Mason County
Mason County is a healthcare organization registered as Public Health or Welfare Agency in Shelton, WA, holding Type 2 (organization) NPI 1184832479 since 2007. The authorized official on file is Diana Yu, Health Officer.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1184832479 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Mason County |
| Other name | <Unavail> |
| Practice address | 303 N 4TH ST, Shelton, WA, 98584 |
| Phone | 3604279670 |
| Fax | 3604277787 |
| Enumeration date | 2007-05-18 |
| Last updated in NPPES | 2008-04-14 |
Authorized official
| Name | Diana Yu |
|---|---|
| Title | Health Officer |
| Phone | 3604279670 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 251K00000X | Public Health or Welfare Agency | Primary | MD00022826 | WA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 7144405 | Medicaid | WA | — |
| 7402720 | Medicaid | WA | — |
| 7404866 | Medicaid | WA | — |
| 5044136 | Medicaid | WA | — |
Copy-ready billing details
Provider: Mason County NPI: 1184832479 Taxonomy: 251K00000X (Public Health or Welfare Agency) Address: 303 N 4TH ST, Shelton, WA, 98584
Verify this record
Cross-check NPI 1184832479 against the authoritative CMS record: view Mason County on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
How current is this record?
Where is Mason County located?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-04-14.