Aaron Richler, M.D.
Internal Medicine Physician · Los Alamitos, CA
Aaron Richler, M.D. is an internal medicine physician with a practice address in Los Alamitos, California, and NPI 1619350337, issued on Jun 30, 2015. Check the license (California A161190, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aaron Richler
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A161190 CA
289590 NY
Self-reported in NPPES; status is on the state search - Practice location
- 10941 Bloomfield St, Los Alamitos, CA 90720
- Phone
- (562) 596-1667
- Enumerated
- Jun 30, 2015
- Record last updated
- Jul 2, 2026
- Fax
- (562) 598-6867
- Medicare enrollment
- Enrolled (PECOS I20190730003391); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10941 Bloomfield St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hossein Eftekhari, MDInternal Medicine Physician1265694962
- Kathleen Fulmer, ARNPFamily Nurse Practitioner1366519985
- Michael Lauermann, M.D.Specialist1265522684
- Tanzina Nasreen, M.D.Nephrology Physician1649454638
- Jack Rubin, M.D.Internal Medicine Physician1700882479
Verify Aaron Richler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A161190Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,038 Medicare Part D claims for 153 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 41 claims were for opioids.
Most prescribed
- Atorvastatin Calcium143 claims
- Tamsulosin Hcl75 claims
- Furosemide70 claims
- Amlodipine Besylate69 claims
- Metoprolol Tartrate58 claims
- Losartan Potassium52 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.
Bills Medicare through one group practice
- Medicine And Nephrology AssociatesLos Alamitos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Richler among 17,696 internal medicine physician records in California
Aaron Richler, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 76% of them.
- NPI issued2015 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
40 internal medicine physician records list a practice address in Los Alamitos
They are 40 of the 1,035 NPPES records with a practice address in Los Alamitos, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Alamitos → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Barry Allswang, MDLos Alamitos, CA 907201720016397
- Carlos ArguedasLos Alamitos, CA 907201023075579
- Vichai Bhoopat, M.D.Los Alamitos, CA 907201841211497
- Winston Chung, MDLos Alamitos, CA 907201851322085
- Gerald Cohen, MDLos Alamitos, CA 907201306877253
- Heena Contractor, M.D.Los Alamitos, CA 907201518954973
- William Harrell, MDLos Alamitos, CA 907201083673685
- Taolin Jen, M.D.Rossmoor, CA 907201457384828
Common questions
What is Aaron Richler, M.D.'s NPI number?
Aaron Richler, M.D.'s National Provider Identifier (NPI) is 1619350337, issued on Jun 30, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Richler, M.D. located?
The NPPES record lists a practice address at 10941 Bloomfield St, Los Alamitos, CA, 90720. Phone: (562) 596-1667. Providers update this record themselves, so call before visiting.
How can I verify Aaron Richler, M.D.'s license?
NPPES lists California license number A161190, 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 Aaron Richler, M.D. prescribe under Medicare Part D?
In 2024, Aaron Richler, M.D. had 2,038 Medicare Part D claims for 153 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.