PATRICIA S. TSAI MD
Prescription History 1053470708
Ophthalmology in Woodland Hills, CA
What does Dr. Tsai prescribe?
In 2024, Dr. Tsai wrote 2,868 Medicare prescriptions for 23 medications. The most prescribed was Latanoprost, with 623 prescriptions for 178 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. Tsai prescribes.
Medications 23 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
Latanoprost is used to treat high pressure inside the eye due to glaucoma (open angle type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 623 prescriptions for Latanoprost, about 3.9 times as often as the typical California prescriber of it (159). Medicare paid $12.59 per fill, versus $12.02 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 product contains two drugs used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 420 prescriptions for Dorzolamide-Timolol, about 3.4 times as often as the typical California prescriber of it (122). Medicare paid $20.11 per fill, versus $20.06 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 certain eye conditions due to inflammation or injury.
Compared with California prescribers
Dr. Tsai wrote 363 prescriptions for Prednisolone Acetate, about 2.3 times as often as the typical California prescriber of it (155). Medicare paid $47.48 per fill, versus $42.12 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 high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 355 prescriptions for Timolol Maleate, about 3.8 times as often as the typical California prescriber of it (93). Medicare paid $17.24 per fill, versus $16.60 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 open-angle glaucoma or high fluid pressure in the eye.
Compared with California prescribers
Dr. Tsai wrote 241 prescriptions for Brimonidine Tartrate, about 2.7 times as often as the typical California prescriber of it (89). Medicare paid $14.86 per fill, versus $42.08 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
This medication is a quinolone antibiotic used for eye infections.
Compared with California prescribers
Dr. Tsai wrote 198 prescriptions for Moxifloxacin, about 2 times as often as the typical California prescriber of it (101). Medicare paid $12.41 per fill, versus $20.90 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
Cyclosporine eye drops are used to treat a certain type of dry eyes.
Compared with California prescribers
Dr. Tsai wrote 115 prescriptions for Cyclosporine, about 1.8 times as often as the typical California prescriber of it (64). Medicare paid $123.86 per fill, versus $344.54 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
Acyclovir is used to treat infections caused by certain types of viruses.
Compared with California prescribers
Dr. Tsai wrote 99 prescriptions for Acyclovir, about 3.9 times as often as the typical California prescriber of it (25). Medicare paid $25.89 per fill, versus $18.27 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 certain eye conditions due to inflammation or injury.
Compared with California prescribers
Dr. Tsai wrote 87 prescriptions for Fluorometholone, about 2.2 times as often as the typical California prescriber of it (40). Medicare paid $197.19 per fill, versus $97.78 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. Tsai wrote 57 prescriptions for Doxycycline Monohydrate, about 2.1 times as often as the typical California prescriber of it (27). Medicare paid $33.70 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
This medication is used to treat conditions involving swelling (inflammation) of the eyes and to treat or prevent bacterial eye infections.
Compared with California prescribers
Dr. Tsai wrote 53 prescriptions for Neomycin-Polymyxin-Dexameth, about 1.3 times as often as the typical California prescriber of it (41). Medicare paid $15.46 per fill, versus $11.42 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
Dorzolamide is used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 49 prescriptions for Dorzolamide Hcl, about as often as the typical California prescriber of it (51). Medicare paid $18.38 per fill, versus $20.46 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 temporarily relieve itching eyes caused by seasonal allergies.
Compared with California prescribers
Dr. Tsai wrote 41 prescriptions for Ketorolac Tromethamine, about half as often as the typical California prescriber of it (95). Medicare paid $24.43 per fill, versus $18.21 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
Bimatoprost is used to treat high pressure inside the eye due to glaucoma (open-angle type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 20 prescriptions for Bimatoprost, about half as often as the typical California prescriber of it (43). Medicare paid $57.22 per fill, versus $103.08 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
Methotrexate is used to treat certain types of cancer (such as acute lymphoblastic leukemia, non-Hodgkin's lymphoma), severe psoriasis that has not responded to other treatments, or rheumatoid arthritis.
Compared with California prescribers
Dr. Tsai wrote 20 prescriptions for Methotrexate, about 21% as often as the typical California prescriber of it (95). Medicare paid $17.48 per fill, versus $24.82 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
Mycophenolate is used in combination with other medications to keep your body from attacking and rejecting your transplanted organ (such as kidney, liver, heart).
Compared with California prescribers
Dr. Tsai wrote 20 prescriptions for Mycophenolate Mofetil, about 70% as often as the typical California prescriber of it (29). Medicare paid $194.80 per fill, versus $132.62 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 bacterial infections (such as blepharitis, conjunctivitis) of the eye.
Compared with California prescribers
Dr. Tsai wrote 20 prescriptions for Polymyxin B Sul-Trimethoprim, about half as often as the typical California prescriber of it (41). Medicare paid $12.39 per fill, versus $10.46 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 certain eye infections (such as conjunctivitis).
Compared with California prescribers
Dr. Tsai wrote 19 prescriptions for Erythromycin, about 38% as often as the typical California prescriber of it (49). Medicare paid $18.64 per fill, versus $13.38 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 alone or with other medications to treat high pressure inside the eye due to glaucoma (open-angle type) or other eye diseases (such as ocular hypertension).
Compared with California prescribers
Dr. Tsai wrote 18 prescriptions for Levobunolol Hcl, about half as often as the typical California prescriber of it (34). Medicare paid $57.02 per fill, versus $39.53 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 vaccine is used to keep up protection (immunity) against diphtheria, tetanus (lockjaw) and pertussis (whooping cough) in children and adults who have been vaccinated for these diseases in the past.
Compared with California prescribers
Dr. Tsai wrote 15 prescriptions for Adacel Tdap, about 71% as often as the typical California prescriber of it (21). Medicare paid $51.00 per fill, versus $52.46 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 swelling and pain after eye surgery.
Compared with California prescribers
Dr. Tsai wrote 12 prescriptions for Difluprednate, about 31% as often as the typical California prescriber of it (39). Medicare paid $353.88 per fill, versus $101.83 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
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with California prescribers
Dr. Tsai wrote 12 prescriptions for Prednisone, about 30% as often as the typical California prescriber of it (40). Medicare paid $12.13 per fill, versus $5.64 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 minor skin infections (such as impetigo, folliculitis) or minor infections related to some skin conditions (such as eczema, psoriasis, minor burns/cuts/wounds).
Compared with California prescribers
Dr. Tsai wrote 11 prescriptions for Gentamicin Sulfate, about 39% as often as the typical California prescriber of it (28). Medicare paid $21.12 per fill, versus $33.73 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. Tsai’s prescriptions
What does Dr. Tsai prescribe most?
In 2024 Medicare Part D data, Dr. Tsai's most prescribed medications were Latanoprost (623), Dorzolamide-Timolol (420) and Prednisolone Acetate (363).
How does Dr. Tsai's prescribing compare with other California prescribers?
Of the 23 medications with a state comparison, Dr. Tsai prescribes 11 more often than the typical California prescriber, 1 about as often and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Tsai 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.
