H R O'Brien, PHARM.D, BCPP, APH
NPI 1598885162 · Psychiatric Pharmacist · Los Angeles, CA
H R O'Brien, PHARM.D, BCPP, APH is a Psychiatric Pharmacist provider in Los Angeles, CA (NPI 1598885162).
Provider details
- NPI number
- 1598885162
- Entity type
- Individual
- Primary specialty
- Psychiatric PharmacistPharmacy Service Providers
- Credential
- PHARM.D, BCPP, APH
- Sex
- Male
- Sole proprietor
- Yes
- License
- 49570 (CA)
Specialties & taxonomies
Pharmacy Service Providers
Pharmacy Service Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Olanzapine | 326 | 21 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 318 | 25 |
| Quetiapine Fumarate | 308 | 23 |
| Risperidone | 252 | 20 |
| Trazodone Hcl | 241 | 22 |
| Clonazepam | 219 | 22 |
| Benztropine Mesylate | 193 | 23 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-29
- Last updated
- 2025-12-12
- Certified
- 2025-12-12
Frequently asked questions
- What is H R O'Brien's NPI number?
- H R O'Brien's National Provider Identifier (NPI) is 1598885162, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is H R O'Brien's specialty?
- H R O'Brien is listed in the NPPES registry with a primary specialty of Psychiatric Pharmacist (Pharmacy Service Providers).
- Where is H R O'Brien located?
- H R O'Brien's practice location on file with NPPES is 1127 Wilshire Blvd Ste 1415, Los Angeles, CA 90017-4005.
- What is H R O'Brien's phone number?
- The practice phone number listed in the NPPES registry for H R O'Brien is (213) 924-8889.
- Is H R O'Brien's NPI active?
- Yes — H R O'Brien's NPI (1598885162) is active in the NPPES registry as of the last update on 2025-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.