Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Thais Siewert, PMHNP

Psychiatric/Mental Health Nurse Practitioner in La Jolla, CA · enumerated 2020.

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

National Provider Identifier

1194348318

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Thais Siewert

Credential PMHNP

Sex Female

Practice address La Jolla, CA, 92037

Phone (415) 849-2466

Fax (415) 376-4529

Enumeration date May 21, 2020

Last updated in NPPES Nov 26, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95014585 (CA) Primary

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

What is the NPI number for Thais Siewert?

The National Provider Identifier (NPI) for Thais Siewert is 1194348318, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thais Siewert practice?

The practice location on file with NPPES is in La Jolla, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-26.