DR. MICHAEL JON SOMMERFELD (MD) – Internal Medicine Physician, NPI 1578547063
Internal Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
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Provider Addresses for DR. MICHAEL JON SOMMERFELD (MD)
McGaw Medical Building, 800, North Westmoreland Road, Lake Forest, Lake County, Illinois, 60045, United States
SUITE 100
LAKE FOREST, IL 600451673
Phone: (847) 604-8144
Fax: (847) 234-4682
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $25.
Total Amount is formed as General ($25) + Research ($0) + Ownership ($0) = $25.
Last reported payment date: 2024-11-15 • Largest payer in this snapshot: Novo Nordisk Inc ($25).
Total Amount
$25
General + Research + Ownership
Payments
1
Total payment records
General Amount
$25
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-15
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Novo Nordisk Inc | $25 |
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: 2004-05-25
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 |
|---|---|---|---|---|
| I20040525000463 | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 192 | 122 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 146 | 82 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 136 | 136 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 67 | 65 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 47 | 43 | $0 |
Insurance plans in this area (ZIP 60045)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| N E U R O L O G Y | IL | |
| Hospitalist, Internal Medicine | IL | |
| O P H T H A L M O L O G Y | IL | |
| - | IL | |
| E N D O C R I N O L O G Y | IL | |
| Cardiovascular Disease (Cardiology), Interventional Cardiology | IL | |
| Clinical Social Worker | IL | |
| Certified Nurse Midwife (Cnm) | IL |
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