Quick answers
- Does Errol B. Williams Ii accept Medicare assignment?
- Yes. Medicare's clinician data says Errol B. Williams Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Errol B. Williams Ii see?
- In 2024, CMS data shows 639 Original Medicare patients and 1,661 services for Errol B. Williams Ii. This counts Original Medicare only and measures volume, not quality.
- What is Errol B. Williams Ii's NPI number?
- 1366456519. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Errol B. Williams Ii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 639 |
|---|---|
| Services billed to Medicare | 1,661 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)631 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)512 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)227 services
- Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report (93351)58 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)38 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Ischemic heart disease41%
- Diabetes40%
- Chronic kidney disease35%
Hospitals where Errol B. Williams Ii works
Medicare's Facility Affiliation Data lists Errol B. Williams Ii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Avita OntarioOntario, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360365
- Bucyrus Community HospitalBucyrus, OH · Critical Access Hospital · Emergency services: listed by Medicare · CCN 361316
- Galion Community HospitalGalion, OH · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 361325
- OhioHealth Mansfield HospitalMansfield, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360118
- Riverside Methodist HospitalColumbus, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360006
Practice locations
Addresses where Errol B. Williams Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 24 E Whitney AveShelby, OH 44875 (567) 247‑0870
- 269 Portland Way SGalion, OH 44833 (419) 468‑4841
- 2981 W 4th StOntario, OH 44906 (419) 468‑0505
- 629 N Sandusky AveBucyrus, OH 44820 (419) 562‑4677
- 715 Richland MallOntario, OH 44906 (567) 307‑7557
Group practices
Medicare enrollment lists Errol B. Williams Ii as a member of this group (CMS data updated October 2, 2026).
- North Central Ohio Family Care Center Inc195 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Ohio →
Other cardiologists in Shelby
Clinicians with the same Medicare primary specialty in Shelby, OH — not a recommendation.
Other clinicians in North Central Ohio Family Care Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366456519 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians