NPIMap

Individual provider Active NPI

Thien-Kim Nguyen Co, DO

  • Nephrology Physician
  • Los Alamitos, CA
National Provider Identifier
1033732953
Registry record updated Oct 17, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nephrology PhysicianTaxonomy code 207RN0300X
License
20A20255 Issued in CA
Practice address
3851 Katella Ave Ste 325
Los Alamitos, CA 90720-3574
Phone
(562) 286-6466
NPI assigned
May 27, 2020
Last updated
Oct 17, 2026By the provider in NPPES
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Oct 17, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X NU
Internal Medicine Physician 207R00000X 20A20255 CA
Nephrology Physician 207RN0300X 20A20255 CA Primary

Addresses

Primary practice location

3851 Katella Ave Ste 325
Los Alamitos, CA 90720-3574

Mailing address

3851 Katella Ave Ste 325
Los Alamitos, CA 90720-3574
Phone (562) 286-6466

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20231016001259 CA Practitioner - Nephrology 4688029317 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nephrology
Education
Other, 2020
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

3851 Katella Ave
Suite 325
Los Alamitos, CA 90720-3574
Phone (562) 286-6466

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
20A20255CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Prohealth Partners, a Medical Group Internal Medicine Current Accepting new patients
Prohealth Partners a Medical Group CurrentSince Jul 1, 2025 Accepting new patients
Excell Integrated Medical Group Inc CurrentSince Aug 20, 2023 Accepting new patients
Prohealth Partners, a Medical Group, Inc. Internal Medicine CurrentSince Jul 1, 2025 Accepting new patients
Prohealth Partners, a Medical Group, Inc. Internal Medicine Past Accepting new patients
Prohealth Partners a Medical Group Past Accepting new patients

Locations

5750 Downey Ave
Ste 100
Lakewood, CA 90712
Phone (562) 630-3105

5750 Downey Ave
Ste 206
Lakewood, CA 90712
Phone (562) 384-3034

10861 Cherry St
Ste 104
Los Alamitos, CA 90720
Phone (562) 431-8771

3851 Katella Ave
Ste 325
Los Alamitos, CA 90720
Phone (562) 286-6466

File 54567
Los Angeles, CA 90074
Phone (310) 491-9060

14023 Paramount Blvd
Paramount, CA 90723
Phone (562) 286-6815

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Organizations & group practices 6

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

Hospital & facility affiliations 7

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1590537600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1792195200000",
    "number": "1033732953",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3851 KATELLA AVE STE 325",
            "city": "LOS ALAMITOS",
            "state": "CA",
            "postal_code": "907203574",
            "telephone_number": "562-286-6466"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3851 KATELLA AVE STE 325",
            "city": "LOS ALAMITOS",
            "state": "CA",
            "postal_code": "907203574",
            "telephone_number": "562-286-6466"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CO",
        "first_name": "THIEN-KIM",
        "middle_name": "NGUYEN",
        "credential": "DO",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2020-05-27",
        "last_updated": "2026-10-17",
        "certification_date": "2026-10-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "20A20255",
            "primary": false
        },
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "CA",
            "license": "20A20255",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Los Alamitos, CA

Sources for this page

Verify at the official NPI Registry.