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

WILLIAM GREGORY LEMUS JR.
NPI 1255246286
Counselor - Addiction (Substance Use Disorder) in Downey, CA

Active since August 14, 2026
11501 DOLAN AVE, DOWNEY, CA 90241(562) 923-7894 Get Directions Write a Review

NPPES record added: August 14, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William Gregory Lemus Jr. NPPES

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

WILLIAM GREGORY LEMUS JR. (NPI 1255246286) is an individual addiction (substance use disorder) provider in Downey, California and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1255246286
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameWILLIAM GREGORY LEMUS JR.
Location Address11501 DOLAN AVEDowney, CA 90241-4921
Mailing Address12274 Montgomery St Apt 10Downey, CA 90242-3566 · (562) 923-7894
Phone(562) 923-7894
Sole ProprietorYes
Enumeration DateAugust 14, 2026
NPPES CertifiedAugust 14, 2026
✔ NPI 1255246286 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
11501 DOLAN AVE, Downey, CA 90241
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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.

PAUL WILLIAM LUNA
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894
ESTEL GENE MCMASTER
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894
VIRGINIA DURAN
Substance Abuse Rehabilitation Facility
11501 DOLAN AVE
DOWNEY, CALIFORNIA 90241
Los Angeles County (562) 661-0188
MR. RICHARD BRANDON REILLY LAADC
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (657) 761-1499
SARAH AGUIRRE
Counselor (Professional)
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894
ROBERT LA VOGUE CADC II
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894
DARRYL JOHNSON SR.
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894
ERNESTO WILLIAM GONZALES
Counselor (Addiction (Substance Use Disorder))
11501 DOLAN AVE
DOWNEY, CA 90241
Los Angeles County (562) 923-7894

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 William Lemus's NPI number?

The NPI number for William Lemus is 1255246286. It was assigned to this individual provider in the NPPES registry on August 14, 2026.

Where is William Lemus located?

William Lemus practices at 11501 Dolan Ave, Downey, CA 90241. The listed phone number is (562) 923-7894.

What is William Lemus'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 William Lemus was last updated on August 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.