HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

DANIEL PATRICK O'BRIEN, MD

CARDIOVASCULAR DISEASE (CARDIOLOGY)

Medical school: UNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE

Graduated: 2018

Also: HOSPITALIST, INTERNAL MEDICINE

Offers telehealth

NPI: 1023512431

Practice Locations (3)

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

501 DEEP VALLEY DR, SUITE 100

ROLLING HILLS ESTATES, CA 902747606

3103033953

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

2020 SANTA MONICA BLVD, SUITE 210

SANTA MONICA, CA 904042139

3104582381

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

3500 LOMITA BLVD, SUITE 300

TORRANCE, CA 905055038

3102570028

Source: CMS National Downloadable File, September 2026.

DANIEL O'BRIEN, MD | HealthCareAtlasUSA