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WALTER REED CALLEN
NPI 1972451854
Peer Specialist in Oakland, CA

Active since March 17, 2026
9410 MACARTHUR BLVD APT 301, OAKLAND, CA 94605(510) 372-7464 Get Directions Write a Review

NPPES record last updated: March 17, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Walter Reed Callen NPPES

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

WALTER REED CALLEN (NPI 1972451854) is an individual peer specialist in Oakland, California, licensed in (164X000000X) and active in the NPI registry since March 2026.

NPPES Registry Identity

NPI1972451854
Entity TypeIndividualMale
Primary Taxonomy175T00000X
Provider Legal NameWALTER REED CALLEN
Location Address9410 MACARTHUR BLVD APT 301Oakland, CA 94605-4738
Mailing Address9410 Macarthur Blvd Apt 301Oakland, CA 94605-4738 · (510) 372-7464
Phone(510) 372-7464
Sole ProprietorYes
Enumeration DateMarch 17, 2026
NPPES CertifiedMarch 17, 2026
✔ NPI 1972451854 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPeer SpecialistOther Service Providers
Taxonomy Code175T00000X
License✔ Licensed · 164X000000X
Definition
Individuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans Affairs or a state mental health department/certification/licensing authority.
Also ListedLicensed Vocational NurseTaxonomy 164X00000X · License 735367 (CA)
9410 MACARTHUR BLVD APT 301, Oakland, CA 94605
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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 Walter Callen's NPI number?

The NPI number for Walter Callen is 1972451854. It was assigned to this individual provider in the NPPES registry on March 17, 2026.

Where is Walter Callen located?

Walter Callen practices at 9410 Macarthur Blvd Apt 301, Oakland, CA 94605. The listed phone number is (510) 372-7464.

What is Walter Callen's specialty?

The primary specialty registered for this NPI is Peer Specialist with taxonomy code 175T00000X.

When was this NPI record last updated?

The NPPES record for Walter Callen was last updated on March 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.