William Arthur Grass, ARNP

Primary specialty

Critical Care Medicine Nurse PractitionerTaxonomy code 363LC0200X

License

ARNP9207097 Issued in FL

Practice address

10 Barnes West Dr
Creve Coeur, MO 63141-6287

Phone

(314) 996-8270

NPI assigned

Jul 13, 2005

Last updated

Jul 30, 2025By the provider in NPPES

Sex

Male

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 2

Medicare fee-for-service enrollment

Enrolled in FL

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

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

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.

• Florida Cancer Specialists & Research Institute, LLC

  • Medical Oncology Physician
  • Cape Coral, FL
  • NPI 1760590962
  Medicare reassignment NPD
• Gulf-to-Bay Anesthesiology Associates LLC

  • Anesthesiology Physician
  • Tampa, FL
  • NPI 1720039746
  NPD (past)
• Michigan Gulf to Bay Anesthesiology Associates PSC

  • Anesthesiology Physician
  • Lake Orion, MI
  • NPI 1184839839
  NPD (past)
• Oncology Physicians PA

  • Medical Oncology Physician
  • Clearwater, FL
  • NPI 1265430136
  NPD (past)

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

{
    "created_epoch": "1121212800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753833600000",
    "number": "1407854383",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 BARNES JEWISH HOSPITAL PLZ",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631101003",
            "telephone_number": "314-747-3000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10 BARNES WEST DR",
            "city": "CREVE COEUR",
            "state": "MO",
            "postal_code": "631416287",
            "telephone_number": "314-996-8270"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRASS",
        "first_name": "WILLIAM",
        "middle_name": "ARTHUR",
        "credential": "ARNP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-13",
        "last_updated": "2025-07-30",
        "certification_date": "2025-07-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LC0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Critical Care Medicine",
            "state": "FL",
            "license": "ARNP9207097",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "308331400",
            "state": "FL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDICARE GTBA REASSIGN",
            "identifier": "Y061EY",
            "state": "FL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kelly Risheill Gossrau
• Dishti Goyal
• Kristen Grandstaff, DPT
• David Grant, MPT, COMT
• Nikki Mary Grant, M.A.SLP
• Victoria Graves
• Tim Gravier, LPC
• Dylan Green
• Erin L Greenberg, MSW, LCSW
• Stacey Nentwig Greer, M.ED.

• Critical Care Medicine Nurse Practitioner in Creve Coeur, MO
• Providers in Creve Coeur, MO by specialty
• Critical Care Medicine Nurse Practitioner in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 30, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.