NPIMap

Individual provider Active NPI

Diane Sierens, M.D.

  • Neurological Surgery Physician
  • Rockford, IL
National Provider Identifier
1831127802
Registry record updated Mar 6, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neurological Surgery PhysicianTaxonomy code 207T00000X
License
036102651 Issued in IL
Practice address
2350 N Rockton Ave
Rockford, IL 61103-3600
Phone
(815) 971-7600
NPI assigned
Jun 29, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 6, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Neurological Surgery Physician 207T00000X 036102651 IL Primary

Addresses

Primary practice location

2350 N Rockton Ave
Rockford, IL 61103-3600

Mailing address

2350 N Rockton Ave
Rockford, IL 61103-3600
Phone (815) 971-7600

Other practice location 1

305 W Jackson St Ste 100
Carbondale, IL 62901-1474
Phone (618) 351-4972

Other identifiers 1

IdentifierTypeStateIssuer
036102651OtherILSTATE LICENSE

Electronic endpoints 2

TypeEndpointUseAffiliation
Direct Messaging Address dsierens89725@sih.direct-ci.com
Direct Messaging Address dsierens@direct.ccprovider.org Direct Cook County

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in IL
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20040924001021 IL Practitioner - Neurosurgery 2062481294 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Neurosurgery
Education
Rush Medical College of Rush University, 1994
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Cook CountyGroup PAC ID 2860398088, 770 clinicians

Practice addresses (Care Compare)

1901 W Harrison St
Chicago, IL 60612-3714
Phone (312) 633-7292

305 W Jackson St
Suite 100
Carbondale, IL 62901-1474
Phone (618) 351-4972

500 E 51St St
Chicago, IL 60615-2494
Phone (312) 572-2000

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
95.11 of 100Reported as group
Quality
74.7
Promoting interoperability
100
Improvement activities
40
Cost
85.45

Procedures performed for Medicare patients

ProcedureNumber of procedures
Spinal fusion1-10

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Southern Illinois Medical Services, NFP CurrentSince Feb 6, 2026 Accepting new patients
Cook County CurrentSince Sep 19, 2015 Accepting new patients
Cook County Current Accepting new patients
Rockford Health Physicians Current Accepting new patients
Cook County CurrentSince Sep 19, 2015 Accepting new patients
RMH Pathologists, LTD Current Accepting new patients
John H Stroger Jr Hospital Cook County Past Accepting new patients

Locations

2601 W Main St
Carbondale, IL 62901
Phone (618) 351-7300

305 W Jackson St
Ste 100
Carbondale, IL 62901
Phone (618) 351-4972

500 E 51st St
Chicago, IL 60615
Phone (312) 572-2000

1901 W Harrison St
Chicago, IL 60612
Phone (312) 864-5100

1969 W Ogden Ave
Chicago, IL 60612
Phone (312) 864-3600

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

2350 N Rockton Ave
Rockford, IL 61103
Phone (815) 971-2200

2400 N Rockton Ave
Rockford, IL 61103
Phone (815) 971-6310

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

1969 W Hart Rd
Beloit, WI 53511
Phone (608) 364-5011

Interoperability endpoints

  • Direct secure messaging: dsierens@direct.ccprovider.org

Organizations & group practices 7

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 29

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

View all 29

NPI Registry JSON

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

{
    "created_epoch": "1151539200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772755200000",
    "number": "1831127802",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2350 N ROCKTON AVE",
            "city": "ROCKFORD",
            "state": "IL",
            "postal_code": "611033600",
            "telephone_number": "815-971-7600"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2350 N ROCKTON AVE",
            "city": "ROCKFORD",
            "state": "IL",
            "postal_code": "611033600",
            "telephone_number": "815-971-7600"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "305 W Jackson St Ste 100",
            "address_purpose": "LOCATION",
            "city": "Carbondale",
            "state": "IL",
            "postal_code": "629011474",
            "country_code": "US",
            "telephone_number": "618-351-4972",
            "fax_number": "618-351-4973",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIERENS",
        "first_name": "DIANE",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-06-29",
        "last_updated": "2026-03-06",
        "certification_date": "2026-03-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "IL",
            "license": "036102651",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "STATE LICENSE",
            "identifier": "036102651",
            "state": "IL"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "dsierens89725@sih.direct-ci.com",
            "affiliation": "N",
            "address_1": "305 W Jackson St Ste 100",
            "city": "Carbondale",
            "state": "IL",
            "country_code": "US",
            "postal_code": "629011474",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "dsierens@direct.ccprovider.org",
            "affiliation": "Y",
            "affiliationName": "Cook County",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1969 W. Ogden Ave.",
            "city": "Chicago",
            "state": "IL",
            "country_code": "US",
            "postal_code": "606123723",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Rockford, IL

Sources for this page

Verify at the official NPI Registry.