IndividualActive
Barbara Holshouser, PHD
NPI 1659545531 · Research Study Specialist · Loma Linda, CA
Barbara Holshouser, PHD is a Research Study Specialist provider in Loma Linda, CA (NPI 1659545531).
Provider details
- NPI number
- 1659545531
- Entity type
- Individual
- Primary specialty
- Research Study SpecialistOther Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
83% 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.
Practice location
11234 Anderson St
Mri B623
Loma Linda, CA 92354-2804
Phone: (909) 558-4800
Fax: (909) 558-4149
Street-level locationGet directions
Mailing address
12282 Singing Wood Dr
Santa Ana, CA 92705-3326
Registry dates
- Enumerated
- 2008-04-22
- Last updated
- 2008-04-22
Frequently asked questions
- What is Barbara Holshouser's NPI number?
- Barbara Holshouser's National Provider Identifier (NPI) is 1659545531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Barbara Holshouser's specialty?
- Barbara Holshouser is listed in the NPPES registry with a primary specialty of Research Study Specialist (Other Service Providers).
- Where is Barbara Holshouser located?
- Barbara Holshouser's practice location on file with NPPES is 11234 Anderson St, Loma Linda, CA 92354-2804.
- What is Barbara Holshouser's phone number?
- The practice phone number listed in the NPPES registry for Barbara Holshouser is (909) 558-4800.
- Is Barbara Holshouser's NPI active?
- Yes — Barbara Holshouser's NPI (1659545531) is active in the NPPES registry as of the last update on 2008-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.