Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum
Calloway Laboratories Inc.
Clinical Medical Laboratory in Woburn, MA · enumerated 2006 · authorized official Gail Marcus, Ceo.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1902826381
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Registry record
Taxonomy & classification
Authorized official
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 408740200 | Medicaid | MD | - |
| 609588 | Medicaid | NH | - |
| 612379401A | Medicaid | GA | - |
| 13255371 | Medicaid | CO | - |
| 690000029 | Medicaid | AL | - |
| 1012731860001 | Medicaid | PA | - |
| 2555391 | Medicaid | OH | - |
| 003123106 | Medicaid | CT | - |
| 100505833 | Medicaid | FL | - |
| 1012456 | Medicaid | VT | - |
| 941593 | Medicaid | AZ | - |
| 0800139 | Medicaid | MA | - |
| 2555391 | Medicaid | NV | - |
| L00205 | Medicaid | SC | - |
| 0097098 | Medicaid | NJ | - |
| 416390000 | Medicaid | ME | - |
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.
Frequently asked questions
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Providers at this address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-10.