WILLIAM CHU M.D.
Prescription History 1992063721
Urology in Los Angeles, CA
What does Dr. Chu prescribe?
In 2024, Dr. Chu wrote 1,261 Medicare prescriptions for 14 medications. The most prescribed was Tamsulosin Hcl, with 374 prescriptions for 148 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. Chu prescribes.
Medications 14 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
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with California prescribers
Dr. Chu wrote 374 prescriptions for Tamsulosin Hcl, about 4.4 times as often as the typical California prescriber of it (84). Medicare paid $15.31 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.
What it is used for
Finasteride is used to shrink an enlarged prostate (benign prostatic hyperplasia or BPH) in adult men.
Compared with California prescribers
Dr. Chu wrote 310 prescriptions for Finasteride, about 5.5 times as often as the typical California prescriber of it (56). Medicare paid $15.19 per fill, versus $13.71 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 bladder problems (overactive bladder, neurogenic detrusor overactivity).
Compared with California prescribers
Dr. Chu wrote 227 prescriptions for Myrbetriq, about 5 times as often as the typical California prescriber of it (45). Medicare paid $545.76 per fill, versus $698.68 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
This medication is used to treat certain bladder problems (overactive bladder, neurogenic detrusor overactivity).
Compared with California prescribers
Dr. Chu wrote 107 prescriptions for Mirabegron Er, about 3.9 times as often as the typical California prescriber of it (27). Medicare paid $266.76 per fill, versus $401.00 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 variety of bacterial infections.
Compared with California prescribers
Dr. Chu wrote 78 prescriptions for Ciprofloxacin Hcl, about 2.6 times as often as the typical California prescriber of it (30). Medicare paid $7.00 per fill, versus $6.32 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 make the urine less acidic.
Compared with California prescribers
Dr. Chu wrote 34 prescriptions for Potassium Citrate Er, about 1.2 times as often as the typical California prescriber of it (28). Medicare paid $106.68 per fill, versus $98.31 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
Terazosin is used alone or with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Chu wrote 26 prescriptions for Terazosin Hcl, about 72% as often as the typical California prescriber of it (36). Medicare paid $38.85 per fill, versus $37.76 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 an overactive bladder.
Compared with California prescribers
Dr. Chu wrote 26 prescriptions for Trospium Chloride, about 84% as often as the typical California prescriber of it (31). Medicare paid $38.16 per fill, versus $46.81 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 variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with California prescribers
Dr. Chu wrote 16 prescriptions for Betamethasone Valerate, about 85% as often as the typical California prescriber of it (19). Medicare paid $12.45 per fill, versus $37.72 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 combination of two antibiotics: sulfamethoxazole and trimethoprim.
Compared with California prescribers
Dr. Chu wrote 15 prescriptions for Sulfamethoxazole-Trimethoprim, about half as often as the typical California prescriber of it (25). Medicare paid $6.53 per fill, versus $4.62 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 combination medication is used to relieve moderate to severe pain.
Compared with California prescribers
Dr. Chu wrote 14 prescriptions for Hydrocodone-Acetaminophen, about 18% as often as the typical California prescriber of it (76). Medicare paid $8.73 per fill, versus $21.39 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
Tadalafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).
Compared with California prescribers
Dr. Chu wrote 12 prescriptions for Tadalafil, about 37% as often as the typical California prescriber of it (33). Medicare paid $22.25 per fill, versus $193.21 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Compared with California prescribers
Dr. Chu wrote 11 prescriptions for Insulin Syringe, about 64% as often as the typical California prescriber of it (17). Medicare paid $7.88 per fill, versus $30.83 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
This medication is used to treat or prevent certain urinary tract infections.
Compared with California prescribers
Dr. Chu wrote 11 prescriptions for Nitrofurantoin, about half as often as the typical California prescriber of it (25). Medicare paid $11.11 per fill, versus $31.66 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. Chu’s prescriptions
What does Dr. Chu prescribe most?
In 2024 Medicare Part D data, Dr. Chu's most prescribed medications were Tamsulosin Hcl (374), Finasteride (310) and Myrbetriq (227).
How does Dr. Chu's prescribing compare with other California prescribers?
Of the 14 medications with a state comparison, Dr. Chu prescribes 5 more often than the typical California prescriber, 3 about as often and 6 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chu 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.
