Daniel O'Brien
Cardiology·Rolling Hills Estates, CA
Daniel O'Brien is a Cardiology provider in Rolling Hills Estates, CA, as of July 2026.
- NPI1023512431
- Registered2018
- Class of2018
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Daniel O'Brien at a glance
- Provider
- Daniel O'Brien
- Specialty
- Cardiovascular Disease (Cardiology)
- Procedures
- Cardiology CPT codes
- Location
- Rolling Hills Estates, CA
- Medical school
- University of Southern California Keck School of Medicine
- Graduated
- 2018
- NPI registered
- 2018
- NPI
- 1023512431
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Daniel O'Brien practice?
Daniel O'Brien is based in Rolling Hills Estates, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Daniel O'Brien's NPI number?
Daniel O'Brien's National Provider Identifier (NPI) is 1023512431, registered in 2018. Specialty on record: Cardiovascular Disease (Cardiology).
Where did Daniel O'Brien go to medical school?
Daniel O'Brien attended University of Southern California Keck School of Medicine, graduating in 2018.
How many Cardiology providers in California work at ambulatory surgery centers?
444 Cardiology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Daniel O'Brien among them. The California Cardiology directory lists each one by city with credential, NPI, and center affiliations.
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