Data from the NPPES registry. May not reflect recent changes — verify at nppes.cms.hhs.gov.
DANIEL O'BRIEN
Active Sole ProprietorDANIEL O'BRIEN is a Internal Medicine healthcare provider located in ROLLING HILLS ESTATES, California. NPI 1023512431 is currently active in the NPPES registry. Verify at CMS.
Internal Medicine · ROLLING HILLS ESTATES, CA
Registration Details
- NPI Number
- 1023512431
- Provider Type
- Individual
- Gender
- Male
- NPI Issued
- Mar 20, 2018 (8.2209925564758 yrs)
- Last Updated
- Sep 18, 2025
- Licenses
-
A165839 (CA)A165839 (CA)
- Sole Proprietor
- Yes
Practice Information
- Address
-
501 DEEP VALLEY DR STE 100ROLLING HILLS ESTATES, CA, 902747606Browse CA providers · Browse ZIP 90274
- Phone
- 3103033953
- Fax
- 3103037903
- Primary Specialty
-
Internal Medicine
207R00000X
- Additional Specialty
- Cardiovascular Disease
Other Internal Medicine Providers in ROLLING HILLS ESTATES, CA
| Name | Credential | NPI |
|---|---|---|
| CHRISTINE AIKO KUIDA | MD | 1518958495 |
| ANNA MELLOR | MD | 1316998776 |
| LAURENCE K GORLICK | MD | 1669411542 |
| DR. HYUNAH L POA | MD | 1568482859 |
| HIVA BASTANMEHR | M.D. | 1396751194 |
| ROBERT A. REISS | MD | 1588746150 |
Data sourced from the NPPES National Provider Identifier registry. This information is for informational purposes only and is not a substitute for verifying credentials with the appropriate licensing authority. For official verification, use the NPPES NPI Registry or the relevant state medical board.