NPPES file of Aug 9, 2026

Ellen Phamduong, M.D.

Anesthesiology Physician · Los Angeles, CA

Ellen Phamduong, M.D. is an anesthesiology physician with a practice address in Los Angeles, California, and NPI 1033571195, issued on Mar 27, 2016. Check the license (California A138991, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1033571195
Name
Ellen Phamduong
Credential
M.D.
Primary taxonomy
Anesthesiology Physician 207L00000X
License number
A138991 CA
Self-reported in NPPES; status is on the state search
Practice location
2051 Marengo St # C4E100, Los Angeles, CA 90033
Phone
(323) 409-7748
Enumerated
Mar 27, 2016
Record last updated
Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20191111002495); accepts Medicare assignment
Medical or professional school
Saint Louis University School Of Medicine, 2014
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 2051 Marengo St # C4E100

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Chidozie Chimezie, MDAnesthesiology Physician1699279729
  2. Elizabeth Hong, M.D.Anesthesiology Physician1497118871
  3. Alexis MontoyaStudent in an Organized Health Care Education/Training Program1841050556
  4. Shikha Nepal, M.D.Student in an Organized Health Care Education/Training Program1851748750
  5. Jay Roby, M.D.Anesthesiology Physician1144531773
  6. Khoa Truong-N, M.D.Anesthesiology Physician1063874345

Verify Ellen Phamduong in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A138991
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupDowney, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ellen Phamduong among 7,571 anesthesiology physician records in California

Ellen Phamduong, 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
  • Graduated2014 · median 2006 among the 4,868 with a school on file
  • Record last updated2021 · 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.

The 8 anesthesiology physician records with the nearest ZIP codes

  1. Ahmed Darwish, MDLos Angeles, CA 900331053380055
  2. Omar Durra, MDLos Angeles, CA 900331003802869
  3. Sherman Elspas, M.D.Los Angeles, CA 900331336196138
  4. Gligor Gucev, M.D.Los Angeles, CA 900331417904244
  5. Samuel Loh, M.D.Los Angeles, CA 900331922060680
  6. William Loskota, PH.D., M.D.Los Angeles, CA 900331356398077
  7. Cicero Malilay, M.D.Los Angeles, CA 900331649232307
  8. Robert Naruse, MDLos Angeles, CA 900331730174913

Common questions

What is Ellen Phamduong, M.D.'s NPI number?

Ellen Phamduong, M.D.'s National Provider Identifier (NPI) is 1033571195, issued on Mar 27, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Ellen Phamduong, M.D. located?

The NPPES record lists a practice address at 2051 Marengo St # C4E100, Los Angeles, CA, 90033. Phone: (323) 409-7748. Providers update this record themselves, so call before visiting.

How can I verify Ellen Phamduong, M.D.'s license?

NPPES lists California license number A138991, 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.