NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Troy Douglas Carr, PHD

School Psychologist in Lexington, MA · enumerated 2017 · practices at Child Development Partners, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1073027173

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Registry record

Entity type Individual (Type 1)
Name Dr. Troy Douglas Carr
Credential PHD
Sex Male
Practice address Lexington, MA, 02420
Phone (978) 270-6420
Enumeration date Nov 28, 2017
Last updated in NPPES Nov 28, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TS0200X School Psychologist Behavioral Health & Social Service Providers · License 404589 (MA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Troy Carr?
Troy Carr is registered in NPPES with the primary taxonomy of School Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-28.