Mary Simmons, MD
Family Medicine Physician · Belvidere, IL
Mary Simmons, MD is a family medicine physician with a practice address in Belvidere, Illinois, and NPI 1457373946, issued on Jul 24, 2006. Check the license (Illinois 036105006, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Mary Simmons
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 036105006 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1700 Henry Luckow LN, Belvidere, IL 61008
- Phone
- (779) 696-8650
- Enumerated
- Jul 24, 2006
- Record last updated
- Feb 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 036105006 IL
- Medicare enrollment
- Enrolled (PECOS I20100212000403); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1998
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 1700 Henry Luckow LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cassandra Alcock, APNFamily Nurse Practitioner1073021762
- Amanda Bush, M.D.Gynecology Physician1093950941
- Amanda Castellanos, FNP-BCFamily Nurse Practitioner1841083342
- Michael Corcoran, D.P.M.Foot & Ankle Surgery Podiatrist1528374196
- Anne CunninghamFamily Nurse Practitioner1184151177
- Andrea Giamalva, MDFamily Medicine Physician1104146539
Verify Mary Simmons in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036105006Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average family medicine physician in 2024
4,746 Medicare Part D claims for 321 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 146 claims were for opioids.
Most prescribed
- Atorvastatin Calcium263 claims
- Levothyroxine Sodium244 claims
- Lisinopril235 claims
- Amlodipine Besylate217 claims
- Losartan Potassium189 claims
- Omeprazole147 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 75 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Swedishamerican HospitalBelvidere, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Simmons among 6,215 family medicine physician records in Illinois
Mary Simmons, MD is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1998 · median 2006 among the 3,714 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Belvidere
They are 20 of the 194 NPPES records with a practice address in Belvidere, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Belvidere → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Shin Chen, MDBelvidere, IL 610081437139896
- Karen Englund, MDBelvidere, IL 610081407872591
- Stephanie Gorham, MDBelvidere, IL 610081023239258
- Neal Kellenberger, MDBelvidere, IL 610081427210319
- Mohammed Khan, MDBelvidere, IL 610081679703797
- Cassandra Lopez, MDBelvidere, IL 610081619125317
- Therese Lucietto-Sieradzki, M.D.Belvidere, IL 610081699708636
- Clayton Malaker, M.D.Belvidere, IL 610081144221961
Common questions
What is Mary Simmons, MD's NPI number?
Mary Simmons, MD's National Provider Identifier (NPI) is 1457373946, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Simmons, MD located?
The NPPES record lists a practice address at 1700 Henry Luckow LN, Belvidere, IL, 61008. Phone: (779) 696-8650. Providers update this record themselves, so call before visiting.
How can I verify Mary Simmons, MD's license?
NPPES lists Illinois license number 036105006, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Simmons, MD prescribe under Medicare Part D?
In 2024, Mary Simmons, MD had 4,746 Medicare Part D claims for 321 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Mary Simmons, MD's MIPS final score?
The 2023 MIPS final score is 75 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.