Arnold Ostrow, M.D.
Specialist · Los Alamitos, CA
Arnold Ostrow, M.D. is a specialist with a practice address in Los Alamitos, California, and NPI 1932147824, issued on Jun 3, 2006. Check the license (California G16243, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Arnold Ostrow
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G16243 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3771 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 430-7533
- Enumerated
- Jun 3, 2006
- Record last updated
- Apr 16, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (562) 431-3479
- Medicaid ID
- 00G162430 CA
- Entity
- Type 1 · individual
Also registered at 3771 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stuart Green, M.D.Specialist1881702504
- Raymond Klug, M.D.Orthopaedic Surgery Physician1295829083
- Kathleen Macleod, M.D.Infectious Disease Physician1821066077
Verify Arnold Ostrow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G16243Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average specialist in 2024
36 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
18 specialist records list a practice address in Los Alamitos
They are 18 of the 1,035 NPPES records with a practice address in Los Alamitos, and 5,749 specialist records in California.
All 18 in Los Alamitos → All 5,749 in California → Every provider in Los Alamitos →
Other specialist records in California
- Fatemeh Abbasi, PTVan Nuys, CA1558496760
- Erlinda Abcede, M.D.Cudahy, CA1831228675
- Maher Abdallah, M.D.Palm Springs, CA1205988011
- Farinaz AbdiSan Marcos, CA1063153963
- Mai Abe, LESanta Monica, CA1609405158
- Hamid Abedi, HEARING AID SPECIALISan Diego, CA1659410744
- Jonas AbellaSan Francisco, CA1679760938
- Shreedhar Abhyankar, M.D.Indio, CA1861530669
- Elaine AbichRiverside, CA1780458927
- Mussarat Abidi, MDLadera Ranch, CA1053307769
Common questions
What is Arnold Ostrow, M.D.'s NPI number?
Arnold Ostrow, M.D.'s National Provider Identifier (NPI) is 1932147824, issued on Jun 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Arnold Ostrow, M.D. located?
The NPPES record lists a practice address at 3771 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 430-7533. Providers update this record themselves, so call before visiting.
How can I verify Arnold Ostrow, M.D.'s license?
NPPES lists California license number G16243, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Arnold Ostrow, M.D. prescribe under Medicare Part D?
In 2024, Arnold Ostrow, M.D. had 36 Medicare Part D claims; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.