NPI Portal NPI Lookup & Verification

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

Dr. John Mark Carper, ED.D.

Clinical Psychologist in Winthrop, MA · enumerated 2007.

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

National Provider Identifier

1730220039

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Registry record

Entity type Individual (Type 1)
Name Dr. John Mark Carper
Credential ED.D.
Sex Male
Practice address Winthrop, MA, 02152
Phone (617) 846-5383
Fax (617) 846-1650
Enumeration date Feb 9, 2007
Last updated in NPPES Nov 29, 2011

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

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 3856 (MA) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 3856 (MA) Primary

Other identifiers

Identifier Type State Issuer
3856 Other MA LIC.. (PSYCHOL.PROVIDER)
0516678 Medicaid MA -

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 → Validate an NPI →

Frequently asked questions

Where does John Carper practice?
The practice location on file with NPPES is in Winthrop, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Carper?
The National Provider Identifier (NPI) for John Carper is 1730220039, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-29.