Katharine Cella Fash, FNP

Primary specialty

Nurse PractitionerTaxonomy code 363L00000X

License

2019000563 Issued in MO

Practice address

1044 N Mason Rd
Div Im General Med, Ste 330
Saint Louis, MO 63141-6431

Phone

(314) 996-8103

Fax

(314) 996-3230

NPI assigned

Jan 8, 2019

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 identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MO

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

Vanderbilt University School of Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Washington UniversityGroup PAC ID 9830008770, 2,968 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

84.2 of 100Reported as group

Quality

71.6

Promoting interoperability

100

Improvement activities

40

Cost

75.75

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

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.

• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1992746903
  Medicare reassignment Care Compare group
• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1134169568
  NPD (past)

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

{
    "created_epoch": "1546905600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750291200000",
    "number": "1598238917",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7412011",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606742011",
            "telephone_number": "314-996-8103",
            "fax_number": "314-996-3230"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1044 N MASON RD",
            "address_2": "DIV IM GENERAL MED, STE 330",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631416431",
            "telephone_number": "314-996-8103",
            "fax_number": "314-996-3230"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FASH",
        "first_name": "KATHARINE",
        "middle_name": "CELLA",
        "name_prefix": "Mrs.",
        "credential": "FNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-01-08",
        "last_updated": "2025-06-19",
        "certification_date": "2025-06-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MO",
            "license": "2019000563",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "420070260",
            "state": "MO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1044 N Mason Rd",
            "address_2": "Div IM General Med, Ste 330",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631416431",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Eric Lee Farthing Jr., PHARMD
• Saurab Faruque
• Victor Horace Farwell, LCSW
• Farida Farzana, MD
• Megan Therese Fasanella, D.M.D.
• Grace Fasnut, M.A. CCC-SLP
• Michelle Fassler, CSW
• Fast Track Medical LLC
• Fast Track Medical LLC
• Fast Track Medical LLC

• Nurse Practitioner in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Nurse Practitioner in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 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.