Active NPI
Crystal Ellaine Rayon, M.D.
- Family Medicine Physician
- Milwaukee, WI
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Family Medicine Physician
- License
- 74035
- 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
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1001404945 | Medicaid | WI |
Electronic endpoints 2
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| 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, IL
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
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
Practice addresses (Care Compare)
8201 E Riverside Blvd
Rockford, IL 61114-2300
Phone (815) 971-2000
Hospital & facility affiliations
- Javon Bea Hospital
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Rockford Health Physicians | Current | Accepting new patients | |
| Mercy Health System Corporation | Current | Accepting new patients | |
| Mercy Health System Corporation | Current | 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
- crayon126862@direct.mhemail.org
- 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.
-
- Multi-Specialty Clinic/Center
- Rockford, IL
- NPI 1043242886
-
- Critical Access Hospital
- Lake Geneva, WI
- NPI 1699728550
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Rockford, IL
- NPI 1629118609
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 18, 2025; 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.