Giselle Martinez-O'Connor, MSN, APRN, FNP-BC

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

277005408 Issued in IL

Practice address

1740 W Taylor St
Chicago, IL 60612-7232

Phone

(312) 996-4008

NPI assigned

Sep 26, 2019

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Electronic endpoints 2

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

Specialty

Nurse Practitioner

Education

Loyola University of Chicago, Stritch School of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

The Board of Trustees of the University of IllinoisGroup PAC ID 3072422716, shared by 24 NPIs, 1,134 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Illinois Hospital and Clinics Hospital, Chicago, IL, CCN 140150

Merit-based Incentive Payment System (MIPS)

Final score

93.28 of 100Reported as group

Quality

73.53

Promoting interoperability

100

Improvement activities

40

Cost

70.73

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science - Nursing

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gmartinezoconnor146795@uihealth.direct-ci.com

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.

• Endeavor Health Medical Group

  • Emergency Medicine Physician
  • Evanston, IL
  • NPI 1497701882
  Medicare reassignment NPD
• The Board of Trustees of the University of Illinois

  • Anatomic Pathology Physician
  • Chicago, IL
  • NPI 1386863819
  Medicare reassignment NPD
• The Board of Trustees of the University of Illinois

  • Federally Qualified Health Center (FQHC)
  • Chicago, IL
  • NPI 1669493466
  Medicare reassignment NPD
• Board of Trustees of the University of Illinois

  • Emergency Medicine Physician
  • Chicago, IL
  • NPI 1891913992
  NPD
• Endeavor Health Medical Group

  • Anesthesiology Physician
  • Evanston, IL
  • NPI 1265695944
  NPD
• The Board of Trustees of the University of Illinois

  • Occupational Medicine Physician
  • Chicago, IL
  • NPI 1043727571
  NPD
• The Board of Trustees of the University of Illinois

  • Federally Qualified Health Center (FQHC)
  • Rockford, IL
  • NPI 1306486022
  NPD
• The Board of Trustees of the University of Illinois

  • Internal Medicine Physician
  • Chicago, IL
  • NPI 1609094739
  NPD

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

• The Board of Trustees of the University of Illinois

  • General Acute Care Hospital
  • Chicago, IL
  • NPI 1861431751
  Care Compare affiliation

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

{
    "created_epoch": "1569456000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780272000000",
    "number": "1447801998",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "17800 KEDZIE AVE",
            "city": "HAZEL CREST",
            "state": "IL",
            "postal_code": "604292029",
            "telephone_number": "708-799-8000",
            "fax_number": "773-967-5808"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1740 W TAYLOR ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606127232",
            "telephone_number": "312-996-4008"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "9977 Woods Dr",
            "address_purpose": "LOCATION",
            "city": "Skokie",
            "state": "IL",
            "postal_code": "60077",
            "country_code": "US",
            "telephone_number": "224-364-2273",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5211 W Lawrence",
            "address_purpose": "LOCATION",
            "city": "Chicago",
            "state": "IL",
            "postal_code": "60630",
            "country_code": "US",
            "telephone_number": "847-644-9980",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MARTINEZ-O'CONNOR",
        "first_name": "GISELLE",
        "credential": "MSN, APRN, FNP-BC",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2019-09-26",
        "last_updated": "2026-06-01",
        "certification_date": "2026-06-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "IL",
            "license": "277005408",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "IL",
            "license": "277005408",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "17800 Kedzie Ave",
            "city": "Hazel Crest",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604292029",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "gmartinezoconnor297941@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "17800 Kedzie Ave",
            "city": "Hazel Crest",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604292029",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Daphne Martinez-Cruz
• Gabriel J Martinez-Diaz, M.D.
• Melinda Marty Martinez-Epperson, M.ED.
• Angela S. Martinez-Fragoso, RBT
• Shayla Brianne Martinez-O'Brien, M.A.
• Francisco Jose Martinez-Rodriguez, MD
• Anna Martinez-Snyder, PHD
• Abigail Arlegui Martinez, PHYSICAL THERAPIST
• Aldo Martinez, OTR/L
• Alejandra Martinez

• Family Nurse Practitioner in Chicago, IL
• Providers in Chicago, IL by specialty
• Family Nurse Practitioner in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 1, 2026; 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.

Verify at the official NPI Registry.