DR. BRUCE GERSHENHORN (DO) – Hematology & Oncology Physician, NPI 1588796478
Hematology & Oncology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
215 MEDICAL ONCOLOGY in IL
Provider Addresses for DR. BRUCE GERSHENHORN (DO)
525 E Congress Pkwy Ste 300
Crystal Lake, IL 600146258
Phone: (815) 759-9260
Fax: (815) 459-7840
Type: Location
2520 ELISHA AVE
ZION, IL 60099
Phone: (847) 872-6995
Type: Mailing
1221 N Highland Ave
Aurora, IL 605061404
Phone: (630) 859-8700
Type: Location
4305 W Medical Center Dr Ste 1
McHenry, IL 600508425
Phone: (815) 759-8100
Fax: (815) 759-8106
Type: Location
4305 W MEDICAL CENTER DR STE 1
MCHENRY, IL 600508425
Phone: (815) 759-8100
Fax: (815) 759-8106
Type: Location
29373 NETWORK PL
CHICAGO, IL 606731293
Phone:
Type: Mailing
3745 HIGHLAND AVE FL 2
DOWNERS GROVE, IL 605151584
Phone: (630) 275-2300
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 12 Open Payments records for all available years, with a total value of $522.
Total Amount is formed as General ($522) + Research ($0) + Ownership ($0) = $522.
Last reported payment date: 2024-11-13 • Largest payer in this snapshot: E.R. Squibb & Sons, L.L.C. ($125).
Total Amount
$522
General + Research + Ownership
Payments
12
Total payment records
General Amount
$522
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| E.R. Squibb & Sons, L.L.C. | $125 |
| Astellas Pharma US Inc | $106 |
| Janssen Biotech, Inc. | $84 |
| ImmunoGen, Inc. | $45 |
| Gilead Sciences, Inc. | $39 |
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: 2011-04-28
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 |
|---|---|---|---|---|
| I20110428000406 | I | Medical Oncology | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 341 | 232 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 309 | 165 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 121 | 81 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 48 | 48 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 23 | 23 | $0 |
Insurance plans in this area (ZIP 60014)
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