Mary Simmons, MD
NPI 1457373946 · Family Medicine Physician · Belvidere, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Simmons, MD is a Family Medicine Physician provider in Belvidere, IL (NPI 1457373946).
Provider details
- NPI number
- 1457373946
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036105006 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
561 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 154 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 125 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 104 | $123 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 84 | $87 |
| Administration of Influenza Virus VaccineG0008 | 29 | $31 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 88 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 263 | 71 |
| Levothyroxine Sodium | 244 | 57 |
| Lisinopril | 235 | 68 |
| Amlodipine Besylate | 217 | 57 |
| Losartan Potassium | 189 | 52 |
| Omeprazole | 147 | 47 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2021-02-19
- Certified
- 2021-02-19
Frequently asked questions
- What is Mary Simmons's NPI number?
- Mary Simmons's National Provider Identifier (NPI) is 1457373946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Simmons's specialty?
- Mary Simmons is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Simmons located?
- Mary Simmons's practice location on file with NPPES is 1700 Henry Luckow Ln, Belvidere, IL 61008.
- What is Mary Simmons's phone number?
- The practice phone number listed in the NPPES registry for Mary Simmons is (779) 696-8650.
- Does Mary Simmons accept Medicare?
- Mary Simmons is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Simmons's NPI active?
- Yes — Mary Simmons's NPI (1457373946) is active in the NPPES registry as of the last update on 2021-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.