William B Weems, MD

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

036101350 Issued in IL

Practice address

5875 E Riverside Blvd
Rockford, IL 61114-4937

Phone

(815) 398-9491

Fax

(815) 381-7498

NPI assigned

Jun 7, 2006

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

Electronic endpoints 2

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Anesthesiology

Education

University of Chicago, Pritzker School of Medicine, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Advocate Health and Hospitals CorporationGroup PAC ID 7810800935, 3,081 clinicians

North American Partners in Anesthesia Illinois LLCGroup PAC ID 1052576519, 431 clinicians

Orthomidwest, PLLCGroup PAC ID 0749183713, 531 clinicians

Rockford Health PhysiciansGroup PAC ID 2567374036, 520 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Advocate Sherman Hospital Hospital, Elgin, IL, CCN 140030
• Saint Joseph Medical Center Hospital, Joliet, IL, CCN 140007
• Javon Bea Hospital Hospital, Rockford, IL, CCN 140239

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 32)

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.

• Advocate Health and Hospitals Corporation

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment Care Compare group NPD
• Huntley Anesthesia Associates LLC

  • Anesthesiology Physician
  • Huntley, IL
  • NPI 1205282019
  Medicare reassignment NPD Authorized official
• Orthomidwest, PLLC

  • Orthopaedic Surgery Physician
  • Rockford, IL
  • NPI 1730136474
  Medicare reassignment Care Compare group NPD
• Rockford Health Physicians

  • Multi-Specialty Clinic/Center
  • Rockford, IL
  • NPI 1043242886
  Medicare reassignment Care Compare group NPD
• Town Square Anesthesia LLC

  • Anesthesiology Physician
  • Woodstock, IL
  • NPI 1669471017
  Medicare reassignment NPD Authorized official
• North American Partners in Anesthesia (Illinois), LLC

  • Anesthesiology Physician
  • Oak Park, IL
  • NPI 1699032524
  Medicare reassignment Care Compare group
• Central Dupage Physician Group

  • Family Medicine Physician
  • Carol Stream, IL
  • NPI 1033149844
  Medicare reassignment NPD
• Northwestern Medical Faculty Foundation

  • Multi-Specialty Clinic/Center
  • Carol Stream, IL
  • NPI 1346235314
  Medicare reassignment NPD
• Oak Brook Anesthesiologists, LTD.

  • Anesthesiology Physician
  • Oak Brook, IL
  • NPI 1881705937
  Medicare reassignment NPD
• Heartland Anesthesia LLC

  • Anesthesiology Physician
  • Bloomington, IL
  • NPI 1881178259
  NPD Authorized official
• Advocate Health & Hospitals Corporation

  • Medical Specialty Clinic/Center
  • Oak Lawn, IL
  • NPI 1912936014
  NPD
• Advocate Health and Hospitals Corporation

  • Children's Hospital
  • Oak Lawn, IL
  • NPI 1508315516
  NPD

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

• Advocate Sherman Hospital

  • General Acute Care Hospital
  • Elgin, IL
  • NPI 1629026364
  Care Compare affiliation
• Javon Bea Hospital

  • General Acute Care Hospital
  • Rockford, IL
  • NPI 1629118609
  Care Compare affiliation
• Saint Joseph Medical Center - Joliet LLC

  • General Acute Care Hospital
  • Joliet, IL
  • NPI 1760220198
  Care Compare affiliation
• Sherman Hospital

  • Skilled Nursing Facility
  • Elgin, IL
  • NPI 1275584302

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1149638400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782432000000",
    "number": "1003856295",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 735263",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606735263",
            "telephone_number": "815-398-9491",
            "fax_number": "815-381-7498"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5875 E RIVERSIDE BLVD",
            "city": "ROCKFORD",
            "state": "IL",
            "postal_code": "611144937",
            "telephone_number": "815-398-9491",
            "fax_number": "815-381-7498"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "10400 Haligus Rd",
            "address_purpose": "LOCATION",
            "city": "Huntley",
            "state": "IL",
            "postal_code": "601429553",
            "country_code": "US",
            "telephone_number": "224-654-0000",
            "fax_number": "224-654-0000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1425 N Randall Rd",
            "address_purpose": "LOCATION",
            "city": "Elgin",
            "state": "IL",
            "postal_code": "601232300",
            "country_code": "US",
            "telephone_number": "847-742-9800",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "Centegra Memorial Medical Center",
            "address_2": "3701 Doty Road",
            "address_purpose": "LOCATION",
            "city": "Woodstock",
            "state": "IL",
            "postal_code": "60098",
            "country_code": "US",
            "telephone_number": "815-334-3170",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WEEMS",
        "first_name": "WILLIAM",
        "middle_name": "B",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-07",
        "last_updated": "2026-06-26",
        "certification_date": "2026-06-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "IL",
            "license": "036101350",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "1425 N Randall Rd",
            "city": "Elgin",
            "state": "IL",
            "country_code": "US",
            "postal_code": "601232300",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wweems403313@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1425 N Randall Rd",
            "city": "Elgin",
            "state": "IL",
            "country_code": "US",
            "postal_code": "601232300",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Tracy R Weber, RN, CDCES
• Jill Weberg, APRN
• William Cottie Weddle Jr.
• Amy Wedel, OTR/L
• Michael Murphy Weedman, PA-C
• Jaclyn C. Weidner, APN
• Tara Weidner, RN
• Jami A Weiland, PHARMD
• Jessica Weiland, NP
• Ryan Scott Weintraub

• Anesthesiology Physician in Rockford, IL
• Providers in Rockford, IL by specialty
• Anesthesiology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 26, 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.