Arnold Ostrow, M.D.
NPI 1932147824 · Specialist · Los Alamitos, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arnold Ostrow, M.D. is a Specialist provider in Los Alamitos, CA (NPI 1932147824).
Provider details
- NPI number
- 1932147824
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G16243 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-03
- Last updated
- 2010-04-16
Frequently asked questions
- What is Arnold Ostrow's NPI number?
- Arnold Ostrow's National Provider Identifier (NPI) is 1932147824, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arnold Ostrow's specialty?
- Arnold Ostrow is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Arnold Ostrow located?
- Arnold Ostrow's practice location on file with NPPES is 3771 Katella Ave, Los Alamitos, CA 90720-3108.
- What is Arnold Ostrow's phone number?
- The practice phone number listed in the NPPES registry for Arnold Ostrow is (562) 430-7533.
- Does Arnold Ostrow accept Medicare?
- Arnold Ostrow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arnold Ostrow's NPI active?
- Yes — Arnold Ostrow's NPI (1932147824) is active in the NPPES registry as of the last update on 2010-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.