MISS KATHERINE BALOS MASLAR
NPI 1316510639
Nurse Practitioner - Primary Care in Westmont, IL
About Miss Katherine Balos Maslar NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MISS KATHERINE BALOS MASLAR (NPI 1316510639) is an individual primary care provider in Westmont, Illinois, licensed in Illinois (209021141) and active in the NPI registry since July 2021. She is enrolled in Medicare PECOS, is affiliated with Rush University Medical Center, and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
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
Miss Katherine Balos Maslar 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
2Medicare enrollment records show Katherine Maslar reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oak Brook, IL 60523
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Rush University Medical Group
- 2,169 clinicians in this Medicare group
Chicago, IL 60612
- Reassigned Medicare billing, Illinois enrollment
- 548 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 5
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Rush University Medical Center
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60559 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
WESTMONT, IL 60559
WESTMONT, IL 60559
WESTMONT, IL 60559
WESTMONT, IL 60559
WESTMONT, IL 60559
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 Katherine Maslar's NPI number?
The NPI number for Katherine Maslar is 1316510639. It was assigned to this individual provider in the NPPES registry on July 23, 2021.
Where is Katherine Maslar located?
Katherine Maslar practices at 1010 Executive Dr, Westmont, IL 60559. The listed phone number is (630) 323-0119.
What is Katherine Maslar's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.
Is Katherine Maslar enrolled in Medicare?
Yes. Katherine Maslar 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 Katherine Maslar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Maslar reassigns Medicare benefits to 2 organizations: Rush University Medical Center (Oak Brook, IL) and Rush Medical Group (Chicago, 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 Katherine Maslar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Katherine Maslar accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Katherine Maslar 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.
Is Katherine Maslar affiliated with any hospitals?
According to CMS data, Katherine Maslar is affiliated with Rush University Medical Center.
When was this NPI record last updated?
The NPPES record for Katherine Maslar was last updated on July 23, 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.
# Miss Katherine Balos Maslar · NPI 1316510639
Primary Care physician in Westmont, Illinois. Individual provider, active in the CMS NPPES registry since July 23, 2021.
## Identity
- **NPI:** 1316510639 (Entity type: Individual)
- **Enumerated:** July 23, 2021
- **Primary specialty:** Nurse Practitioner - Primary Care · taxonomy 363LP2300X
- **State license:** 209021141 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1010 EXECUTIVE DR, Westmont, IL 60559-6135
- **Phone:** (630) 323-0119
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Rush University Medical Center (NPI 1801375696, Oak Brook, IL); Rush Medical Group (NPI 1467312850, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** July 23, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1316510639) · Data from the CMS NPPES public registry.