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DR. H R CHRISTOPHER O'BRIEN PHARM.D, BCPP, APH
NPI 1598885162
Pharmacist - Psychiatric in Los Angeles, CA

Active since March 29, 2007
1127 WILSHIRE BLVD STE 1415, LOS ANGELES, CA 90017(213) 924-8889(213) 924-8889 Get Directions Write a Review

NPPES record last updated: December 12, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 12, 2025, Oct 29, 2019 (2 updates tracked since 2019).

About Dr. H R Christopher O'brien Pharm.d, Bcpp, Aph NPPES

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

DR. H R CHRISTOPHER O'BRIEN PHARM.D, BCPP, APH (NPI 1598885162) is an individual psychiatric provider in Los Angeles, California, licensed in California (10158) and active in the NPI registry since March 2007.

NPPES Registry Identity

NPI1598885162
Entity TypeIndividualMale
Primary Taxonomy1835P1300X
Provider Legal NameDR. H R CHRISTOPHER O'BRIENCredential: PHARM.D, BCPP, APH
Location Address1127 WILSHIRE BLVD STE 1415Los Angeles, CA 90017-4005
Mailing Address10413 Old River School RdDowney, CA 90241-2015 · (213) 924-8889 · Fax (213) 927-3654
Phone(213) 924-8889
Fax(213) 924-8889
Sole ProprietorYes
Enumeration DateMarch 29, 2007
Last NPPES UpdateDecember 12, 20252 updates tracked since enumeration
NPPES CertifiedDecember 12, 2025
✔ NPI 1598885162 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPharmacist · PsychiatricPharmacy Service Providers
Taxonomy Code1835P1300X
License✔ Licensed in CA · 10158
Definition
A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing care of patients with psychiatric illness by assessing and monitoring patients, recognizing drug-induced problems, and recommending appropriate treatment plans.
Also ListedPharmacistTaxonomy 183500000X · License 49570 (CA)
Also ListedClinical PharmacologyTaxonomy 208U00000X · License 49570 (CA)
1127 WILSHIRE BLVD STE 1415, Los Angeles, CA 90017
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Other Names 1

Professional Name (2)Dr. Chris O'brien Pharm.d. Bcpp, Aph

Other Providers at the Same Location NPPES 4

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

SMITH & OBRIEN PSYCHIATRIC GROUP INC
Psychiatry & Neurology (Psychiatry)
1127 WILSHIRE BLVD STE 1415
LOS ANGELES, CA 90017
Los Angeles County (800) 578-1471
DR. SAMUEL PENNEY SMITH M.D.
Psychiatry & Neurology (Psychiatry)
1127 WILSHIRE BLVD STE 1415
LOS ANGELES, CA 90017
Los Angeles County (213) 482-9312
NEW HORIZONS BEHAVIORAL HEALTH
Psychologist (Clinical)
1127 WILSHIRE BLVD STE 1415
LOS ANGELES, CA 90017
Los Angeles County (310) 370-9615
DR. HIAWATHA HARRIS M.D.
Psychiatry & Neurology (Psychiatry)
1127 WILSHIRE BLVD STE 1415
LOS ANGELES, CA 90017
Los Angeles County (213) 481-0355

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is H R O'brien's NPI number?

The NPI number for H R O'brien is 1598885162. It was assigned to this individual provider in the NPPES registry on March 29, 2007. The provider is also known as Dr. Chris O'brien Pharm.D. Bcpp, Aph.

Where is H R O'brien located?

H R O'brien practices at 1127 Wilshire Blvd Ste 1415, Los Angeles, CA 90017. The listed phone number is (213) 924-8889.

What is H R O'brien's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Psychiatric, with taxonomy code 1835P1300X.

When was this NPI record last updated?

The NPPES record for H R O'brien was last updated on December 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.