Katherine Grierson

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

5601003655 Issued in MI

Practice address

3601 W 13 Mile Rd
Royal Oak, MI 48073-6712

Phone

(248) 898-5000

NPI assigned

Mar 3, 2006

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 MI

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, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Memorial Medical Center of West MichiganGroup PAC ID 3678543659, 62 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Corewell Health Ludington Hospital Hospital, Ludington, MI, CCN 230110

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

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 and National Provider Directory roles.

• Memorial Medical Center of West Michigan

  dba Corewell Health Ludington Hospital

  • General Acute Care Hospital
  • Ludington, MI
  • NPI 1972589489
  Medicare reassignment Care Compare group NPD
• Memorial Medical Center of West Michigan

  dba Corewell Health Ludington Hospital Professional

  • Family Medicine Physician
  • Ludington, MI
  • NPI 1144639360
  NPD
• Spectrum Health Primary Care Partners

  dba Corewell Health Medical Group West

  • Internal Medicine Physician
  • Grand Rapids, MI
  • NPI 1235188673
  NPD (past)

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

• Memorial Medical Center of West Michigan

  dba Corewell Health Ludington Hospital

  • General Acute Care Hospital
  • Ludington, MI
  • NPI 1972589489
  Care Compare affiliation

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

{
    "created_epoch": "1141344000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1295702777",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3601 W 13 MILE RD",
            "address_2": "400-FSC/PCS",
            "city": "ROYAL OAK",
            "state": "MI",
            "postal_code": "480736712"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3601 W 13 MILE RD",
            "city": "ROYAL OAK",
            "state": "MI",
            "postal_code": "480736712",
            "telephone_number": "248-898-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRIERSON",
        "first_name": "KATHERINE",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-03-03",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MI",
            "license": "5601003655",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Cristina Greulich, MD
• Akashdeep Singh Grewal, MD
• Prabhjot Kaur Grewal, MD
• Sarina Grewe, LMSW
• John Grgicak, D.C.
• Amanda Griffith, ACNP-BC
• Pamela Lynn Griffor
• Inga Grills
• Grit and Grace Counseling PLLC
• Austen Nicklaus Grooms, DO

• Physician Assistant in Royal Oak, MI
• Providers in Royal Oak, MI by specialty
• Physician Assistant in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.