Quick answers
- Does Gregory F. Thielen accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory F. Thielen 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 Gregory F. Thielen see?
- In 2024, CMS data shows 33 Original Medicare patients and 429 services for Gregory F. Thielen. This counts Original Medicare only and measures volume, not quality.
- What is Gregory F. Thielen's NPI number?
- 1306221510. 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 Gregory F. Thielen, 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 | 33 |
|---|---|
| Services billed to Medicare | 429 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Therapy procedure using manual technique, each 15 minutes (97140)191 services
- Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes (97110)187 services
- Evaluation for occupational therapy, typically 45 minutes (97166)24 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).
- Arthritis61%
- High blood pressure48%
- High cholesterol48%
Practice locations
Addresses where Gregory F. Thielen is enrolled with Medicare (CMS data updated October 2, 2026).
- 2797 NW 9th StCorvallis, OR 97330 (541) 207‑0910
Group practices
Medicare enrollment lists Gregory F. Thielen as a member of this group (CMS data updated October 2, 2026).
- Upper Hand Orthopaedics PC4 clinicians in the group
Specialties
Find other clinicians: Occupational Therapist in Private Practice, Oregon →
Other occupational therapists in Corvallis
Clinicians with the same Medicare primary specialty in Corvallis, OR — not a recommendation.
Other clinicians in Upper Hand Orthopaedics PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OT |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306221510 |
| 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