Quick answers
- Does Onsi N. Derias accept Medicare assignment?
- Yes. Medicare's clinician data says Onsi N. Derias 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 Onsi N. Derias see?
- In 2024, CMS data shows 174 Original Medicare patients and 8,161 services for Onsi N. Derias. This counts Original Medicare only and measures volume, not quality.
- What is Onsi N. Derias's NPI number?
- 1841340254. 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 Onsi N. Derias, 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 | 174 |
|---|---|
| Services billed to Medicare | 8,161 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)3,988 services
- Therapy procedure using manual technique, each 15 minutes (97140)1,468 services
- Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of care (G0283)1,421 services
- Application of blood vessel compression device (97016)1,092 services
- Evaluation for physical therapy, typically 30 minutes (97162)152 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%
- Arthritis75%
- Ischemic heart disease37%
- Chronic kidney disease30%
- Atrial fibrillation23%
Practice locations
Addresses where Onsi N. Derias is enrolled with Medicare (CMS data updated October 2, 2026).
- 773 Hwy 466Lady Lake, FL 32159 (239) 768‑6396
Group practices
Medicare enrollment lists Onsi N. Derias as a member of this group (CMS data updated October 2, 2026).
- Wellness by Physicians Inc10 clinicians in the group
Specialties
Find other clinicians: Physical Therapist in Private Practice, Florida →
Other physical therapists in Lady Lake
Clinicians with the same Medicare primary specialty in Lady Lake, FL — not a recommendation.
Other clinicians in Wellness by Physicians Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841340254 |
| 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
- 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