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

HERMAN O. ALEXANDER CADTP 5390-R
NPI 1457918732
Counselor - Addiction (Substance Use Disorder) in San Francisco, CA

Active since May 22, 2019
1111 MARKET ST, SAN FRANCISCO, CA 94103(415) 863-3883(415) 863-7343 Get Directions Write a Review

NPPES record last updated: July 26, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 26, 2026, Jul 13, 2020, May 22, 2019 (3 updates tracked since 2019).

About Herman O. Alexander Cadtp 5390-r NPPES

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

HERMAN O. ALEXANDER CADTP 5390-R (NPI 1457918732) is an individual addiction (substance use disorder) provider in San Francisco, California, licensed in California (5390-R) and active in the NPI registry since May 2019.

NPPES Registry Identity

NPI1457918732
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameHERMAN O. ALEXANDERCredential: CADTP 5390-R
Location Address1111 MARKET STSan Francisco, CA 94103-1509
Mailing Address1111 Market StSan Francisco, CA 94103-1589 · (415) 863-3883 · Fax (415) 863-7343
Phone(415) 863-3883
Fax(415) 863-7343
Sole ProprietorYes
Enumeration DateMay 22, 2019
Last NPPES UpdateJuly 26, 20263 updates tracked since enumeration
NPPES CertifiedJuly 13, 2020
✔ NPI 1457918732 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 · 5390-R
1111 MARKET ST, San Francisco, CA 94103
Open in Google Maps ↗

Other Identifiers 1

Medicaid5390-RCA

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.

ERIN MAUREEN SMITH FNP
Nurse Practitioner (Family)
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883
MARVA B AUSTIN
Specialist
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883
KEIKO GRACE
Counselor (Addiction (Substance Use Disorder))
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883
KIMBERLY CHOW
Student in an Organized Health Care Education/Training Program
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883
BARBARA KAY DARBY I
Counselor (Addiction (Substance Use Disorder))
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883
MR. DAVID M. VERGI
Counselor (Addiction (Substance Use Disorder))
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3886
SIEFU T TSEGAY
Licensed Vocational Nurse
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (510) 712-3174
GEOFFREY JOSEPH EDEVANE SUD COUNSELOR
Counselor (Addiction (Substance Use Disorder))
1111 MARKET ST
SAN FRANCISCO, CA 94103
San Francisco County (415) 863-3883

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 Herman Alexander's NPI number?

The NPI number for Herman Alexander is 1457918732. It was assigned to this individual provider in the NPPES registry on May 22, 2019.

Where is Herman Alexander located?

Herman Alexander practices at 1111 Market St, San Francisco, CA 94103. The listed phone number is (415) 863-3883.

What is Herman Alexander'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 Herman Alexander was last updated on July 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.