MARY SIMMONS MD
NPI 1457373946
Family Medicine in Belvidere, IL
About Mary Simmons Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY SIMMONS MD (NPI 1457373946) is an individual family medicine provider in Belvidere, Illinois, licensed in Illinois (036105006) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Uw Health, and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1998).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
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
Mary Simmons Md 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 Mary Simmons reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Belvidere, IL 61008
- Reassigned Medicare billing, Illinois enrollment
- 474 clinicians in this Medicare group
Rockford, IL 61107
- Reassigned Medicare billing, Illinois enrollment
- 2,127 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 8
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Uw Health
Acute Care Hospitals · Rockford, ILSaint Anthony Medical Center
Acute Care Hospitals · Rockford, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 61008 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.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
BELVIDERE, IL 61008
BELVIDERE, IL 61008
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 Mary Simmons's NPI number?
The NPI number for Mary Simmons is 1457373946. It was assigned to this individual provider in the NPPES registry on July 24, 2006. The provider is also known as Mary Mathew.
Where is Mary Simmons located?
Mary Simmons practices at 1700 Henry Luckow Ln, Belvidere, IL 61008. The listed phone number is (779) 696-8650.
What is Mary Simmons's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mary Simmons enrolled in Medicare?
Yes. Mary Simmons 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 Mary Simmons's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Simmons reassigns Medicare benefits to 2 organizations: Swedishamerican Hospital (Belvidere, IL) and Board Of Trustees Of The University Of Illinois (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 Mary Simmons's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Simmons accept?
Health plans from Aspirus Health Plan and Quartz list Mary Simmons 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 Mary Simmons affiliated with any hospitals?
According to CMS data, Mary Simmons is affiliated with Uw Health and Saint Anthony Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Simmons was last updated on February 19, 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.
# Mary Simmons, MD · NPI 1457373946
Family Medicine physician in Belvidere, Illinois. Individual provider, active in the CMS NPPES registry since July 24, 2006.
## Identity
- **NPI:** 1457373946 (Entity type: Individual)
- **Enumerated:** July 24, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 036105006 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1700 HENRY LUCKOW LN, Belvidere, IL 61008
- **Phone:** (779) 696-8650
## 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): Swedishamerican Hospital (NPI 1417018110, Belvidere, IL); Board Of Trustees Of The University Of Illinois (NPI 1003218348, Rockford, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 1998
## Record status
- **NPPES last updated:** February 19, 2021
- **Other identifiers:** Medicaid 036105006 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1457373946) · Data from the CMS NPPES public registry.