Atlantic Ave Ste 102, Long Beach, CA 90807. The listed phone number is (562) 471-7710.

What is Simon Mendez's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Simon Mendez was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.