DANIEL O'BRIEN
NPI 1023512431
Internal Medicine - Cardiovascular Disease in Rolling Hills Estates, CA

Active since March 20, 2018PECOS EnrolledAccepts Medicare Assignment
501 DEEP VALLEY DR STE 100, ROLLING HILLS ESTATES, CA 90274(310) 303-3953(310) 303-7903 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Mar 25, 2026, Sep 18, 2025, Jul 19, 2022 and 4 more (7 updates tracked since 2018).

About Daniel O'brien NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DANIEL O'BRIEN (NPI 1023512431) is an individual cardiovascular disease provider in Rolling Hills Estates, California, licensed in California (A165839) and active in the NPI registry since March 2018. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Southern California Keck School Of Medicine (2018).

NPPES Registry Identity

NPI1023512431
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDANIEL O'BRIEN
Location Address501 DEEP VALLEY DR STE 100Rolling Hills Estates, CA 90274-7606
Mailing Address5767 W Century Blvd Ste 400Los Angeles, CA 90045-5631
Fax(310) 303-7903
Sole ProprietorYes
Medical School CMSUniversity Of Southern California Keck School Of MedicineGraduated 2018
Enumeration DateMarch 20, 2018
Last NPPES UpdateMarch 25, 20267 updates tracked since enumeration
NPPES CertifiedMarch 25, 2026
NPI 1023512431 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License Licensed in CA · A165839
Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

501 DEEP VALLEY DR STE 100, Rolling Hills Estates, CA 90274

Secondary Practice Locations 2

Location 1757 Westwood PlzLos Angeles, CA 90095-8358 · Phone (310) 825-9111
Location 2200 Ucla Medical Plz Ste 420Los Angeles, CA 90095-8358 · Phone (310) 206-6232

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Daniel O'brien is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9830598010
PECOS Enrollment IDI20210519002632
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90274 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Radiology (Diagnostic Radiology)
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Dermatology
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Internal Medicine
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Family Medicine
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Radiology (Diagnostic Radiology)
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274
Internal Medicine
501 DEEP VALLEY DR STE 100
ROLLING HILLS ESTATES, CA 90274

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1023512431, enumerated as an "individual" on March 20, 2018.

The provider is located at 501 DEEP VALLEY DR STE 100 ROLLING HILLS ESTATES, CA 90274 and the phone number is (310) 303-3953.

Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.