William Gianakopoulos, M.D.
NPI 1841239142 · Urology Physician · London, OH
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gianakopoulos, M.D. is a Urology Physician provider in London, OH (NPI 1841239142).
Provider details
- NPI number
- 1841239142
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35062534 (OH)
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
6 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,007 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) |
|---|---|---|
| Principal Care Management Services for a Single High-Risk Disease, First 30 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99426 | 399 | $59 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 291 | $59 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 254 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 161 | $85 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 113 | $9 |
| Automated Urinalysis Test |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Finasteride | 500 | 162 |
| Tamsulosin Hcl | 363 | 128 |
| Prednisone | 182 | 23 |
| Abiraterone Acetate | 112 | 12 |
| Enzalutamidebrand: Xtandi | 82 | — |
| Apalutamidebrand: Erleada | 77 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 56 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$647 across 26 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 (5)
- 701 Tech Center DrGahanna, OH 43230-1987Phone: (614) 396-2684Fax: (614) 396-2480
- 620a Morrison RdGahanna, OH 43230-5327Phone: (614) 396-2684Fax: (614) 396-2480
- 3958 Leap Rd Ste 101Hilliard, OH 43026-3107Phone: (614) 396-2684Fax: (614) 396-2480
- 1030 Refugee Rd Ste 299Pickerington, OH 43147-9755Phone: (614) 396-2684Fax: (614) 396-2480
- 350 W Wilson Bridge Rd Ste 100Worthington, OH 43085-2590Phone: (614) 796-2900Fax: (614) 796-2901
Registry dates
- Enumerated
- 2006-06-05
- Last updated
- 2024-10-16
- Certified
- 2024-10-16
Frequently asked questions
- What is William Gianakopoulos's NPI number?
- William Gianakopoulos's National Provider Identifier (NPI) is 1841239142, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gianakopoulos's specialty?
- William Gianakopoulos is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is William Gianakopoulos located?
- William Gianakopoulos's practice location on file with NPPES is 210 N Main St, London, OH 43140-1115.
- What is William Gianakopoulos's phone number?
- The practice phone number listed in the NPPES registry for William Gianakopoulos is (740) 845-7700.
- Does William Gianakopoulos accept Medicare?
- William Gianakopoulos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gianakopoulos's NPI active?
- Yes — William Gianakopoulos's NPI (1841239142) is active in the NPPES registry as of the last update on 2024-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.