Tamara Z. Maher, D.O
Adult Medicine Physician · Los Alamitos, CA
Tamara Z. Maher, D.O is an adult medicine physician with a practice address in Los Alamitos, California, and NPI 1598750473, issued on Sep 15, 2005. Check the license (California 20A6084, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tamara Z. Maher
- Credential
- D.O
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- 20A6084 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10861 Cherry St, Los Alamitos, CA 90720
- Phone
- (562) 431-9200
- Enumerated
- Sep 15, 2005
- Record last updated
- Dec 2, 2025
- Fax
- (562) 431-9232
- Medicare enrollment
- Enrolled (PECOS I20120524000171); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 1990
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 10861 Cherry St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Tamara Z. Maher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6084Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average adult medicine physician in 2024
7,152 Medicare Part D claims for 456 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 115 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium563 claims
- Amlodipine Besylate269 claims
- Losartan Potassium261 claims
- Levothyroxine Sodium241 claims
- Atorvastatin Calcium220 claims
- Ezetimibe169 claims
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.
Industry payments in 2024: $1,034.46
48 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 664 providers of this specialty with any payment received $1,405.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Tamara Z. Maher among 386 adult medicine physician records in California
Tamara Z. Maher, D.O is one of 386 adult medicine physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 97% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 48% of these records are
- Graduated1990 · median 2005 among the 187 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Los Alamitos → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Tinh Vuong, D.OHarbor City, CA 907101750569885
- Issa Botros, MDSan Pedro, CA 907321124227772
- Gonzalo Castaneda, MDBellflower, CA 907061376040709
- Yogina Desai, M.D.Carson, CA 907451790043545
- Rehana Hethumuni, D.O.Montebello, CA 906401518054477
- David LauLong Beach, CA 908041205281870
- Eing-Min Chang, M.D.Long Beach, CA 908061447356621
- Mark Dressner, M.D.Long Beach, CA 908061306942073
Common questions
What is Tamara Z. Maher, D.O's NPI number?
Tamara Z. Maher, D.O's National Provider Identifier (NPI) is 1598750473, issued on Sep 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Tamara Z. Maher, D.O located?
The NPPES record lists a practice address at 10861 Cherry St, Los Alamitos, CA, 90720. Phone: (562) 431-9200. Providers update this record themselves, so call before visiting.
How can I verify Tamara Z. Maher, D.O's license?
NPPES lists California license number 20A6084, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Tamara Z. Maher, D.O prescribe under Medicare Part D?
In 2024, Tamara Z. Maher, D.O had 7,152 Medicare Part D claims for 456 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.