MARK E CLAYCOMB LCSW
NPI 1790791796
Psychologist in San Francisco, CA

Active since July 31, 2006
55 NEW MONTGOMERY ST, #420, SAN FRANCISCO, CA 94105(415) 522-7400(445) 543-1932 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mark E Claycomb Lcsw NPPES

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

MARK E CLAYCOMB LCSW (NPI 1790791796) is an individual psychologist in San Francisco, California, licensed in California (LCS135532) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1790791796
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameMARK E CLAYCOMBCredential: LCSW
Location Address55 NEW MONTGOMERY ST, #420San Francisco, CA 94105
Mailing Address55 New Montgomery St, #420San Francisco, CA 94105 · (415) 522-7400 · Fax (445) 543-1932
Fax(445) 543-1932
Sole ProprietorNo
Enumeration DateJuly 31, 2006
Last NPPES UpdateSeptember 11, 2025
NPI 1790791796 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in CA · LCS135532
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.
Also ListedSocial WorkerTaxonomy 104100000X · License LCS13553 (CA)

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Psychologist
55 NEW MONTGOMERY ST, STE #420
SAN FRANCISCO, CA 94105
Psychologist
55 NEW MONTGOMERY ST, SUITE 512
SAN FRANCISCO, CA 94105
Psychologist (Clinical)
55 NEW MONTGOMERY ST, SUITE 424
SAN FRANCISCO, CA 94105
Psychologist (Clinical)
55 NEW MONTGOMERY ST, SUITE 512
SAN FRANCISCO, CA 94105
Psychologist (Clinical)
55 NEW MONTGOMERY ST, STE 420
SAN FRANCISCO, CA 94105
Psychologist (Clinical)
55 NEW MONTGOMERY ST, SUITE 420
SAN FRANCISCO, CA 94105
Psychologist
55 NEW MONTGOMERY ST, STE 424
SAN FRANCISCO, CA 94105
Psychologist (Clinical)
55 NEW MONTGOMERY ST, SUITE 506
SAN FRANCISCO, CA 94105

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 Claycomb's NPI number?

The NPI number for Mark Claycomb is 1790791796. It was assigned to this individual provider in the NPPES registry on July 31, 2006.

Where is Mark Claycomb located?

Mark Claycomb practices at 55 New Montgomery St #420, San Francisco, CA 94105. The listed phone number is (415) 522-7400.

What is Mark Claycomb'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 Claycomb was last updated on September 11, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.