Karen Isak, RN

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

157471 Issued in CA

Practice address

20 River Park PL W Fresno Ca 93720
Fresno, CA 93724-0001

Phone

(916) 202-6761

NPI assigned

Jan 9, 2024

Sex

Female

Sole proprietor

No

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

Enrollment records 1

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Valley Regional Anesthesia Associates IncGroup PAC ID 3870964323, 143 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Emanuel Medical Center Hospital, Turlock, CA, CCN 050179

Medicare enrollment (NPD)

Enrolled

Credentials

Registered Nurse

State licenses

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.

• Valley Regional Anesthesia Associates Inc

  • Anesthesiology Physician
  • Fresno, CA
  • NPI 1578272415
  Medicare reassignment Care Compare group

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

• Doctors Medical Center of Modesto, Inc.

  • General Acute Care Hospital
  • Turlock, CA
  • NPI 1396087672
  Care Compare affiliation

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

{
    "created_epoch": "1704758400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770681600000",
    "number": "1174394274",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9006 MORGANFIELD PL",
            "city": "ELK GROVE",
            "state": "CA",
            "postal_code": "956243608",
            "telephone_number": "916-202-6761"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20 RIVER PARK PL W FRESNO CA 93720",
            "city": "FRESNO",
            "state": "CA",
            "postal_code": "937240001",
            "telephone_number": "916-202-6761"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ISAK",
        "first_name": "KAREN",
        "name_prefix": "Mrs.",
        "credential": "RN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-01-09",
        "last_updated": "2026-02-10",
        "certification_date": "2026-02-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "CA",
            "license": "157471",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Wajiha Irshad, M.D.
• Irvine Cottages, LLC
• Crystal Lee Irwin Warren, D.O.
• Isabella Aguilar C Isabella Aguilar
• Isaiah Fuson Optometry Corporation
• Lee Anne Ishmael, BCBA
• Mytzy Isidoro
• Tania Isidra-Damaso
• Mohammed Shafayetul Islam
• Sami Afrin Islam

• Certified Registered Nurse Anesthetist in Fresno, CA
• Providers in Fresno, CA by specialty
• Certified Registered Nurse Anesthetist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 10, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.