Bruce Gershenhorn, DO
NPI 1588796478 · Hematology & Oncology Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bruce Gershenhorn, DO is a Hematology & Oncology Physician provider in Mchenry, IL (NPI 1588796478).
Provider details
- NPI number
- 1588796478
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 036127065 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
612 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 257 | $100 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 169 | $144 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 74 | $99 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 54 | $147 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 25 | $8 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 95 | 23 |
| Prochlorperazine Maleate | 42 | 22 |
| Rivaroxabanbrand: Xarelto | 35 | — |
| Acalabrutinib Maleatebrand: Calquence | 28 | — |
| Prednisone | 23 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 15 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$164 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 525 E Congress Pkwy Ste 300Crystal Lake, IL 60014-6258Phone: (815) 759-9260Fax: (815) 459-7840
Registry dates
- Enumerated
- 2007-03-09
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Bruce Gershenhorn's NPI number?
- Bruce Gershenhorn's National Provider Identifier (NPI) is 1588796478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bruce Gershenhorn's specialty?
- Bruce Gershenhorn is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Bruce Gershenhorn located?
- Bruce Gershenhorn's practice location on file with NPPES is 4305 W Medical Center Dr Ste 1, Mchenry, IL 60050-8425.
- What is Bruce Gershenhorn's phone number?
- The practice phone number listed in the NPPES registry for Bruce Gershenhorn is (815) 759-8100.
- Does Bruce Gershenhorn accept Medicare?
- Bruce Gershenhorn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bruce Gershenhorn's NPI active?
- Yes — Bruce Gershenhorn's NPI (1588796478) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.