Daniel O'brien, - Internal Medicine in Rolling Hills Estates, CA

Daniel O'brien, is a Internal Medicine physician based in Rolling Hills Estates, California. Daniel O'brien is licensed to practice in California (license number A165839) and his current practice location is 501 Deep Valley Dr Ste 100, Rolling Hills Estates, California. He can be reached at his office (for appointments etc.) via phone at (310) 303-3953.

NPI number for Daniel O'brien is 1023512431 and his current mailing address is 5767 W Century Blvd Ste 400, Los Angeles, California. He does not participate in medicare program and thus does not accept medicare assignments. 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
SpecialityInternal Medicine
Location501 Deep Valley Dr Ste 100, Rolling Hills Estates, California
Accepts Medicare AssignmentsDoes not participate in Medicare Program. He may not accept medicare assignment.
  NPI Data:
  • NPI Number: 1023512431
  • Provider Enumeration Date: 03/20/2018
  • Last Update Date: 09/18/2025

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
207R00000XInternal Medicine A165839 (California)Primary
207RC0000XInternal Medicine - Cardiovascular Disease A165839 (California)Secondary

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 NOT enrolled with medicare and thus cannot 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,
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 501 Deep Valley Dr Ste 100, Rolling Hills Estates, CA 90274
Phone: 310-303-3953    
Anna Mellor, MD
Internal Medicine
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.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 602 Deep Valley Dr, Rolling Hills Estates, CA 90274
Phone: 310-517-4692    
Dr. Omer J Deen, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 46 Peninsula Ctr, Rolling Hills Estates, CA 90274
Phone: 310-994-5679    
Christine Aiko Kuida, MD
Internal Medicine
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.
Internal Medicine
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.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.