DR. LOI LAM M.D.
Prescription History 1861692964
Internal Medicine in Vallejo, CA
What does Dr. Lam prescribe?
In 2024, Dr. Lam wrote 250 Medicare prescriptions for 13 medications. The most prescribed was Metoprolol Succinate, with 34 prescriptions for 19 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Lam prescribes.
Medications 13 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other California prescribers.
What it is used for
This medication is a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with California prescribers
Dr. Lam wrote 34 prescriptions for Metoprolol Succinate, about 39% as often as the typical California prescriber of it (86). Medicare paid $10.08 per fill, versus $14.23 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Lam wrote 30 prescriptions for Amlodipine Besylate, about 21% as often as the typical California prescriber of it (141). Medicare paid $10.21 per fill, versus $7.08 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Furosemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with California prescribers
Dr. Lam wrote 30 prescriptions for Furosemide, about half as often as the typical California prescriber of it (64). Medicare paid $10.50 per fill, versus $6.39 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with California prescribers
Dr. Lam wrote 28 prescriptions for Pantoprazole Sodium, about half as often as the typical California prescriber of it (65). Medicare paid $12.97 per fill, versus $13.87 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with California prescribers
Dr. Lam wrote 17 prescriptions for Famotidine, about 32% as often as the typical California prescriber of it (54). Medicare paid $10.40 per fill, versus $12.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Atorvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood.
Compared with California prescribers
Dr. Lam wrote 15 prescriptions for Atorvastatin Calcium, about 7% as often as the typical California prescriber of it (202). Medicare paid $13.30 per fill, versus $10.47 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Clopidogrel is used to prevent heart attacks and strokes in persons with heart disease (recent heart attack), recent stroke, or blood circulation disease (peripheral vascular disease).
Compared with California prescribers
Dr. Lam wrote 15 prescriptions for Clopidogrel, about 31% as often as the typical California prescriber of it (48). Medicare paid $18.13 per fill, versus $12.42 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Lam wrote 15 prescriptions for Hydralazine Hcl, about 35% as often as the typical California prescriber of it (43). Medicare paid $24.40 per fill, versus $14.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a wide variety of bacterial infections, including those that cause acne.
Compared with California prescribers
Dr. Lam wrote 14 prescriptions for Doxycycline Monohydrate, about half as often as the typical California prescriber of it (27). Medicare paid $7.14 per fill, versus $15.48 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Lisinopril is used to treat high blood pressure.
Compared with California prescribers
Dr. Lam wrote 14 prescriptions for Lisinopril, about 14% as often as the typical California prescriber of it (98). Medicare paid $10.88 per fill, versus $8.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Lam wrote 14 prescriptions for Metoprolol Tartrate, about 25% as often as the typical California prescriber of it (57). Medicare paid $12.02 per fill, versus $7.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with California prescribers
Dr. Lam wrote 13 prescriptions for Losartan Potassium, about 11% as often as the typical California prescriber of it (121). Medicare paid $11.00 per fill, versus $10.35 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with California prescribers
Dr. Lam wrote 11 prescriptions for Tamsulosin Hcl, about 13% as often as the typical California prescriber of it (84). Medicare paid $15.04 per fill, versus $15.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Lam’s prescriptions
What does Dr. Lam prescribe most?
In 2024 Medicare Part D data, Dr. Lam's most prescribed medications were Metoprolol Succinate (34), Amlodipine Besylate (30) and Furosemide (30).
How does Dr. Lam's prescribing compare with other California prescribers?
Of the 13 medications with a state comparison, Dr. Lam prescribes 13 less often than the typical California prescriber. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Lam prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the California prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
