Thais Siewert, PMHNP

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

95014585 Issued in CA

Practice address

888 Prospect St Ste 200
La Jolla, CA 92037-4261

Phone

(415) 849-2466

Fax

(415) 376-4529

NPI assigned

May 21, 2020

Sex

Female

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other names 1

• Dr. Thais Nan Kim Other name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: No
• Medical equipment: Yes
• Home health: No
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Merit-based Incentive Payment System (MIPS)

Final score

81.67 of 100Reported as group

Quality

74.98

Improvement activities

40

Cost

51.43

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Calmsphere, a Nursing Corporation

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Newport Beach, CA
  • NPI 1154284248
  NPD Authorized official
• Lat Intensive Outpatient Programs Inc

  • Community/Behavioral Health Agency
  • Marina del Rey, CA
  • NPI 1306265954
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1590019200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764115200000",
    "number": "1194348318",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "17595 HARVARD AVE",
            "address_2": "STE C, #169",
            "city": "IRVINE",
            "state": "CA",
            "postal_code": "926148574",
            "telephone_number": "949-424-5444"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "888 PROSPECT ST STE 200",
            "city": "LA JOLLA",
            "state": "CA",
            "postal_code": "920374261",
            "telephone_number": "415-849-2466",
            "fax_number": "415-376-4529"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1390 Market St Ste 200",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941025404",
            "country_code": "US",
            "telephone_number": "415-849-2466",
            "fax_number": "415-376-4529",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4685 MacArthur Ct Ste 340",
            "address_purpose": "LOCATION",
            "city": "Newport Beach",
            "state": "CA",
            "postal_code": "926601855",
            "country_code": "US",
            "telephone_number": "949-424-4544",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIEWERT",
        "first_name": "THAIS",
        "name_prefix": "Dr.",
        "credential": "PMHNP",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2020-05-21",
        "last_updated": "2025-11-26",
        "certification_date": "2025-11-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "CA",
            "license": "95014585",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "THAIS",
            "last_name": "KIM",
            "middle_name": "NAN",
            "prefix": "DR.",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Abigail Christine Siana
• Jason Keith Sicklick, M.D.
• Faryal Asad Siddiqui, MD
• Jordan Andrew Siegel, MD
• Michael E Siegel, M.D.
• Gary Michael Sigafoos, D.D.S.
• Darren Sigal, MD
• Cassie Lynn Sigler, AMFT, APPC
• Jamie Marianne Signorino, DDS,MSD
• Alexandra Silberstein, PA-C

• Psychiatric/Mental Health Nurse Practitioner in La Jolla, CA
• Providers in La Jolla, CA by specialty
• Psychiatric/Mental Health Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 26, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.