Gerald Simon, MD
NPI 1861450330 · Internal Medicine Physician · Countryside, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Simon, MD is a Internal Medicine Physician provider in Countryside, IL (NPI 1861450330).
Provider details
- NPI number
- 1861450330
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36066840 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
5,187 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 1,326 | $61 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 1,280 | $77 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 672 | $125 |
| 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 | 328 | $16 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 309 | $111 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 190 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 798 | 189 |
| Levothyroxine Sodium | 548 | 120 |
| Apixabanbrand: Eliquis | 539 | 100 |
| Amlodipine Besylate | 457 | 118 |
| Metoprolol Tartrate | 395 | 97 |
| Furosemide | 386 | 85 |
| Potassium Chloride |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,092 across 55 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 412 63rd StSte 100Downers Grove, IL 60516-2000Phone: (630) 719-5470Fax: (630) 719-1923
Registry dates
- Enumerated
- 2006-05-03
- Last updated
- 2023-02-01
- Certified
- 2023-02-01
Frequently asked questions
- What is Gerald Simon's NPI number?
- Gerald Simon's National Provider Identifier (NPI) is 1861450330, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Simon's specialty?
- Gerald Simon is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Simon located?
- Gerald Simon's practice location on file with NPPES is 6438 Joliet Rd Ste 203, Countryside, IL 60525-4624.
- What is Gerald Simon's phone number?
- The practice phone number listed in the NPPES registry for Gerald Simon is (708) 352-5222.
- Does Gerald Simon accept Medicare?
- Gerald Simon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Simon's NPI active?
- Yes — Gerald Simon's NPI (1861450330) is active in the NPPES registry as of the last update on 2023-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.