DR. JOHN WILLARD HOWELL PSY.D.
NPI 1740303163
Psychologist - Clinical in San Marcos, CA

Q: What is John Howell's NPI number?

The NPI number for John Howell is 1740303163. It was assigned to this individual provider in the NPPES registry on April 9, 2007.

Q: What is John Howell's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Q: When was this NPI record last updated?

The NPPES record for John Howell was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.

Active since April 09, 2007

333 SOUTH TWIN OAKS VALLEY ROAD, SAN MARCOS, CA 92096(425) 281-4032 Get Directions Write a Review

NPPES record last updated: March 17, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 17, 2025, May 9, 2019 (2 updates tracked since 2019).

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About Dr. John Willard Howell Psy.d. NPPES

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

DR. JOHN WILLARD HOWELL PSY.D. (NPI 1740303163) is an individual clinical provider in San Marcos, California, licensed in California (25920) and active in the NPI registry since April 2007.

NPPES Registry Identity

NPI1740303163

Entity TypeIndividualMale

Primary Taxonomy103TC0700X

Provider Legal NameDR. JOHN WILLARD HOWELLCredential: PSY.D.

Location Address333 SOUTH TWIN OAKS VALLEY ROADSan Marcos, CA 92096-4411

Mailing Address1270 Cleveland Ave Unit F349San Diego, CA 92103-3386 · (760) 682-8383

Phone(425) 281-4032

Sole ProprietorNo

Enumeration DateApril 9, 2007

Last NPPES UpdateMarch 17, 20252 updates tracked since enumeration

NPPES CertifiedMarch 17, 2025

✔ NPI 1740303163 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

Licenses✔ Licensed in CA · 25920✔ Licensed in WA · PY00003532

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

333 SOUTH TWIN OAKS VALLEY ROAD, San Marcos, CA 92096

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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 John Howell's NPI number?

The NPI number for John Howell is 1740303163. It was assigned to this individual provider in the NPPES registry on April 9, 2007.

Where is John Howell located?

John Howell practices at 333 South Twin Oaks Valley Road, San Marcos, CA 92096. The listed phone number is (425) 281-4032.

What is John Howell's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for John Howell was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.