Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Constance A Buttlar, M.D.
Anatomic Pathology & Clinical Pathology Physician in Nashua, NH · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487647301
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 30002601 | Medicaid | NH | - |
| 007941 | Other | - | TUFTS |
| 220013062 | Other | NV | RAILROAD MEDICARE |
| 783906 | Other | - | MVP INS |
| 0107574Y0NH01 | Other | NH | BC/BS |
| 6384 | Other | - | CIGNA/HEALTHSOURCE |
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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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-19.