Dr. Thoi H. Lien, M.D.
Family Medicine (Family Medicine Physician)
8054 Garvey Ave Ste 201
Rosemead, CA 91770
Who else practices at this address →
Los Angeles County includes primary care (7% of residents) and mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Hahnemann University College of Medicine (1998)
- Years since graduation
- 28
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 740
Licensed in California since 2001, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1998Medical school: Hahnemann University College of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Family Medicine Physician primary
CA license A75628 (first issued 2001; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Garfield Medical Center Monterey PArk, CA
- San Gabriel Valley Medical Center San Gabriel, CA
- Alhambra Hospital Medical Center Alhambra, CA
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 740
- Services billed
- 4,863
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 20-29 minutes | 1,752 | 510 |
| Established patient office or other outpatient visit, 10-19 minutes | 560 | 282 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 520 | 173 |
| Established patient office or other outpatient visit, 30-39 minutes | 373 | 323 |
| Insertion of needle into vein (3 years or older) | 316 | 296 |
| Administration of influenza virus vaccine | 312 | 310 |
| Influenza vaccine split virus, preservative free | 291 | 289 |
| Insertion of needle into vein for collection of blood sample | 276 | 270 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 188 | 65 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 181 | 33 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Atorvastatin Calcium Other prescribers in Rosemead, CA | 2,314 |
| Levocetirizine Dihydrochloride Other prescribers in Rosemead, CA | 1,503 |
| Losartan Potassium Other prescribers in Rosemead, CA | 1,373 |
| Celecoxib Other prescribers in Rosemead, CA | 1,287 |
| Amlodipine Besylate Other prescribers in Rosemead, CA | 1,262 |
| Metformin Hcl Other prescribers in Rosemead, CA | 1,213 |
| Losartan-Hydrochlorothiazide (losartan/hydrochlorothiazide) Other prescribers in Rosemead, CA | 1,107 |
| Alendronate Sodium Other prescribers in Rosemead, CA | 1,063 |
| Pantoprazole Sodium Other prescribers in Rosemead, CA | 939 |
| Metoprolol Succinate Other prescribers in Rosemead, CA | 937 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $26.82 in total to this clinician.
| Bayer HealthCare Pharmaceuticals Inc. | $26.82 |
|---|
| Food and Beverage | $26.82 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.