Courtney L. Warren, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

1467-23 Issued in WI

Practice address

1033 N Mayfair Rd Ste 101
Wauwatosa, WI 53226-3442

Phone

(414) 454-0600

Fax

(414) 454-0971

NPI assigned

Mar 2, 2006

Last updated

Feb 5, 2026By the provider in NPPES

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

Other names 1

• Courtney L. Johnson Former name

Medicare fee-for-service enrollment

Enrolled in WI

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

Physician Assistant

Education

Other, 2002

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Gastroenterology Specialists SCGroup PAC ID 3375626195, 29 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

85.73 of 100Reported as group

Quality

58.78

Promoting interoperability

95

Improvement activities

40

Cost

88.4

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

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.

• Gastroenterology Specialists SC

  • Gastroenterology Physician
  • Waukesha, WI
  • NPI 1558443549
  Medicare reassignment Care Compare group NPD
• Gi Associates LLC

  • Gastroenterology Physician
  • Milwaukee, WI
  • NPI 1801863501
  Medicare reassignment
• Cardiovascular Associates of Wisconsin, LLP

  • Cardiovascular Disease Physician
  • Milwaukee, WI
  • NPI 1841286291
  NPD (past)

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

{
    "created_epoch": "1141257600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770249600000",
    "number": "1275500977",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2801 W KINNICKINNIC RIVER PKWY STE 1080",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532153689",
            "telephone_number": "414-908-6615",
            "fax_number": "414-908-6634"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1033 N MAYFAIR RD STE 101",
            "city": "WAUWATOSA",
            "state": "WI",
            "postal_code": "532263442",
            "telephone_number": "414-454-0600",
            "fax_number": "414-454-0971"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WARREN",
        "first_name": "COURTNEY",
        "middle_name": "L.",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-03-02",
        "last_updated": "2026-02-05",
        "certification_date": "2026-02-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "WI",
            "license": "1467-23",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "COURTNEY",
            "last_name": "JOHNSON",
            "middle_name": "L.",
            "credential": "PA-C",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Weili Wang, MD
• Lee S Wann, M.D.
• Warby Parker Inc.
• Alison Ward, APNP
• James Thomas Ward, D.D.S.
• Tyler Waskosky
• Ashley Watson
• Geoffrey B Watters, NP
• Sayeh Bozorghadad Watts
• Wauwatosa Dental Group SC

• Physician Assistant in Wauwatosa, WI
• Providers in Wauwatosa, WI by specialty
• Physician Assistant in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 5, 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.