Individual provider Active NPI

Crystal Ellaine Rayon, M.D.

  • Family Medicine Physician
  • Milwaukee, WI
National Provider Identifier
1265968655
Registry record updated Aug 18, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Medicine PhysicianTaxonomy code 207Q00000X
License
74035 Issued in WI
Practice address
1575 N Rivercenter Dr
Milwaukee, WI 53212-3978
Phone
(414) 283-8444
NPI assigned
May 4, 2017
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 18, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Family Medicine Physician 207Q00000X 036.174736 IL
Family Medicine Physician 207Q00000X 74035 WI Primary

Addresses

Primary practice location

1575 N Rivercenter Dr
Milwaukee, WI 53212-3978

Mailing address

PO Box 735044
Chicago, IL 60673-5044
Phone (414) 283-8444

Other practice location 1

8201 E Riverside Blvd
Rockford, IL 61114-2300
Phone (815) 971-7000

Other practice location 2

836 W Wellington Ave
Chicago, IL 60657-5147
Phone (773) 975-1600

Other identifiers 1

IdentifierTypeStateIssuer
1001404945MedicaidWI

Electronic endpoints 2

TypeEndpointUseAffiliation
FHIR URL https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/
Direct Messaging Address crayon281715@direct.myadvocateaurora.org

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI, IL2 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
I20201002001011 WI Practitioner - Family Practice 8820369184
I20250904001025 IL Practitioner - Family Practice 8820369184 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Family Practice
Education
Other, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Rockford Health PhysiciansGroup PAC ID 2567374036, 520 clinicians

Practice addresses (Care Compare)

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

Hospital & facility affiliations

  • Javon Bea Hospital Hospital, Rockford, IL, CCN 140239

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Rockford Health Physicians CurrentSince Aug 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Aug 1, 2025 Accepting new patients
Mercy Health System Corporation CurrentSince Aug 1, 2025 Accepting new patients

Locations

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

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

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

6998 Redansa Dr
Rockford, IL 61108
Phone (815) 971-3110

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

Interoperability endpoints

  • Direct secure messaging: crayon126862@direct.mhemail.org
  • Direct secure messaging: crayon281715@direct.myadvocateaurora.org

Organizations & group practices 3

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.

Hospital & facility affiliations 1

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": "1493856000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755475200000",
    "number": "1265968655",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 735044",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606735044",
            "telephone_number": "414-283-8444"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1575 N RIVERCENTER DR",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532123978",
            "telephone_number": "414-283-8444"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "8201 E Riverside Blvd",
            "address_purpose": "LOCATION",
            "city": "Rockford",
            "state": "IL",
            "postal_code": "611142300",
            "country_code": "US",
            "telephone_number": "815-971-7000",
            "fax_number": "815-968-4795",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "836 W Wellington Ave",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "606575147",
            "country_code": "US",
            "telephone_number": "773-975-1600",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "RAYON",
        "first_name": "CRYSTAL",
        "middle_name": "ELLAINE",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-05-04",
        "last_updated": "2025-08-18",
        "certification_date": "2025-08-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "IL",
            "license": "036.174736",
            "primary": false
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WI",
            "license": "74035",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1001404945",
            "state": "WI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "1575 N Rivercenter Dr",
            "city": "Milwaukee",
            "state": "WI",
            "country_code": "US",
            "postal_code": "532123978",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "crayon281715@direct.myadvocateaurora.org",
            "affiliation": "N",
            "address_1": "1575 N Rivercenter Dr",
            "city": "Milwaukee",
            "state": "WI",
            "country_code": "US",
            "postal_code": "532123978",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Milwaukee, WI

Sources for this page

Verify at the official NPI Registry.