Therese Mastin, M.A., QMHP
Therese Mastin, M.A., QMHP is a Professional Counselor in Cottage Grove, OR, registered under NPI 1003059296.
Getting there
Here is what surrounds this office in Cottage Grove, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 0.31 mi away. There is EV charging 0.42 mi from the office (Blink) — useful if you are driving in from out of town. The nearest transit stop is 0.45 mi away. If you arrive early, there is a coffee shop 0.45 mi away.
Getting here and what is nearby
Transit 0.28 mi ~6 min
Parking 0.29 mi ~6 min
09:00-19:00
Convenience Main Street Market 0.30 mi ~7 min
822 West Main Street, Cottage Grove 97424-2057
Mo-Fr 07:00-21:00; Sa-Su 08:00-21:00
Parking 0.30 mi ~7 min
Transit Meals on Wheels 0.31 mi ~7 min
Parking 0.31 mi ~7 min
09:00-19:00
EV charging Blink 0.42 mi ~9 min
Restaurant Jack Sprats 0.44 mi ~9 min
510 East Main Street, Cottage Grove 97424
Mo-Th, Su 11:00-19:00; Fr, Sa 11:00-20:00
Transit 0.45 mi ~10 min
Coffee Slabtown Coffee 0.45 mi ~9 min
518 East Main Street, Cottage Grove 97424
07:00-19:00
Restaurant The Grove 0.46 mi ~10 min
521 East Main Street, Cottage Grove 97424
Mo-Fr 11:00-24:00; Sa,Su 10:00-24:00
Restaurant Thai on Main Bistro 0.48 mi ~10 min
603 East Main Street, Cottage Grove 97424
Mo-Su 11:00-20:00
Convenience Juanita's Latina Store 0.49 mi ~10 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| C8458 | OR | Professional Counselor primary |
This provider holds licence C8458 issued in OR. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Professional covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YP2500X
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 | 1003059296 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 17, 2009 |
| Last updated | Jun 10, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | M.A., QMHP |
| Practice address |
1345 BIRCH AVE Cottage Grove, OR 97424 (541) 942-3939 Fax (541) 942-9310 |
| Mailing address |
410 N 9TH ST PO BOX 5 Cottage Grove, OR 97424 |
| Other identifiers |
019047
· Medicaid (OR) |
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 | 0 | 0 | 3 | 0 | 5 | 9 | 2 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 5 | 9 | 2 | 9 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.