MR. GERALD SIMON (MD) – Internal Medicine Physician, NPI 1861450330
Internal Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
8,828 INTERNAL MEDICINE in IL
Provider Addresses for MR. GERALD SIMON (MD)
412 63rd St
Ste 100
Downers Grove, IL 605162000
Phone: (630) 719-5470
Fax: (630) 719-1923
Type: Location
6438 JOLIET RD STE 203
COUNTRYSIDE, IL 605254624
Phone: (708) 352-5222
Fax: (708) 352-1576
Type: Location
120 W 22ND ST STE 200
OAK BROOK, IL 605231563
Phone: (630) 573-5000
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 123 Open Payments records for all available years, with a total value of $2,448.
Total Amount is formed as General ($2,448) + Research ($0) + Ownership ($0) = $2,448.
Last reported payment date: 2024-11-26 • Largest payer in this snapshot: Lilly USA, LLC ($311).
Total Amount
$2,448
General + Research + Ownership
Payments
123
Total payment records
General Amount
$2,448
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-26
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $311 |
| Amgen Inc. | $260 |
| AstraZeneca Pharmaceuticals LP | $212 |
| ABBVIE INC. | $131 |
| Dexcom, Inc. | $101 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-01-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050113000331 | I | Internal Medicine | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | 1,682 | 218 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 1,413 | 217 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 680 | 322 | $0 |
| 99308 | Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 356 | 119 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 342 | 230 | $0 |
Insurance plans in this area (ZIP 60516)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | IL | |
| Family Practice | IL | |
| Nurse Practitioner | IL | |
| Internal Medicine | IL |
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