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JOHN WALTER MARSHALL SUDCC
NPI 1285394114
Counselor - Addiction (Substance Use Disorder) in San Diego, CA

Active since December 20, 2021
4065 3RD AVE, SAN DIEGO, CA 92103(619) 515-2545 Get Directions Write a Review

NPPES record last updated: February 26, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Feb 26, 2025, Jan 15, 2023, Jan 12, 2022 and 1 more (4 updates tracked since 2021).

About John Walter Marshall Sudcc NPPES

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

JOHN WALTER MARSHALL SUDCC (NPI 1285394114) is an individual addiction (substance use disorder) provider in San Diego, California, licensed in California (12527) and active in the NPI registry since December 2021.

NPPES Registry Identity

NPI1285394114
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameJOHN WALTER MARSHALLCredential: SUDCC
Location Address4065 3RD AVESan Diego, CA 92103-2184
Mailing Address6515 Glenroy StSan Diego, CA 92120-2715 · (619) 756-1537
Phone(619) 515-2545
Sole ProprietorNo
Enumeration DateDecember 20, 2021
Last NPPES UpdateFebruary 26, 20254 updates tracked since enumeration
NPPES CertifiedFebruary 26, 2025
✔ NPI 1285394114 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
License✔ Licensed in CA · 12527
4065 3RD AVE, San Diego, CA 92103
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Other Providers at the Same Location NPPES 5

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

DR. JOSEPH BRAUFMAN STEIN M.D.
Internal Medicine
4065 3RD AVE, SUITE 101
SAN DIEGO, CA 92103
San Diego County (619) 296-3800
JOE ANTHONY SEPULVEDA M.D.
Psychiatry & Neurology (Psychiatry)
4065 3RD AVE
SAN DIEGO, CA 92103
San Diego County (619) 255-5120
FAMILY HEALTH CENTERS OF SAN DIEGO, INC.
Clinic/Center (Federally Qualified Health Center (FQHC))
4065 3RD AVE
SAN DIEGO, CA 92103
San Diego County (619) 515-2545
JORDAN SHEARED GUTIERREZ LCSW
Social Worker (Clinical)
4065 3RD AVE
SAN DIEGO, CA 92103
San Diego County (619) 515-2419
ANTHONY P. POTENTE, MS, DDS, APC
Dentist (Endodontics)
4065 3RD AVE, SUITE 300
SAN DIEGO, CA 92103
San Diego County (619) 298-2291

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 John Marshall's NPI number?

The NPI number for John Marshall is 1285394114. It was assigned to this individual provider in the NPPES registry on December 20, 2021.

Where is John Marshall located?

John Marshall practices at 4065 3rd Ave, San Diego, CA 92103. The listed phone number is (619) 515-2545.

What is John Marshall'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 John Marshall was last updated on February 26, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.