Stephen Quach, M.D
Anesthesiology Physician · Los Angeles, CA
Stephen Quach, M.D is an anesthesiology physician with a practice address in Los Angeles, California, and NPI 1558724427, issued on Mar 30, 2016. Check the license (California 154444, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Quach
- Credential
- M.D
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 154444 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2051 Marengo St, Los Angeles, CA 90033
- Phone
- (323) 409-1000
- Enumerated
- Mar 30, 2016
- Record last updated
- Apr 21, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200714001955); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Denver, 2016
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 2051 Marengo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Helen AbolarinPsychiatric/Mental Health Nurse Practitioner1407551740
- Nawal AbouzahrStudent in an Organized Health Care Education/Training Program1881054104
- Shelby AdlerPsychiatry Physician1407432263
- Shalleymar AgitoRegistered Respiratory Therapist1649850694
- Adolfo AguilarCritical Care Registered Respiratory Therapist1053836999
- Ashley Allen, MDEmergency Medicine Physician1053751875
Verify Stephen Quach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 154444Check 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
- Professional Anesthesia Associates PCSan Pedro, CA
- South Bay Anesthesia Medical Group IncTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Quach among 7,571 anesthesiology physician records in California
Stephen Quach, M.D 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 2016, is newer than 80% of them.
- NPI issued2016 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2016 · median 2006 among the 4,868 with a school on file
- Record last updated2020 · 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).
Anesthesiology Physician providers in California
There are 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Los Angeles → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Ahmed Darwish, MDLos Angeles, CA 900331053380055
- Omar Durra, MDLos Angeles, CA 900331003802869
- Sherman Elspas, M.D.Los Angeles, CA 900331336196138
- Gligor Gucev, M.D.Los Angeles, CA 900331417904244
- Samuel Loh, M.D.Los Angeles, CA 900331922060680
- William Loskota, PH.D., M.D.Los Angeles, CA 900331356398077
- Cicero Malilay, M.D.Los Angeles, CA 900331649232307
- Robert Naruse, MDLos Angeles, CA 900331730174913
Common questions
What is Stephen Quach, M.D's NPI number?
Stephen Quach, M.D's National Provider Identifier (NPI) is 1558724427, issued on Mar 30, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Quach, M.D located?
The NPPES record lists a practice address at 2051 Marengo St, Los Angeles, CA, 90033. Phone: (323) 409-1000. Providers update this record themselves, so call before visiting.
How can I verify Stephen Quach, M.D's license?
NPPES lists California license number 154444, 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.