DANIEL C. YAU MD
Prescription History 1437218021
Ophthalmology in Riverside, CA
What does Dr. Yau prescribe?
In 2024, Dr. Yau wrote 1,927 Medicare prescriptions for 17 medications. The most prescribed was Latanoprost, with 673 prescriptions for 205 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. Yau prescribes.
Medications 17 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. Yau wrote 673 prescriptions for Latanoprost, about 4.2 times as often as the typical California prescriber of it (159). Medicare paid $11.71 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. Yau wrote 260 prescriptions for Dorzolamide-Timolol, about 2.1 times as often as the typical California prescriber of it (122). Medicare paid $23.44 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 open-angle glaucoma or high fluid pressure in the eye.
Compared with California prescribers
Dr. Yau wrote 209 prescriptions for Brimonidine Tartrate, about 2.3 times as often as the typical California prescriber of it (89). Medicare paid $14.93 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 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. Yau wrote 146 prescriptions for Timolol Maleate, about 1.6 times as often as the typical California prescriber of it (93). Medicare paid $15.51 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
Cyclosporine eye drops are used to treat a certain type of dry eyes.
Compared with California prescribers
Dr. Yau wrote 130 prescriptions for Cyclosporine, about 2 times as often as the typical California prescriber of it (64). Medicare paid $118.13 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
This medication is used to treat certain eye conditions due to inflammation or injury.
Compared with California prescribers
Dr. Yau wrote 117 prescriptions for Prednisolone Acetate, about 76% as often as the typical California prescriber of it (155). Medicare paid $50.05 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
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. Yau wrote 84 prescriptions for Bimatoprost, about 2 times as often as the typical California prescriber of it (43). Medicare paid $77.75 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
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. Yau wrote 52 prescriptions for Betaxolol Hcl, about 2.5 times as often as the typical California prescriber of it (21). Medicare paid $81.26 per fill, versus $86.68 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. Yau wrote 47 prescriptions for Dorzolamide Hcl, about as often as the typical California prescriber of it (51). Medicare paid $21.35 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 treat eye infections.
Compared with California prescribers
Dr. Yau wrote 45 prescriptions for Ofloxacin, about 82% as often as the typical California prescriber of it (55). Medicare paid $14.50 per fill, versus $15.84 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. Yau wrote 38 prescriptions for Ketorolac Tromethamine, about 40% as often as the typical California prescriber of it (95). Medicare paid $26.41 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
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. Yau wrote 35 prescriptions for Levobunolol Hcl, about as often as the typical California prescriber of it (34). Medicare paid $43.26 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 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. Yau wrote 33 prescriptions for Neomycin-Polymyxin-Dexameth, about 80% as often as the typical California prescriber of it (41). Medicare paid $13.16 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
Netarsudil is used to treat high pressure inside the eye due to certain eye conditions (such as open-angle glaucoma, ocular hypertension).
Compared with California prescribers
Dr. Yau wrote 17 prescriptions for Rhopressa, about 33% as often as the typical California prescriber of it (52). Medicare paid $637.87 per fill, versus $494.93 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. Yau wrote 15 prescriptions for Fluorometholone, about 37% as often as the typical California prescriber of it (40). Medicare paid $163.37 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 certain eye infections (such as conjunctivitis).
Compared with California prescribers
Dr. Yau wrote 14 prescriptions for Erythromycin, about 28% as often as the typical California prescriber of it (49). Medicare paid $17.06 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
Valacyclovir is used to treat infections caused by certain types of viruses.
Compared with California prescribers
Dr. Yau wrote 12 prescriptions for Valacyclovir, about half as often as the typical California prescriber of it (22). Medicare paid $89.91 per fill, versus $35.75 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. Yau’s prescriptions
What does Dr. Yau prescribe most?
In 2024 Medicare Part D data, Dr. Yau's most prescribed medications were Latanoprost (673), Dorzolamide-Timolol (260) and Brimonidine Tartrate (209).
How does Dr. Yau's prescribing compare with other California prescribers?
Of the 17 medications with a state comparison, Dr. Yau prescribes 7 more often than the typical California prescriber, 5 about as often and 5 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Yau 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.
