William Edward Greer IV, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

085003277 Issued in IL

Practice address

1025 S 6TH St
Springfield, IL 62703-2403

Phone

(217) 528-7541

Fax

(217) 525-7616

NPI assigned

Sep 3, 2008

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

Specialty

Physician Assistant

Education

Southern Illinois University School of Medicine, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Springfield Clinic, LLPGroup PAC ID 0547166076, 678 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorial Medical Center Hospital, Springfield, IL, CCN 140148

Merit-based Incentive Payment System (MIPS)

Final score

88.83 of 100Reported as apm

Quality

75.65

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: williamgreer@sfc.allscriptsdirect.net
• Direct secure messaging: william.greer.1@28977.direct.athenahealth.com

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.

• Springfield Clinic, LLP

  • Multi-Specialty Clinic/Center
  • Springfield, IL
  • NPI 1780638478
  Medicare reassignment Care Compare group NPD
• Siu Physicians & Surgeons, Inc

  • Endocrinology, Diabetes & Metabolism Physician
  • Springfield, IL
  • NPI 1558385989
  Medicare reassignment NPD
• Clinical Radiologists, S.C.

  • Diagnostic Radiology Physician
  • Springfield, IL
  • NPI 1063469252
  Medicare reassignment
• Siu Physicians & Surgeons, Inc

  • Durable Medical Equipment & Medical Supplies
  • Springfield, IL
  • NPI 1164055976
  NPD
• Springfield Clinic LLP

  • Multi-Specialty Clinic/Center
  • Springfield, IL
  • NPI 1215974415
  NPD

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

• Memorial Medical Center

  • General Acute Care Hospital
  • Springfield, IL
  • NPI 1255317590
  Care Compare affiliation

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

{
    "created_epoch": "1220400000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772496000000",
    "number": "1336397355",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1025 S 6TH ST",
            "city": "SPRINGFIELD",
            "state": "IL",
            "postal_code": "627032403",
            "telephone_number": "217-528-7541",
            "fax_number": "217-525-7616"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1025 S 6TH ST",
            "city": "SPRINGFIELD",
            "state": "IL",
            "postal_code": "627032403",
            "telephone_number": "217-528-7541",
            "fax_number": "217-525-7616"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GREER",
        "first_name": "WILLIAM",
        "middle_name": "EDWARD",
        "name_suffix": "IV",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-09-03",
        "last_updated": "2026-03-03",
        "certification_date": "2026-03-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "IL",
            "license": "085003277",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "IL",
            "license": "085003277",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jourdan Greene, APRN, FNP-C
• Morgan Greene, LMSW
• James Joseph Greenwald, DDS
• Andrea J Greenwood, APRN
• Chase Matthew Greer
• Gregory A. Gregg, M.D.
• Nathaniel Gregoire
• Clayton Tyler Gregory
• Stacie Renee Gregory, M.D.
• Abigail L Greider, FNP-C

• Physician Assistant in Springfield, IL
• Providers in Springfield, IL by specialty
• Physician Assistant in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 3, 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.