Errol Williams, M.D.
NPI 1366456519 · Cardiovascular Disease Physician · Ontario, OH
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Errol Williams, M.D. is a Cardiovascular Disease Physician provider in Ontario, OH (NPI 1366456519).
Provider details
- NPI number
- 1366456519
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35.126917 (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
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
1,620 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 631 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 512 | $92 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 227 | $64 |
| Ultrasound of Heart With Continuous Electrocardiogram (ecg) During Rest, Exercise And/Or Drug Induced Stress With Review and Report93351 | 58 | $76 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 38 | $127 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 360 | 106 |
| Atorvastatin Calcium | 241 | 70 |
| Apixabanbrand: Eliquis | 236 | 66 |
| Losartan Potassium | 226 | 66 |
| Lisinopril | 220 | 67 |
| Furosemide | 175 | 54 |
| Metoprolol Tartrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (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)
- 629 N Sandusky AveBucyrus, OH 44820-1821Phone: (419) 462-4600
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2021-01-08
- Certified
- 2021-01-08
Frequently asked questions
- What is Errol Williams's NPI number?
- Errol Williams's National Provider Identifier (NPI) is 1366456519, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Errol Williams's specialty?
- Errol Williams is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Errol Williams located?
- Errol Williams's practice location on file with NPPES is 715 Richland Mall, Ontario, OH 44906-3802.
- What is Errol Williams's phone number?
- The practice phone number listed in the NPPES registry for Errol Williams is (419) 462-4600.
- Does Errol Williams accept Medicare?
- Errol Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Errol Williams's NPI active?
- Yes — Errol Williams's NPI (1366456519) is active in the NPPES registry as of the last update on 2021-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.