LORI LYNN MAREK APN-CNP
NPI 1124752092
Nurse Practitioner in Naperville, IL
About Lori Lynn Marek Apn-cnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LORI LYNN MAREK APN-CNP (NPI 1124752092) is an individual nurse practitioner in Naperville, Illinois, licensed in Illinois (209025985) and active in the NPI registry since July 2022. She is enrolled in Medicare PECOS and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses 3
Accepted 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
Lori Lynn Marek Apn-cnp 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.
Medicare Billing Reassignments
3Medicare enrollment records show Lori Marek reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Naperville, IL 60563
- Reassigned Medicare billing, Illinois enrollment
- 561 clinicians in this Medicare group
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 clinicians in this Medicare group
Rockford, IL 61107
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Rockford Psychiatric Medical Services Sc
- 163 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60563 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Other Providers at the Same Location NPPES 17
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NAPERVILLE, IL 60563
NAPERVILLE, IL 60563
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 Lori Marek's NPI number?
The NPI number for Lori Marek is 1124752092. It was assigned to this individual provider in the NPPES registry on July 14, 2022.
Where is Lori Marek located?
Lori Marek practices at 1335 N Mill St, Naperville, IL 60563. The listed phone number is (630) 646-8000.
What is Lori Marek's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Lori Marek enrolled in Medicare?
Yes. Lori Marek 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 organizations bill Medicare for Lori Marek's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lori Marek reassigns Medicare benefits to 3 organizations: Edward Health Ventures (Naperville, IL), Endeavor Health Medical Group (Evanston, IL) and Rockford Psychiatric Medical Services, S.C. (Rockford, IL). Each 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 Lori Marek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lori Marek accept?
Health plans from MercyCare, MercyCare Health Plans, Oscar Health, Quartz and UnitedHealthcare list Lori Marek 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 Lori Marek was last updated on April 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Lori Lynn Marek, APN-CNP · NPI 1124752092
Nurse Practitioner physician in Naperville, Illinois. Individual provider, active in the CMS NPPES registry since July 14, 2022.
## Identity
- **NPI:** 1124752092 (Entity type: Individual)
- **Enumerated:** July 14, 2022
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 209025985 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1335 N MILL ST, Naperville, IL 60563-2261
- **Phone:** (630) 646-8000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Edward Health Ventures (NPI 1245281724, Naperville, IL); Endeavor Health Medical Group (NPI 1497701882, Evanston, IL); Rockford Psychiatric Medical Services, S.C. (NPI 1821391442, Rockford, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** April 10, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1124752092) · Data from the CMS NPPES public registry.