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MARYEILEEN ZAJAC
NPI 1114511367
Nurse Practitioner in Chicago, IL

Active since February 26, 2021PECOS EnrolledAccepts Medicare Assignment
94.1/100
CMS Quality Rating
675 N SAINT CLAIR ST STE 19-100, CHICAGO, IL 60611(312) 664-3278(312) 695-5774 Get Directions Write a Review

NPPES record last updated: June 30, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 30, 2021, Feb 26, 2021 (2 updates tracked since 2021).

About Maryeileen Zajac NPPES

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

MARYEILEEN ZAJAC (NPI 1114511367) is an individual nurse practitioner in Chicago, Illinois, licensed in Illinois (209022729) and active in the NPI registry since February 2021. She is enrolled in Medicare PECOS, is affiliated with Northwestern Memorial Hospital, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1114511367
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMARYEILEEN ZAJAC
Location Address675 N SAINT CLAIR ST STE 19-100Chicago, IL 60611-5969
Mailing Address675 N Saint Clair St Ste 19-100Chicago, IL 60611-5969 · (312) 664-3278 · Fax (312) 695-5774
Phone(312) 664-3278
Fax(312) 695-5774
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateFebruary 26, 2021
Last NPPES UpdateJune 30, 20212 updates tracked since enumeration
NPPES CertifiedJune 30, 2021
✔ NPI 1114511367 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in IL · 209022729
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License 209022729 (IL)
675 N SAINT CLAIR ST STE 19-100, Chicago, IL 60611
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Maryeileen Zajac 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 ID7416365911
PECOS Enrollment IDI20210422000632
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northwestern Memorial Hospital

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140281
Location251 E Huron StChicago, IL 60611 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60611 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.1/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality82.59
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

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

LAURA JEAN DAVIDSON M.D.
Internal Medicine (Interventional Cardiology)
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278
ALISON C BATES PA-C
Physician Assistant
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278
MICHAEL JAMES GABER AGACNP-BC
Nurse Practitioner
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278
REBEKKAH SOBOLEWSKI
Nurse Practitioner
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 695-4965
DR. PRIYA FREANEY M.D.
Internal Medicine (Cardiovascular Disease)
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 695-4965
KERRY SHANKLIN FNP
Nurse Practitioner (Family)
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278
ANTHONY JACOB SPYCHALSKI APRN, AGACNP-BC
Nurse Practitioner
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278
EMILY KATHERINE BRAKMAN APRN, CNP
Nurse Practitioner
675 N SAINT CLAIR ST STE 19-100
CHICAGO, IL 60611
Cook County (312) 664-3278

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 Maryeileen Zajac's NPI number?

The NPI number for Maryeileen Zajac is 1114511367. It was assigned to this individual provider in the NPPES registry on February 26, 2021.

Where is Maryeileen Zajac located?

Maryeileen Zajac practices at 675 N Saint Clair St Ste 19-100, Chicago, IL 60611. The listed phone number is (312) 664-3278.

What is Maryeileen Zajac's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Maryeileen Zajac enrolled in Medicare?

Yes. Maryeileen Zajac 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.

Is Maryeileen Zajac affiliated with any hospitals?

According to CMS data, Maryeileen Zajac is affiliated with Northwestern Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Maryeileen Zajac was last updated on June 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.