Lac Nguyen, MD
Internal Medicine Physician · Portland, OR
Lac Nguyen, MD is an internal medicine physician with a practice address in Portland, Oregon, and NPI 1558007161, issued on May 6, 2022. Check the license (Oregon MD224865, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Lac Nguyen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD224865 OR
Self-reported in NPPES; status is on the state search - Practice location
- 10201 SE Main St Ste 10B, Portland, OR 97216
- Phone
- (503) 255-7550
- Enumerated
- May 6, 2022
- Record last updated
- Aug 18, 2025
- Fax
- (503) 255-0884
- Medicare enrollment
- Enrolled (PECOS I20250815004262); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Verify Lac Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD224865Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
169 Medicare Part D claims for 47 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of 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
- Portland Adventist Medical CenterPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lac Nguyen among 2,116 internal medicine physician records in Oregon
Lac Nguyen, MD is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 93% of them.
- NPI issued2022 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2018 · median 2008 among the 1,232 with a school on file
- Record last updated2025 · 58% 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
889 internal medicine physician records list a practice address in Portland
They are 889 of the 42,088 NPPES records with a practice address in Portland, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Portland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Peter Carty, MDPortland, OR 972161326004250
- Ellen Duplain, MDPortland, OR 972161225066301
- Elizabeth Ehrlich, MDPortland, OR 972161609069681
- Craig Foss, MDPortland, OR 972161720044654
- Jill Hansen, MDPortland, OR 972161518050459
- Philip McDaniel, M.D.Portland, OR 972161851327753
- Richard Mishler, MDPortland, OR 972161609832161
- Marc Moroye, MDPortland, OR 972161285698514
Common questions
What is Lac Nguyen, MD's NPI number?
Lac Nguyen, MD's National Provider Identifier (NPI) is 1558007161, issued on May 6, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Lac Nguyen, MD located?
The NPPES record lists a practice address at 10201 SE Main St Ste 10B, Portland, OR, 97216. Phone: (503) 255-7550. Providers update this record themselves, so call before visiting.
How can I verify Lac Nguyen, MD's license?
NPPES lists Oregon license number MD224865, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lac Nguyen, MD prescribe under Medicare Part D?
In 2024, Lac Nguyen, MD had 169 Medicare Part D claims for 47 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.