Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Giselle Martinez-O'Connor, MSN, APRN, FNP-BC

Individual provider Nurse Practitioner · NPI 1447801998

Giselle Martinez-O'Connor, MSN, APRN, FNP-BC is a Nurse Practitioner in Chicago, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 2019, 7 years ago. Practices with The Board of Trustees of the University of Illinois, a 1,142-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
7
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2019
Specialties on file
2
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

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Practice location Address checks out

1740 W Taylor St
Chicago, IL 60612-7232
Phone: (312) 996-4008
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 5211 W Lawrence, Chicago, IL 60630 — (847) 644-9980
  • 9977 Woods Dr, Skokie, IL 60077 — (224) 364-2273

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 277005408 (IL)
Nurse Practitioner Taxonomy 363L00000X · Licence 277005408 (IL)

Record details

NPI number1447801998
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , APRN , FNP-BC
Sole proprietorYes
NPI enumeratedSeptember 26, 2019
Last updated in NPPESJune 1, 2026
Certification dateJune 1, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice The Board Of Trustees Of The University Of Illinois — 1142 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients42
Services billed 85 a service is one billed item, such as a visit, a test or a procedure
Average patient age59

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at The Board of Trustees of the University of Illinois

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1142 clinicians in the practice; 12 are shown here.

Other providers in Chicago