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MRS. MARGARET ROSE O'CALLAGHAN NURSE PRACTITIONER
NPI 1184507014
Nurse Practitioner - Family in Chicago, IL

Active since July 29, 2025PECOS EnrolledAccepts Medicare Assignment
120 W 111TH ST, CHICAGO, IL 60628(773) 768-5000 Get Directions Write a Review

NPPES record last updated: July 29, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mrs. Margaret Rose O'callaghan Nurse Practitioner NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. MARGARET ROSE O'CALLAGHAN NURSE PRACTITIONER (NPI 1184507014) is an individual family provider in Chicago, Illinois, licensed in Illinois (209032753) and active in the NPI registry since July 2025. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1184507014
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMRS. MARGARET ROSE O'CALLAGHANCredential: NURSE PRACTITIONER
Location Address120 W 111TH STChicago, IL 60628-4215
Mailing Address8943 S 84th AveHickory Hills, IL 60457-1305 · (708) 822-5393
Phone(773) 768-5000
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateJuly 29, 2025
NPPES CertifiedJuly 2, 2025
✔ NPI 1184507014 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in IL · 209032753
120 W 111TH ST, Chicago, IL 60628
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Margaret Rose O'callaghan Nurse Practitioner is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2860959764
PECOS Enrollment IDI20260811002639
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Margaret O'callaghan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chicago Family Health Center, Inc.
0.3 mi
Federally Qualified Health Center (FQHC)
120 W. 111TH ST.
Chicago, IL 60628
  • Reassigned Medicare billing, Illinois enrollment
  • 41 clinicians in this Medicare group
NPI 1770785644 (773) 768-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60628 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ERICKA SEARLES MD
Obstetrics & Gynecology
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000
CHICAGO FAMILY HEALTH CENTER - R
Clinic/Center (Federally Qualified Health Center (FQHC))
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000
STEPHANIE M RZEPKA FNP-BC
Nurse Practitioner (Family)
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000
MRS. ADEPEJU OJOMALADE
Nurse Practitioner (Family)
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000
MRS. REGINA HOPKINS
Nurse Practitioner (Family)
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000
DR. NATALIE SANTIAGO BROWN MD
Pediatrics
120 W 111TH ST
CHICAGO, IL 60628
Cook County (773) 768-5000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margaret O'callaghan's NPI number?

The NPI number for Margaret O'callaghan is 1184507014. It was assigned to this individual provider in the NPPES registry on July 29, 2025.

Where is Margaret O'callaghan located?

Margaret O'callaghan practices at 120 W 111th St, Chicago, IL 60628. The listed phone number is (773) 768-5000.

What is Margaret O'callaghan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Margaret O'callaghan enrolled in Medicare?

Yes. Margaret O'callaghan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Margaret O'callaghan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Margaret O'callaghan reassigns Medicare benefits to Chicago Family Health Center, Inc. (Chicago, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margaret O'callaghan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Margaret O'callaghan accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Margaret O'callaghan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Margaret O'callaghan was last updated on July 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.