Daniel O'brien
Cardiovascular Disease · Rolling Hills Estates, CA
At a glance
501 Deep Valley Dr Ste 100, Rolling Hills Estates, CA 90274-7606
NPPES record updated Mar 25, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
501 Deep Valley Dr Ste 100Rolling Hills Estates, CA 90274-7606
Additional reported practice locations
757 Westwood PlzLos Angeles, CA 900958358
Phone: 3108259111 200 Ucla Medical Plz Ste 420
Los Angeles, CA 900958358
Phone: 3102066232
Education & affiliations
- Medical / professional school
- University Of Southern California Keck School Of Medicine
- Graduation year
- 2018
- CMS specialties
- Cardiovascular Disease (Cardiology) · Hospitalist · Internal Medicine
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
Reported hospital affiliations
- Providence Little Company Of Mary Med Ctr Torrance Torrance, CA
- Ronald Reagan Ucla Medical Center Los Angeles, CA
- Torrance Memorial Medical Center Torrance, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Cardiovascular Disease
- Taxonomy code
- 207RC0000X
- Enumeration date
- Mar 20, 2018
- Record updated
- Mar 25, 2026
More registry details
- Provider type
- Individual · Type 1
Reported taxonomies and licenses
207RC0000X · Primary
License reported: A165839 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
501 Deep Valley Dr Ste 100Rolling Hills Estates, CA 90274-7606
- Phone
- (310) 303-3953
- Fax
- (310) 303-7903
Mailing address
5767 W CENTURY BLVD STE 400LOS ANGELES, CA 900455631
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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