Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Jeffrey De Castro Mariano, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1750300521

Jeffrey De Castro Mariano, MD is an Internal Medicine in Los Angeles, California. Graduated from University of California, San Francisco School of Medicine in 2001, 25 years ago. Practices with Southern California Permanente Medical Group, an 11,242-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
25
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3699 Wilshire Blvd 3rd Fl Kaiser Dept OF Continuing Care
Los Angeles, CA 90010-2718
Phone: (323) 783-1490
Fax: (323) 783-4120
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence A81061 (CA)

Record details

NPI number1750300521
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 19, 2006
Last updated in NPPESDecember 3, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesHOSPICE/PALLIATIVE CARE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Southern California Permanente Medical Group — 11242 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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