Mary Alissa Willis, M.D.

Primary specialty

Neurology PhysicianTaxonomy code 2084N0400X

License

35.121567 Issued in OH

Practice address

9500 Euclid Ave
Cleveland, OH 44195-0001

Phone

(216) 444-8600

Fax

(216) 445-7013

NPI assigned

May 31, 2007

Last updated

Jun 11, 2025By 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 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in MS, OH2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Neurology

Education

University of Mississippi School of Medicine, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cleveland ClinicGroup PAC ID 1850203555, 6,954 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Hillcrest Hospital Hospital, Mayfield Heights, OH, CCN 360230
• Fairview Hospital Hospital, Cleveland, OH, CCN 360077
• Cleveland Clinic Hospital, Cleveland, OH, CCN 360180

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• The Cleveland Clinic Foundation

  • General Acute Care Hospital
  • Cleveland, OH
  • NPI 1679525919
  Medicare reassignment Care Compare group
• State of Mississippi - University of Mississippi Medical Center

  • General Acute Care Hospital
  • Jackson, MS
  • NPI 1154317527
  Medicare reassignment NPD
• State of Mississippi - University of Mississippi Medical Center

  • Prosthetic/Orthotic Supplier
  • Jackson, MS
  • NPI 1235019530
  NPD
• Lima Memorial Joint Operating Company

  dba Lima Memorial Health System

  • General Acute Care Hospital
  • Lima, OH
  • NPI 1336144732
  NPD (past)
• Ruth K. Fredericks, M.D.

  • Neurology Physician
  • Jackson, MS
  • NPI 1427007400
  NPD (past)

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

• Cleveland Clinic Health System - East Region

  dba Hillcrest Hospital

  • General Acute Care Hospital
  • Mayfield HTS, OH
  • NPI 1902858152
  Care Compare affiliation
• Fairview Hospital

  • General Acute Care Hospital
  • Cleveland, OH
  • NPI 1215989611
  Care Compare affiliation
• The Cleveland Clinic Foundation

  • General Acute Care Hospital
  • Cleveland, OH
  • NPI 1679525919
  Care Compare affiliation

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

{
    "created_epoch": "1180569600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749600000000",
    "number": "1710188248",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9500 EUCLID AVE",
            "city": "CLEVELAND",
            "state": "OH",
            "postal_code": "441950001",
            "telephone_number": "216-645-0825"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9500 EUCLID AVE",
            "city": "CLEVELAND",
            "state": "OH",
            "postal_code": "441950001",
            "telephone_number": "216-444-8600",
            "fax_number": "216-445-7013"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIS",
        "first_name": "MARY",
        "middle_name": "ALISSA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-05-31",
        "last_updated": "2025-06-11",
        "certification_date": "2025-06-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "MS",
            "license": "20793",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "OH",
            "license": "35.121567",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "141729",
            "state": "AL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Joseph E Willis, MD
• La Shanda D Willis, MA
• Linda F Willis
• Lisa Annette Willis
• Lois Willis
• Mercedes Cheyenne Dawn Willis
• Penny Shevawn Willis, LSW
• Riccardo Willis
• Lisa Anne Willman, LPCC-S
• Deborah J Willner, P.A.

• Neurology Physician in Cleveland, OH
• Providers in Cleveland, OH by specialty
• Neurology Physician in Ohio

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 11, 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.