Quick answers
- Does Gregg A. Olsen accept Medicare assignment?
- Yes. Medicare's clinician data says Gregg A. Olsen 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 Gregg A. Olsen see?
- In 2024, CMS data shows 140 Original Medicare patients and 7,991 services for Gregg A. Olsen. This counts Original Medicare only and measures volume, not quality.
- What is Gregg A. Olsen's NPI number?
- 1881771236. 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 Gregg A. Olsen, 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 | 140 |
|---|---|
| Services billed to Medicare | 7,991 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)5,164 services
- Therapy procedure using manual technique, each 15 minutes (97140)2,553 services
- Evaluation for physical therapy, typically 20 minutes (97161)137 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).
- Arthritis70%
- High blood pressure66%
- High cholesterol63%
- Diabetes24%
- Depression22%
- Chronic kidney disease21%
Practice locations
Addresses where Gregg A. Olsen is enrolled with Medicare (CMS data updated October 2, 2026).
- 5053 La Mart Dr, Suite 101Riverside, CA 92507 (951) 683‑3309
Specialties
Find other clinicians: Physical Therapist in Private Practice, California →
Other physical therapists in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Clinician information
| Credential | PT |
|---|---|
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881771236 |
| 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