Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Ms. Michelle A Mathiesen, LICSW
Clinical Social Worker in Warwick, RI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154372191
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1032430 | Other | RI | NEIGHBORHOOD HEALTH PLAN |
| 29590-9 | Other | RI | BLUE CROSS/BLUE SHIELD |
| 412646 | Other | RI | BLUE CHIP |
| MM54608 | Medicaid | RI | - |
| MM59098 | Medicaid | RI | - |
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.
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-30.