Daniel O'brien, - Medicare Cardiovascular Disease (cardiology) in Rolling Hills Estates, CA

Daniel O'brien, is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in Rolling Hills Estates, California. He went to University Of Southern California Keck School Of Medicine and graduated in 2018 and has 8 years of diverse experience with area of expertise as Cardiovascular Disease (cardiology). He is a member of the group practice The Regents Of The University Of California and his current practice location is 501 Deep Valley Dr Ste 100, Rolling Hills Estates, California. You can reach out to his office (for appointments etc.) via phone at (310) 303-3953.

Daniel O'brien is licensed to practice in California (license number A165839) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1023512431.

Contact Information

Daniel O'brien,
501 Deep Valley Dr Ste 100,
Rolling Hills Estates, CA 90274-7606
(310) 303-3953
(310) 303-7903

Map and Direction




Physician's Profile

Full NameDaniel O'brien
GenderMale
SpecialityCardiovascular Disease (cardiology)
Experience8 Years
Location501 Deep Valley Dr Ste 100, Rolling Hills Estates, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Daniel O'brien attended and graduated from University Of Southern California Keck School Of Medicine in 2018
  NPI Data:
  • NPI Number: 1023512431
  • Provider Enumeration Date: 03/20/2018
  • Last Update Date: 03/25/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 9830598010
  • Enrollment ID: I20210519002632

Medical Identifiers

Medical identifiers for Daniel O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023512431NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0000XInternal Medicine - Cardiovascular Disease A165839 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Torrance Memorial Medical CenterTorrance, CAHospital
Providence Little Company Of Mary Med Ctr TorranceTorrance, CAHospital
Ronald Reagan Ucla Medical CenterLos angeles, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
The Regents Of The University Of California13552485841428

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Daniel O'brien is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Daniel O'brien,
5767 W Century Blvd Ste 400,
Los Angeles, CA 90045-5631

Ph: () -
Daniel O'brien,
501 Deep Valley Dr Ste 100,
Rolling Hills Estates, CA 90274-7606

Ph: (310) 303-3953

Reviews and Comments


Internal Medicine Doctors in Rolling Hills Estates, CA

Hanbyul Choi,
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 501 Deep Valley Dr Ste 100, Rolling Hills Estates, CA 90274
Phone: 310-303-3953    
Anna Mellor, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 602 Deep Valley Dr Ste 314, Rolling Hills Estates, CA 90274
Phone: 310-645-1024    Fax: 213-618-3367
Hiva Bastanmehr, M.D.
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 602 Deep Valley Dr, Rolling Hills Estates, CA 90274
Phone: 310-517-4692    
Dr. Omer J Deen, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 46 Peninsula Ctr, Rolling Hills Estates, CA 90274
Phone: 310-994-5679    
Christine Aiko Kuida, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 927 Deep Valley Dr, Suite 255, Rolling Hills Estates, CA 90274
Phone: 310-541-9511    Fax: 310-541-9535
Lorena Margarita Layrisse Landaeta, M.D.
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 602 Deep Valley Dr Ste 300, Rolling Hills Estates, CA 90274
Phone: 310-517-4692    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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