Leigh Echols Nguyen, M.D.
Internal Medicine Physician · Los Angeles, CA
Leigh Echols Nguyen, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1720009095, issued on Jul 22, 2006. Check the license (California C185788, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leigh Echols Nguyen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C185788 CA
M1266 TX
Self-reported in NPPES; status is on the state search - Practice location
- 5971 Venice Blvd, Los Angeles, CA 90034
- Phone
- (323) 857-2000
- Enumerated
- Jul 22, 2006
- Record last updated
- May 7, 2024
- Medicaid IDs
- 173890802 TX
173890801 TX - Medicare enrollment
- Enrolled (PECOS I20240214003486); 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 5971 Venice Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leigh Echols Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C185788Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,455 Medicare Part D claims for 418 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 31 claims were for opioids.
Most prescribed
- Atorvastatin Calcium131 claims
- Amlodipine Besylate84 claims
- Losartan Potassium68 claims
- Metformin Hcl47 claims
- Levothyroxine Sodium45 claims
- Albuterol Sulfate Hfa38 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
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leigh Echols Nguyen among 17,696 internal medicine physician records in California
Leigh Echols Nguyen, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2001 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Lewis Guiss Jr., MDLos Angeles, CA 900341629145636
- David Guzman, M.D.Los Angeles, CA 900341275521494
- Mark Katz, MDLos Angeles, CA 900341487725370
- Eric Lee, MDLos Angeles, CA 900341275552556
Common questions
What is Leigh Echols Nguyen, M.D.'s NPI number?
Leigh Echols Nguyen, M.D.'s National Provider Identifier (NPI) is 1720009095, issued on Jul 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leigh Echols Nguyen, M.D. located?
The NPPES record lists a practice address at 5971 Venice Blvd, Los Angeles, CA, 90034. Phone: (323) 857-2000. Providers update this record themselves, so call before visiting.
How can I verify Leigh Echols Nguyen, M.D.'s license?
NPPES lists California license number C185788, 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 Leigh Echols Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Leigh Echols Nguyen, M.D. had 1,455 Medicare Part D claims for 418 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.