William D Gaumer

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

085006292 Issued in IL

Practice address

2650 Ridge Ave
Evanston, IL 60201-1718

Phone

(847) 570-2000

NPI assigned

Aug 18, 2017

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in IL

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

Merit-based Incentive Payment System (MIPS)

Final score

84.9 of 100Reported as group

Quality

75.91

Promoting interoperability

99

Improvement activities

40

Cost

74.6

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 and National Provider Directory roles.

• Endeavor Health Medical Group

  • Emergency Medicine Physician
  • Evanston, IL
  • NPI 1497701882

  IL

  Medicare reassignment
• Endeavor Health Medical Group

  • Anesthesiology Physician
  • Evanston, IL
  • NPI 1265695944
  NPD

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

{
    "created_epoch": "1503014400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774828800000",
    "number": "1851817100",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1115 HOLLY LN",
            "city": "GLENVIEW",
            "state": "IL",
            "postal_code": "600252635",
            "telephone_number": "847-489-2983"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2650 RIDGE AVE",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602011718",
            "telephone_number": "847-570-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GAUMER",
        "first_name": "WILLIAM",
        "middle_name": "D",
        "name_prefix": "Mr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-08-18",
        "last_updated": "2026-03-30",
        "certification_date": "2026-03-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "IL",
            "license": "085006292",
            "primary": true
        },
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "IL",
            "license": "085.006292",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Oscar Javier Garza Ovalle, M.D.
• Ashlin Joseph Gasiorowski, D.C.
• Leonora M. Gatewood, MD
• Cornelia Gaty, LCSW
• Rebecca Gatzke, PHARMD
• Natalie Gavin
• Patrick J Gavin, M.D.
• Grzegorz Gawor, M.D.
• Matthew John Gayed, MD
• Janet Prior Gayes

• All providers in Evanston, IL
• Physician Assistant in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 30, 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.