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

DR. MERRITT L. HOUGEN M.D.
NPI 1851368252
Internal Medicine in La Jolla, CA

Active since March 03, 2006
10666 N TORREY PINES RD, LA JOLLA, CA 92037(858) 554-7810(858) 784-5933 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Merritt L. Hougen M.d. NPPES

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

DR. MERRITT L. HOUGEN M.D. (NPI 1851368252) is an individual internal medicine provider in La Jolla, California, licensed in California (G31625) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1851368252
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MERRITT L. HOUGENCredential: M.D.
Location Address10666 N TORREY PINES RDLa Jolla, CA 92037-1027
Mailing AddressFile# 54433Los Angeles, CA 90074-0001 · (858) 784-5906 · Fax (858) 784-5933
Phone(858) 554-7810
Fax(858) 784-5933
Sole ProprietorNo
Enumeration DateMarch 3, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1851368252 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G31625
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
10666 N TORREY PINES RD, La Jolla, CA 92037
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Other Identifiers 1

Medicaid00G316250CA

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.

NATALIE ALBASHA MD
Student in an Organized Health Care Education/Training Program
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-3200
MRS. SUSAN ELIZABETH MCKIM PA-C
Physician Assistant (Medical)
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-8646
ROBERT R. VARNEY M.D.
Radiology (Vascular & Interventional Radiology)
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 626-7275
DR. ERMINIA M. GUARNERI M.D.
Internal Medicine (Cardiovascular Disease)
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-3330
KATRINA DELEON MD
Internal Medicine (Geriatric Medicine)
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-6158
VIRGINIA CHAN MD
Hospitalist
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-3200
NOOR QADDOUR DO
Hospitalist
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-7909
DR. DEAN J. VAYSER D.P.M.
Podiatrist
10666 N TORREY PINES RD
LA JOLLA, CA 92037
San Diego County (858) 554-9300

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 Merritt Hougen's NPI number?

The NPI number for Merritt Hougen is 1851368252. It was assigned to this individual provider in the NPPES registry on March 3, 2006.

Where is Merritt Hougen located?

Merritt Hougen practices at 10666 N Torrey Pines Rd, La Jolla, CA 92037. The listed phone number is (858) 554-7810.

What is Merritt Hougen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Merritt Hougen was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 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.