Individual provider Active NPI

Andrew Riggan Williams, M.D.

  • Emergency Medicine Physician
  • Oak Park, IL
National Provider Identifier
1275988156
Registry record updated Mar 19, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Emergency Medicine PhysicianTaxonomy code 207P00000X
License
036158129 Issued in IL
Practice address
3 Erie CT
Oak Park, IL 60302-2519
Phone
(708) 763-6747
NPI assigned
Apr 28, 2016
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 19, 2024

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X 036158129 IL Primary

Addresses

Primary practice location

3 Erie CT
Oak Park, IL 60302-2519

Mailing address

3 Erie CT
Oak Park, IL 60302-2519
Phone (708) 763-6747

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL, WI2 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

Enrollment IDStateProvider typePAC IDDetails
I20220224001133 IL Practitioner - Emergency Medicine 1759619448 Reassigns benefits to 9 organizations
I20251023003917 WI Practitioner - Emergency Medicine 1759619448 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
University of Michigan Medical School, 2016
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mercy Health System CorporationGroup PAC ID 7416860440, 749 clinicians
Humboldt Park Health Emergency Medicine LLCGroup PAC ID 7618365800, 9 clinicians
Illinois Emergency Medicine Specialists LLCGroup PAC ID 6103071808, 43 clinicians
Rockford Health PhysiciansGroup PAC ID 2567374036, 520 clinicians

Practice addresses (Care Compare)

1000 Mineral Point Ave
Janesville, WI 53548-2940
Phone (608) 756-6000

1044 N Francisco Ave
Chicago, IL 60622-2743
Phone (773) 292-8200

4646 N Marine Dr
Chicago, IL 60640-5759
Phone (773) 878-8700

8201 E Riverside Blvd
Rockford, IL 61114-2300
Phone (815) 971-2000

875 S Route 31
Crystal Lake, IL 60014-8190
Phone (779) 220-5500

Hospital & facility affiliations

  • Humboldt Park Health Hospital, Chicago, IL, CCN 140206
  • Javon Bea Hospital Hospital, Rockford, IL, CCN 140239
  • Mercy Health System Corp Hospital, Janesville, WI, CCN 520066
  • West Suburban Medical Center Hospital, Oak Park, IL, CCN 140049

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
036158129ILMDEmergency Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Rockford Health Physicians CurrentSince Oct 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Oct 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Oct 1, 2025 Accepting new patients
Mercy Harvard Hospital Inc CurrentSince Dec 1, 2025 Accepting new patients
Aurora Emergency Physicians, LLC Emergency Medicine CurrentSince Jan 26, 2020 Accepting new patients
Illinois Emergency Medicine Specialists, LLC CurrentSince Aug 1, 2022 Accepting new patients
Mercy Harvard Hospital Inc CurrentSince Dec 1, 2025 Accepting new patients
Insight Chicago, Inc. CurrentSince Nov 1, 2024 Accepting new patients
Insight Chicago, Inc. CurrentSince Nov 1, 2024 Accepting new patients
Humboldt Park Health Emergency Medicine, LLC Emergency Medicine CurrentSince Sep 6, 2025 Accepting new patients
Cepamerica Illinois LLP Emergency Medicine CurrentSince Apr 1, 2022 Accepting new patients
Iems Physician Services PLLC Emergency Medicine CurrentSince May 1, 2025 Accepting new patients
Aurora Emergency Physicians, LLC Emergency Medicine CurrentSince Sep 1, 2024 Accepting new patients
Cepamerica Illinois LLP Emergency Medicine CurrentSince Apr 1, 2022 Accepting new patients
Cepamerica Illinois LLP Emergency Medicine Current Accepting new patients

Locations

1601 Cummins Dr
Ste D
Modesto, CA 95358
Phone (510) 851-7423

2000 Ogden Ave
Aurora, IL 60504
Phone (630) 466-8200

3249 Oak Park Ave
Berwyn, IL 60402
Phone (708) 783-2696

500 Remington Blvd
Bolingbrook, IL 60440
Phone (630) 312-5000

29624 Network Pl
Chicago, IL 60673
Phone (608) 741-7652

1044 N Francisco Ave
Chicago, IL 60622
Phone (773) 292-8227

4646 N Marine Dr
Chicago, IL 60640
Phone (773) 564-5102

2701 W 68th St
Chicago, IL 60629
Phone (773) 471-8000

2525 S Michigan Ave
Chicago, IL 60616
Phone (312) 355-1153

875 S State Route 31
Crystal Lake, IL 60014
Phone (779) 220-5500

348 S Division St
Harvard, IL 60033
Phone (815) 943-1122

901 Grant St
Harvard, IL 60033
Phone (815) 943-5431

3 Erie Ct
Oak Park, IL 60302
Phone (708) 763-6200

2300 N Rockton Ave
Rockford, IL 61103
Phone (815) 971-5510

8201 E Riverside Blvd
Rockford, IL 61114
Phone (815) 971-4066

1400 W Park St
Urbana, IL 61801
Phone (217) 337-2000

1122 W Veterans Pkwy
Yorkville, IL 60560
Phone (630) 466-8200

1000 Mineral Point Ave
Janesville, WI 53548
Phone (608) 261-6868

3400 Deerfield Dr
Janesville, WI 53546
Phone (608) 314-3600

Interoperability endpoints

  • FHIR API: https://api.platform.athenahealth.com/14272/brand/70/csg/1/fhir/r4

Organizations & group practices 15

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.

View all 15

Hospital & facility affiliations 4

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

NPI Registry JSON

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

{
    "created_epoch": "1461801600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1710806400000",
    "number": "1275988156",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3 ERIE CT",
            "city": "OAK PARK",
            "state": "IL",
            "postal_code": "603022519",
            "telephone_number": "708-763-6747"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3 ERIE CT",
            "city": "OAK PARK",
            "state": "IL",
            "postal_code": "603022519",
            "telephone_number": "708-763-6747"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "ANDREW",
        "middle_name": "RIGGAN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-04-28",
        "last_updated": "2024-03-19",
        "certification_date": "2024-03-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": "036158129",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Oak Park, IL

Sources for this page

Verify at the official NPI Registry.