NORTHSTAR ASSOCIATES, PLLC
NORTHSTAR ASSOCIATES, PLLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1912921586, based in Bellingham, WA. The organization lists 3 taxonomy classifications, with Sleep Disorder Diagnostic Clinic/Center recorded as primary.
Getting there
The practice address on file is 1345 KING ST, Bellingham, WA 98229. 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 |
|---|---|---|
| 602 099 399 | WA | Sleep Disorder Diagnostic Clinic/Center primary |
This provider holds licence 602 099 399 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
- Part B Supplier - Clinic/group Practice
- PAC ID
- 0840196564
Enrolled in Medicare 2 times, across 1 state:
| State | Enrollment ID | Provider type |
|---|---|---|
| Washington | O20050419000886 | Part B Supplier - Clinic/group Practice |
| Washington | O20100930097443 | Dme Supplier - Physician - General Practice |
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. There are 2 separate enrolment records. Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Sleep Disorder Diagnostic covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QS1200X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 261QS1200X | Sleep Disorder Diagnostic Clinic/Center Sleep Disorder Diagnostic | 602 099 399 | WA | primary |
| 332B00000X | Durable Medical Equipment & Medical Supplies | — | — | |
| 2084S0012X | Sleep Medicine (Psychiatry & Neurology) Physician Sleep Medicine | — | — |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1912921586 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 27, 2006 |
| Last updated | Dec 5, 2025 |
| Status | Active |
| Practice address |
1345 KING ST Bellingham, WA 98229 (360) 676-1696 Fax (360) 676-6636 |
| Other identifiers |
122495122495
· Other (WA) 539108001 · Other (WA) 4824NO · Other (WA) |
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 | 9 | 1 | 2 | 9 | 2 | 1 | 5 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 2 | 2 | 9 | 2 | 2 | 5 | 7 |
Sum = 64 · next multiple of 10 = 70 · 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.