Louis Hsi-Tien Liu, M.D.
Family Medicine Physician · Tualatin, OR
Louis Hsi-Tien Liu, M.D. is a family medicine physician with a practice address in Tualatin, Oregon, and NPI 1336259274, issued on Aug 30, 2006. Check the license (Oregon MD22905, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Louis Hsi-Tien Liu
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD22905 OR
Self-reported in NPPES; status is on the state search - Practice location
- 19185 SW 90TH Ave, Tualatin, OR 97062
- Phone
- (503) 885-7300
- Enumerated
- Aug 30, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,847 in Oregon → Look up another NPI →
Also registered at 19185 SW 90TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Rick Baldwin, RPHPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1962945329
Verify Louis Hsi-Tien Liu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD22905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average family medicine physician in 2024
3,423 Medicare Part D claims for 793 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 78 claims were for opioids.
Most prescribed
- Atorvastatin Calcium251 claims
- Lisinopril146 claims
- Rosuvastatin Calcium121 claims
- Amlodipine Besylate114 claims
- Simvastatin111 claims
- Levothyroxine Sodium108 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.
Louis Hsi-Tien Liu among 2,847 family medicine physician records in Oregon
Louis Hsi-Tien Liu, M.D. is one of 2,847 family medicine physician records with a practice address in Oregon. 75% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Tualatin
They are 20 of the 863 NPPES records with a practice address in Tualatin, and 2,847 family medicine physician records in Oregon.
All 2,847 in Oregon → Every provider in Tualatin → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Yanina Benikova, M.D.Tualatin, OR 970621538115597
- Jonathan Berger, M.D.Tualatin, OR 970621326017997
- Debra Davis, M.D.Tualatin, OR 970621811081300
- Claire De Leon, MDTualatin, OR 970621669458956
- Bruce Holmes, MDTualatin, OR 970621790754273
- Kathleen Laughlin, M.DTualatin, OR 970621346282720
- Jenny Nordeen, M.D.Tualatin, OR 970621871789024
- Warren Okuns, M.D.Tualatin, OR 970621134385461
Common questions
What is Louis Hsi-Tien Liu, M.D.'s NPI number?
Louis Hsi-Tien Liu, M.D.'s National Provider Identifier (NPI) is 1336259274, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Louis Hsi-Tien Liu, M.D. located?
The NPPES record lists a practice address at 19185 SW 90TH Ave, Tualatin, OR, 97062. Phone: (503) 885-7300. Providers update this record themselves, so call before visiting.
How can I verify Louis Hsi-Tien Liu, M.D.'s license?
NPPES lists Oregon license number MD22905, 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 Louis Hsi-Tien Liu, M.D. prescribe under Medicare Part D?
In 2024, Louis Hsi-Tien Liu, M.D. had 3,423 Medicare Part D claims for 793 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.