Karren L Tan, NP

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

95018902 Issued in CA

Practice address

761 S Weir Canyon Rd Ste 185
Anaheim, CA 92808-1947

Phone

(714) 282-6934

Fax

(714) 282-6935

NPI assigned

Oct 21, 2021

Last updated

Jan 12, 2026By the provider in NPPES

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

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Healthcare Partners Affiliates Medical GroupGroup PAC ID 7315842002, 775 clinicians

Centers for Family Medicine GPGroup PAC ID 9931143799, 87 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Uci Health-Orange Hospital, Orange, CA, CCN 050348

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/ADEBBD
• Direct secure messaging: karren.tan.p33@direct.monarchhealthcare.nextgenshare.com
• Direct secure messaging: ktan194984@westdirect.optum.com

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.

• Centers for Family Medicine GP

  dba Optumcare Medical Group

  • Family Medicine Physician
  • Los Alamitos, CA
  • NPI 1467598243
  Medicare reassignment Care Compare group NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1659312593
  Medicare reassignment Care Compare group NPD
• Caduceus Physicians Medical Group

  • Family Medicine Physician
  • Yorba Linda, CA
  • NPI 1497702724
  Medicare reassignment NPD
• Minuteclinic Diagnostic Medical Group of California Inc

  • Family Nurse Practitioner
  • Burbank, CA
  • NPI 1033309372
  Medicare reassignment NPD
• Minuteclinic Diagnostic Medical Group of Orange County Inc

  • Nurse Practitioner
  • Irvine, CA
  • NPI 1104013879

  Family

  Medicare reassignment NPD
• Minuteclinic Diagnostic Medical Group of San Diego Inc

  • Family Nurse Practitioner
  • El Cajon, CA
  • NPI 1568659233
  Medicare reassignment NPD
• Oc Urgentcare Medical Group Incorporated

  • Urgent Care Clinic/Center
  • Anaheim, CA
  • NPI 1083940597
  Medicare reassignment NPD
• Healthcare Partners Affiliates Medical Group

  dba Optum

  • Durable Medical Equipment & Medical Supplies
  • Murrieta, CA
  • NPI 1760057269
  NPD
• Oc Urgentcare Medical Group Incorporated

  dba Oc Urgent Care Anaheim 2

  • Urgent Care Clinic/Center
  • Anaheim, CA
  • NPI 1124692314
  NPD

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

• University of California Irvine

  dba University of California Irvine - Cac Urgent Care

  • Urgent Care Clinic/Center
  • Irvine, CA
  • NPI 1518739309

  Hospital

  Care Compare affiliation
• University of California Irvine

  dba Uci Health

  • General Acute Care Hospital
  • Orange, CA
  • NPI 1689608150
  Care Compare affiliation

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

{
    "created_epoch": "1634774400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768176000000",
    "number": "1578226064",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35380",
            "city": "LAS VEGAS",
            "state": "NV",
            "postal_code": "891335380"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "761 S WEIR CANYON RD STE 185",
            "city": "ANAHEIM",
            "state": "CA",
            "postal_code": "928081947",
            "telephone_number": "714-282-6934",
            "fax_number": "714-282-6935"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "14330 Culver Dr",
            "address_purpose": "LOCATION",
            "city": "Irvine",
            "state": "CA",
            "postal_code": "926040303",
            "country_code": "US",
            "telephone_number": "949-559-8129",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "631 S Brookhurst St Ste 101",
            "address_purpose": "LOCATION",
            "city": "Anaheim",
            "state": "CA",
            "postal_code": "928043563",
            "country_code": "US",
            "telephone_number": "714-991-5700",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TAN",
        "first_name": "KARREN",
        "middle_name": "L",
        "credential": "NP",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2021-10-21",
        "last_updated": "2026-01-12",
        "certification_date": "2026-01-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "CA",
            "license": "95018902",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Aquilino Tan, MD
• Ashley Win Tan
• Elena Tan, CRT, RRT, NPS
• Jenny Tan, MD
• Jia Rong Tan
• Larissa R. Tan, MD
• Nicole Pineda Tan, PTA
• William Tan
• Muy Tiffany Tanahara, LVN
• Derek M Tang, M.D.

• Family Nurse Practitioner in Anaheim, CA
• Providers in Anaheim, CA by specialty
• Family Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 12, 2026; 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.