Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Joseph W Tietz

Preferred Provider Organization in Berkeley, CA · enumerated 2015 · authorized official Joseph Tietz, Clinical Psychologist.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1649668377

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Joseph W Tietz

Practice address 1538 Edith St, Berkeley, CA, 94703

Phone (510) 912-3438

Enumeration date Jan 5, 2015

Last updated in NPPES Jan 5, 2015

Taxonomy & classification

305R00000X Preferred Provider Organization Managed Care Organizations · License 22884 (CA) Primary

Authorized official

Name Joseph Tietz

Title Clinical Psychologist

Phone (510) 912-3438

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2015-01-05. Verify at npiregistry.cms.hhs.gov.

Where is Joseph W Tietz located?

The practice location on file with NPPES is in Berkeley, CA.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-05.