Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARK R DELL PSY.D.
NPI 1053635409
Psychologist in Pennington, NJ

Active since March 15, 2010
21 NEW JERSEY 31, SUITE A6A, PENNINGTON, NJ 08534(609) 439-6526 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Mark R Dell Psy.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK R DELL PSY.D. (NPI 1053635409) is an individual psychologist in Pennington, New Jersey, licensed in New Jersey (35SI00480700) and active in the NPI registry since March 2010.

NPPES Registry Identity

NPI1053635409
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. MARK R DELLCredential: PSY.D.
Location Address21 NEW JERSEY 31, SUITE A6APennington, NJ 08534-1621
Mailing Address21 Nj-31, Suite A6aPennington, NJ 08534-1621 · (609) 439-6526
Sole ProprietorYes
Enumeration DateMarch 15, 2010
Last NPPES UpdateOctober 5, 2026
NPPES CertifiedOctober 1, 2026
✔ NPI 1053635409 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in NJ · 35SI00480700
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
21 NEW JERSEY 31, Pennington, NJ 08534

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Dell's NPI number?

The NPI number for Mark Dell is 1053635409. It was assigned to this individual provider in the NPPES registry on March 15, 2010.

Where is Mark Dell located?

Mark Dell practices at 21 New Jersey 31 Suite A6a, Pennington, NJ 08534. The listed phone number is (609) 439-6526.

What is Mark Dell's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

When was this NPI record last updated?

The NPPES record for Mark Dell was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.