Quick answers
- Does Sylvester E. Onyishi accept Medicare assignment?
- Yes. Medicare's clinician data says Sylvester E. Onyishi 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 Sylvester E. Onyishi see?
- In 2024, CMS data shows 564 Original Medicare patients and 1,821 services for Sylvester E. Onyishi. This counts Original Medicare only and measures volume, not quality.
- What is Sylvester E. Onyishi's NPI number?
- 1952697559. 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 Sylvester E. Onyishi, 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 | 564 |
|---|---|
| Services billed to Medicare | 1,821 |
| Different services or procedures | 63 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)555 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)241 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)236 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)82 services
- Diagnostic exam of bladder and urethra using an endoscope (52000)75 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%
- Arthritis56%
- Ischemic heart disease52%
- Diabetes40%
- Chronic kidney disease37%
Hospitals where Sylvester E. Onyishi works
Medicare's Facility Affiliation Data lists Sylvester E. Onyishi 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.
- AdventHealth SebringSebring, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100109
- AdventHealth WauchulaWauchula, FL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 101300
- HCA Florida Highlands HospitalSebring, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100049
Practice locations
Addresses where Sylvester E. Onyishi is enrolled with Medicare (CMS data updated October 2, 2026).
- 4200 Sun N Lake BlvdSebring, FL 33872 (863) 314‑4466
- 4325 Sun N Lake Blvd, Suite 105Sebring, FL 33872 (863) 382‑2248
- 533 Carlton StWauchula, FL 33873 (863) 773‑3101
Group practices
Medicare enrollment lists Sylvester E. Onyishi as a member of this group (CMS data updated October 2, 2026).
- Adventist Health System-Sunbelt Inc88 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Florida
Clinicians with the same Medicare primary specialty in Florida — not a recommendation.
Other clinicians in Adventist Health System-Sunbelt Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Tennessee, Hsc, College Of Medicine |
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952697559 |
| 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