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WILLIAM THOMAS HARLESS M.D.
NPI 1366452823
Internal Medicine in San Diego, CA

Active since August 08, 2006
300 FIR ST, SAN DIEGO, CA 92101(858) 499-2600(619) 446-1569 Get Directions Write a Review

NPPES record last updated: June 19, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William Thomas Harless M.d. NPPES

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

WILLIAM THOMAS HARLESS M.D. (NPI 1366452823) is an individual internal medicine provider in San Diego, California, licensed in California (G27839) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1366452823
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM THOMAS HARLESSCredential: M.D.
Location Address300 FIR STSan Diego, CA 92101-2327
Mailing Address300 Fir StSan Diego, CA 92101-2327 · (858) 499-2600 · Fax (619) 446-1569
Phone(858) 499-2600
Fax(619) 446-1569
Sole ProprietorNo
Enumeration DateAugust 8, 2006
Last NPPES UpdateJune 19, 2013
✔ NPI 1366452823 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 · G27839
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.
300 FIR ST, San Diego, CA 92101
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Other Identifiers 3

Medicaid00G278390CA
Medicare UPINA43514CA
Medicare OSCAR/certificationWG27839ACA

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.

DR. CORINNE ASHLEY YARBROUGH M.D.
Internal Medicine
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (858) 499-2600
FREDERICK Y FUNG M.D.
Preventive Medicine (Occupational Medicine)
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1510
KRISTIE YEE DANG
Pharmacist
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1512
DR. HECTOR MORALES JR. PHARM D
Pharmacist
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1512
CHRISTOPHER F. FERNANDEZ DEL RIEGO M.D.
Family Medicine
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (504) 813-4825
MAHSHID CHEHREHRAZI
Physical Therapist
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1730
MISS NANCY B JUNGLING MSPT
Physical Therapist
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1730
DR. BARBARA YU HSU M.D.
Radiology (Diagnostic Radiology)
300 FIR ST
SAN DIEGO, CA 92101
San Diego County (619) 446-1586

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 William Harless's NPI number?

The NPI number for William Harless is 1366452823. It was assigned to this individual provider in the NPPES registry on August 8, 2006.

Where is William Harless located?

William Harless practices at 300 Fir St, San Diego, CA 92101. The listed phone number is (858) 499-2600.

What is William Harless'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 William Harless was last updated on June 19, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.