Individual provider Active NPI

Regina Williams, PA-C

  • Physician Assistant
  • Mount Prospect, IL
National Provider Identifier
1346228822
Registry record updated Apr 2, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
085000591 Issued in IL
Practice address
199 W Rand Rd
Mount Prospect, IL 60056-1151
Phone
(847) 618-5400
Fax
(847) 618-3709
NPI assigned
Jan 5, 2006
Last updated
Apr 2, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 2, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 1026417 IL
Physician Assistant 363A00000X 085000591 IL Primary

Addresses

Primary practice location

199 W Rand Rd
Mount Prospect, IL 60056-1151

Mailing address

2650 Ridge Ave Ste 1223
Evanston, IL 60201-1700
Phone (847) 570-2040

Other identifiers 1

IdentifierTypeStateIssuer
085000591OtherILSTATE LICENSE

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address rwilliams22564@direct.nch.org

Medicare participation

Medicare enrollment files
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

Enrollment IDStateProvider typePAC IDDetails
I20051220000876 IL Practitioner - Physician Assistant 5193747046 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 1993
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Endeavor Health Medical GroupGroup PAC ID 2163334699, 3,330 clinicians

Practice addresses (Care Compare)

1450 Busch Pkwy
Buffalo Grove, IL 60089-4541
Phone (847) 725-8640

199 W Rand Rd
Mount Prospect, IL 60056-1151
Phone (847) 618-5400

21481 N Rand Rd
Kildeer, IL 60047-3061
Phone (847) 618-9696

2650 Ridge Ave
Evanston, IL 60201-1700

455 S Roselle Rd
Schaumburg, IL 60193-2971
Phone (847) 985-0600

Hospital & facility affiliations

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

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
1026417ILMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Endeavor Health Medical Group CurrentSince Nov 30, 2023 Accepting new patients
Northwest Community Health Services Inc Physician Assistant CurrentSince Sep 1, 2010 Accepting new patients

Locations

1538 N Arlington Heights Rd
Arlington Heights, IL 60004
Phone (847) 253-6464

1051 W Rand Rd
Arlington Hts, IL 60004
Phone (847) 221-4601

1450 Busch Pkwy
Buffalo Grove, IL 60089
Phone (847) 459-7860

9532 Eagle Way
Chicago, IL 60678

2650 Ridge Ave
Evanston, IL 60201
Phone (847) 570-1206

2650 Ridge Ave
Ste 1223
Evanston, IL 60201
Phone (847) 982-3175

2650 Ridge Ave
Ste 2218A
Evanston, IL 60201
Phone (847) 503-4222

21481 N Rand Rd
Kildeer, IL 60047
Phone (847) 618-9696

1201 S Rand Rd
Lake Zurich, IL 60047
Phone (847) 540-8088

199 W Rand Rd
Mt Prospect, IL 60056
Phone (847) 618-5400

519 S Roselle Rd
Schaumburg, IL 60193
Phone (847) 618-0535

Organizations & group practices 4

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.

Hospital & facility affiliations 2

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": "1136419200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775088000000",
    "number": "1346228822",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2650 RIDGE AVE STE 1223",
            "city": "EVANSTON",
            "state": "IL",
            "postal_code": "602011700",
            "telephone_number": "847-570-2040",
            "fax_number": "847-733-5315"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "199 W RAND RD",
            "city": "MOUNT PROSPECT",
            "state": "IL",
            "postal_code": "600561151",
            "telephone_number": "847-618-5400",
            "fax_number": "847-618-3709"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "REGINA",
        "name_prefix": "Miss",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-01-05",
        "last_updated": "2026-04-02",
        "certification_date": "2026-04-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "IL",
            "license": "1026417",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "IL",
            "license": "085000591",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "STATE LICENSE",
            "identifier": "085000591",
            "state": "IL"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "rwilliams22564@direct.nch.org",
            "affiliation": "N",
            "address_1": "199 W Rand Rd",
            "city": "Mount Prospect",
            "state": "IL",
            "country_code": "US",
            "postal_code": "600561151",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Mount Prospect, IL

Sources for this page

Verify at the official NPI Registry.