Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Gregory Thielen, OTR

Individual provider Hand Occupational Therapist · NPI 1306221510

Gregory Thielen, OTR is an Occupational Therapist in Private Practice in Corvallis, Oregon. Qualified in 1986, 40 years ago. Practices with Upper Hand Orthopaedics PC, a 5-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
40
Licensed in
OR
In the registry since
2015
What do these letters mean?
OTR — Occupational Therapist, Registered
A nationally registered occupational therapist.

See every abbreviation used in this directory →

Practice location Address checks out

2797 NW 9th St
Corvallis, OR 97330-3857
Phone: (541) 207-0910
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hand Occupational Therapist (primary) Taxonomy 225XH1200X · Licence 914584 (OR)

Record details

NPI number1306221510
Entity typeIndividual (Type 1)
GenderMale
Credentials OTR
Sole proprietorNo
NPI enumeratedJuly 29, 2015
Last updated in NPPESJuly 29, 2015
Mailing address2797 Nw 9th St, Corvallis, OR 97330-3857

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOCCUPATIONAL THERAPIST IN PRIVATE PRACTICE
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice Upper Hand Orthopaedics Pc — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount