William Fusselman, MD
NPI 1659356228 · Hematology & Oncology Physician · Cedar Rapids, IA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Fusselman, MD is a Hematology & Oncology Physician provider in Cedar Rapids, IA (NPI 1659356228).
Provider details
- NPI number
- 1659356228
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32439 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
10,052 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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,476 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,409 | $10 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,014 | $9 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 725 | $15 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 698 | $124 |
| Gammaglobulin (immune System Protein) Measurement82784 | 585 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 314 | 58 |
| Hydroxyurea | 151 | 21 |
| Apixabanbrand: Eliquis | 130 | 23 |
| Levothyroxine Sodium | 112 | 22 |
| Acyclovir | 78 | 13 |
| Rivaroxabanbrand: Xarelto | 71 | 14 |
| Prednisone | 69 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 across 8 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
Registry dates
- Enumerated
- 2005-12-07
- Last updated
- 2025-08-25
- Certified
- 2025-08-05
Frequently asked questions
- What is William Fusselman's NPI number?
- William Fusselman's National Provider Identifier (NPI) is 1659356228, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Fusselman's specialty?
- William Fusselman is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is William Fusselman located?
- William Fusselman's practice location on file with NPPES is 202 10th Street Se, Cedar Rapids, IA 52403-2404.
- What is William Fusselman's phone number?
- The practice phone number listed in the NPPES registry for William Fusselman is (319) 297-2900.
- Does William Fusselman accept Medicare?
- William Fusselman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Fusselman's NPI active?
- Yes — William Fusselman's NPI (1659356228) is active in the NPPES registry as of the last update on 2025-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.