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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CHRISTY MARKS FNP
NPI 1619429909
Nurse Practitioner in Chicago, IL

Active since November 02, 2016PECOS Enrolled
1650 W HARRISON ST, CHICAGO, IL 60612(312) 942-3326 Get Directions Write a Review

NPPES record last updated: August 17, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 17, 2026, Aug 14, 2024, Jul 30, 2019 and 4 more (7 updates tracked since 2016).

About Christy Marks Fnp NPPES

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

CHRISTY MARKS FNP (NPI 1619429909) is an individual nurse practitioner in Chicago, Illinois, licensed in Tennessee (34634) and active in the NPI registry since November 2016. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1619429909
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameCHRISTY MARKSCredential: FNP
Location Address1650 W HARRISON STChicago, IL 60612-3800
Mailing Address1650 W Harrison StChicago, IL 60612-3800
Phone(312) 942-3326
Sole ProprietorNo
Enumeration DateNovember 2, 2016
Last NPPES UpdateAugust 17, 20267 updates tracked since enumeration
NPPES CertifiedAugust 17, 2026
✔ NPI 1619429909 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
Licenses✔ Licensed in TN · 34634✔ Licensed in IL · 209014969
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 · FamilyTaxonomy 363LF0000X · License 71009098A (IN), 209014969 (IL)
1650 W HARRISON ST, Chicago, IL 60612
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Other Names 1

Professional Name (2)Christy L Marks Fnp

Secondary Practice Locations 2

Location 11 Ingalls DrHarvey, IL 60426-3558 · Phone (708) 915-5290
Location 29200 Calumet Ave Ste N502Munster, IN 46321-2862 · Phone (219) 440-5286

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Christy Marks Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 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 20

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

SHAINA MANN M.D.
Hospitalist
1650 W HARRISON ST, SUITE 466
CHICAGO, IL 60612
Cook County (312) 942-5000
KATE ANN BUCHHEIT MPT
Specialist
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5847
SAMUEL CHARLES FOX MD
Internal Medicine (Pulmonary Disease)
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
AMI ATULKUMAR DAVE MD
Internal Medicine (Hematology & Oncology)
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
MARK FRANCIS MD
Hospitalist
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
ANDREA STERENSTEIN MD
Psychiatry & Neurology (Neurology)
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000
DR. JESSICA ANNE SLOSTAD M.D.
Internal Medicine (Hematology & Oncology)
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-7100
DR. ANGELA LOUISA COLLINS MD
Internal Medicine
1650 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 942-5000

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 Christy Marks's NPI number?

The NPI number for Christy Marks is 1619429909. It was assigned to this individual provider in the NPPES registry on November 2, 2016. The provider is also known as Christy L Marks Fnp.

Where is Christy Marks located?

Christy Marks practices at 1650 W Harrison St, Chicago, IL 60612. The listed phone number is (312) 942-3326.

What is Christy Marks's specialty?

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

Is Christy Marks enrolled in Medicare?

Yes. Christy Marks is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Christy Marks was last updated on August 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 days 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.