William Oneill, MD
NPI 1881676435 · Cardiovascular Disease Physician · Naples, FL
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Oneill, MD is a Cardiovascular Disease Physician provider in Naples, FL (NPI 1881676435).
Provider details
- NPI number
- 1881676435
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301039889 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
20 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
42 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 | 16 | $98 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 13 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 13 | $97 |
Typical Medicare-allowed amounts for these services range $8–$98 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 53 | 18 |
| Atorvastatin Calcium | 26 | — |
| Ezetimibe | 24 | — |
| Metoprolol Succinate | 19 | — |
| Evolocumabbrand: Repatha Pushtronex | 19 | — |
| Potassium Chloride | 17 | — |
| Apixabanbrand: Eliquis |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$153,944 across 90 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)
- 2799 W Grand BlvdK14 Office B1417Detroit, MI 48202-2608Phone: (313) 916-1878Fax: (313) 916-2819
Registry dates
- Enumerated
- 2005-11-18
- Last updated
- 2025-04-18
- Certified
- 2025-04-18
Frequently asked questions
- What is William Oneill's NPI number?
- William Oneill's National Provider Identifier (NPI) is 1881676435, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Oneill's specialty?
- William Oneill is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Oneill located?
- William Oneill's practice location on file with NPPES is 399 9th St N Ste 300, Naples, FL 34102-5820.
- What is William Oneill's phone number?
- The practice phone number listed in the NPPES registry for William Oneill is (239) 624-4299.
- Does William Oneill accept Medicare?
- William Oneill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Oneill's NPI active?
- Yes — William Oneill's NPI (1881676435) is active in the NPPES registry as of the last update on 2025-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.