DR. DENNIS ALAN PEACOCK (MD) – Internal Medicine Physician, NPI 1023223021
Internal Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
8,824 INTERNAL MEDICINE in IL
Provider Addresses for DR. DENNIS ALAN PEACOCK (MD)
635 N Dearborn St Ste 100
Chicago, IL 606544618
Phone: (312) 694-2273
Fax: (312) 694-2129
Type: Location
680 North Lake Shore Drive, 680, North Lake Shore Drive, Streeterville, Near North Side, Chicago, Cook County, Illinois, 60611, United States
CHICAGO, IL 606112987
Phone: (312) 695-6868
Type: Mailing
West Belmont Avenue, Hermosa, Chicago, Jefferson Township, Cook County, Illinois, 60641, United States
CHICAGO, IL 60657
Phone: (312) 694-2273
Fax: (312) 694-1875
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2017-02-06
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 |
|---|---|---|---|---|
| I20170206001786 | 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 |
|---|---|---|---|---|
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 92 | 92 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 31 | 31 | $0 |
| 99202 | New patient office or other outpatient visit, 15-29 minutes | 23 | 23 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 20 | 19 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 16 | 16 | $0 |
Insurance plans in this area (ZIP 60654)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IL | |
| Diagnostic Radiology, Interventional Radiology | IL | |
| P A T H O L O G Y | IL | |
| Interventional Cardiology, Cardiovascular Disease (Cardiology), Internal Medicine | IL | |
| G A S T R O E N T E R O L O G Y | IL | |
| Internal Medicine | IL | |
| Cardiac Electrophysiology, Cardiovascular Disease (Cardiology), Internal Medicine | MN | |
| - | IL | |
| Physical Therapist In Private Practice | IL | |
| Nurse Practitioner | IL |
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