AARON HARRIS COHN (M.D.) – Gastroenterology Physician, NPI 1841586211
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
978 GASTROENTEROLOGY in IL
Provider Addresses for AARON HARRIS COHN (M.D.)
5841 S Maryland Ave
Chicago, IL 606371447
Phone: (773) 702-1000
Type: Location
10103 Ridgegate Pkwy Ste 312
Lone Tree, CO 801245525
Phone: (303) 788-8888
Fax: (303) 790-2567
Type: Location
1475 E BELVIDERE RD STE 301
GRAYSLAKE, IL 600302016
Phone: (847) 535-6083
Fax: (224) 271-4910
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 24 Open Payments records for all available years, with a total value of $6,998.
Total Amount is formed as General ($6,998) + Research ($0) + Ownership ($0) = $6,998.
Last reported payment date: 2024-10-02 • Largest payer in this snapshot: Ferring Pharmaceuticals Inc. ($4,275).
Total Amount
$6,998
General + Research + Ownership
Payments
24
Total payment records
General Amount
$6,998
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-02
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Ferring Pharmaceuticals Inc. | $4,275 |
| ABBVIE INC. | $2,270 |
| Janssen Biotech, Inc. | $247 |
| AIMMUNE THERAPEUTICS, INC. | $125 |
| Medtronic, Inc. | $56 |
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: 2018-10-30
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20181030000302 | I | Gastroenterology | 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 |
|---|---|---|---|---|
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 122 | 122 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 116 | 102 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 76 | 76 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 71 | 71 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 70 | 70 | $0 |
Insurance plans in this area (ZIP 60637)
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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 | |
| A N E S T H E S I O L O G Y | MI | |
| Nurse Practitioner | IL |
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