Kerri Arenholz, OTR
Kerri Arenholz, OTR is a Hand Occupational Therapist in Seattle, WA, registered under NPI 1780607424. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 2004 E UNION ST, Seattle, WA 98122. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 00004420 | WA | Hand Occupational Therapist primary |
This provider holds licence 00004420 issued in WA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Occupational Therapist In Private Practice
- PAC ID
- 0749285484
- Enrollment ID
- I20091030000024
Medicare enrolment is recorded as approved under the provider type Practitioner - Occupational Therapist In Private Practice. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hand covers
Definition to come... NUCC Health Care Provider Taxonomy, code 225XH1200X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1780607424 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 25, 2006 |
| Last updated | Mar 11, 2011 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | OTR |
| Practice address |
2004 E UNION ST Seattle, WA 98122 (206) 595-7649 |
| Mailing address |
537 26TH AVE Seattle, WA 98122 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 7 | 8 | 0 | 6 | 0 | 7 | 4 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 7 | 0 | 3 | 0 | 5 | 4 | 4 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.