Steve Namsinh, MD
Anesthesiology Physician · Los Alamitos, CA
Steve Namsinh, MD is an anesthesiology physician with a practice address in Los Alamitos, California, and NPI 1346413598, issued on Apr 9, 2008. Check the license (California A91331, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steve Namsinh
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- A91331 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3751 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 598-1311
- Enumerated
- Apr 9, 2008
- Record last updated
- Aug 8, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110526000498); accepts Medicare assignment
- Medical or professional school
- Chicago College Of Medicine And Surgery, 2002
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 3751 Katella Ave
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- Benjamin Cowan, MDDiagnostic Radiology Physician1760465728
Verify Steve Namsinh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A91331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Orange Coast Anesthesia IncLos Alamitos, CA
- Premiercare Anesthesia Fountain Valley IncFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steve Namsinh among 7,571 anesthesiology physician records in California
Steve Namsinh, MD is one of 7,571 anesthesiology physician records with a practice address in California. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.
- NPI issued2008 · 57% of these records are older, 39% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2002 · median 2006 among the 4,868 with a school on file
- Record last updated2011 · 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 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 anesthesiology physician records list a practice address in Los Alamitos
They are 17 of the 1,035 NPPES records with a practice address in Los Alamitos, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Los Alamitos → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Blessing Akpofure, M.D.Los Alamitos, CA 907201063496164
- Monica Choi, MDLos Alamitos, CA 907201578804506
- Brett Florie, D.O.Los Alamitos, CA 907201043445794
- Steven Gin, M.D.Los Alamitos, CA 907201548603350
- Dalia Gourgy, M.D.Los Alamitos, CA 907201093723108
- Gary Lau, M.D.Los Alamitos, CA 907201740477017
- Yanqin Lou, M.D.Los Alamitos, CA 907201134345630
- Peter Ly, M.D.Los Alamitos, CA 907201588684724
Common questions
What is Steve Namsinh, MD's NPI number?
Steve Namsinh, MD's National Provider Identifier (NPI) is 1346413598, issued on Apr 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Steve Namsinh, MD located?
The NPPES record lists a practice address at 3751 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 598-1311. Providers update this record themselves, so call before visiting.
How can I verify Steve Namsinh, MD's license?
NPPES lists California license number A91331, 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.
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.