NPI Portal NPI Lookup & Verification

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

Dr. Ellen J. Marx, PH.D.

Clinical Psychologist in Poughkeepsie, NY · enumerated 2006.

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

National Provider Identifier

1790716264

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Registry record

Entity type Individual (Type 1)
Name Dr. Ellen J. Marx
Credential PH.D.
Sex Female
Practice address Poughkeepsie, NY, 12601
Phone (845) 486-3570
Fax (845) 486-3599
Enumeration date Jul 5, 2006
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 012065 (NY) Primary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 35S100343600 (NJ) Secondary
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

What is the NPI number for Ellen Marx?
The National Provider Identifier (NPI) for Ellen Marx is 1790716264, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ellen Marx practice?
The practice location on file with NPPES is in Poughkeepsie, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.