JANET MABEL TSANG MD
Prescription History 1871753699
Psychiatry & Neurology - Psychiatry in San Francisco, CA
What does Dr. Tsang prescribe?
In 2024, Dr. Tsang wrote 1,248 Medicare prescriptions for 31 medications. The most prescribed was Risperidone, with 104 prescriptions.
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. Tsang prescribes.
Medications 31 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 used to treat certain mental/mood disorders (such as schizophrenia, bipolar disorder, irritability associated with autistic disorder).
Compared with California prescribers
Dr. Tsang wrote 104 prescriptions for Risperidone, about 2.1 times as often as the typical California prescriber of it (49). Medicare paid $6.85 per fill, versus $13.84 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 treat certain mental/mood disorders (such as schizophrenia, bipolar disorder, sudden episodes of mania or depression associated with bipolar disorder).
Compared with California prescribers
Dr. Tsang wrote 99 prescriptions for Quetiapine Fumarate, about 1.8 times as often as the typical California prescriber of it (55). Medicare paid $15.92 per fill, versus $19.69 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
Benztropine is used to treat symptoms of Parkinson's disease or involuntary movements due to the side effects of certain psychiatric drugs (antipsychotics such as chlorpromazine/haloperidol).
Compared with California prescribers
Dr. Tsang wrote 98 prescriptions for Benztropine Mesylate, about 1.9 times as often as the typical California prescriber of it (51). Medicare paid $10.93 per fill, versus $12.47 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Tsang wrote 91 prescriptions for Gabapentin, about as often as the typical California prescriber of it (80). Medicare paid $7.84 per fill, versus $15.63 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
Clonazepam is used to prevent and control seizures.
Compared with California prescribers
Dr. Tsang wrote 76 prescriptions for Clonazepam, about 1.9 times as often as the typical California prescriber of it (40). Medicare paid $8.18 per fill, versus $7.09 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 anxiety.
Compared with California prescribers
Dr. Tsang wrote 66 prescriptions for Lorazepam, about 1.5 times as often as the typical California prescriber of it (43). Medicare paid $2.21 per fill, versus $6.52 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 seizure disorders, mental/mood conditions (such as manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with California prescribers
Dr. Tsang wrote 59 prescriptions for Divalproex Sodium Er, about 1.6 times as often as the typical California prescriber of it (37). Medicare paid $53.68 per fill, versus $51.64 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 certain mental/mood disorders (such as schizophrenia, bipolar disorder).
Compared with California prescribers
Dr. Tsang wrote 51 prescriptions for Olanzapine, about as often as the typical California prescriber of it (52). Medicare paid $22.78 per fill, versus $24.98 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 mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, post-traumatic stress disorder, social anxiety disorder).
Compared with California prescribers
Dr. Tsang wrote 50 prescriptions for Sertraline Hcl, about as often as the typical California prescriber of it (46). Medicare paid $5.74 per fill, versus $9.59 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 pain caused by a condition called fibromyalgia that affects the muscles, tendons, ligaments, and supporting tissues.
Compared with California prescribers
Dr. Tsang wrote 48 prescriptions for Savella, about 2.9 times as often as the typical California prescriber of it (17). Medicare paid $487.79 per fill, versus $598.57 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 mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Dr. Tsang wrote 46 prescriptions for Escitalopram Oxalate, about as often as the typical California prescriber of it (48). Medicare paid $14.80 per fill, versus $11.14 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 mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder).
Compared with California prescribers
Dr. Tsang wrote 38 prescriptions for Fluoxetine Hcl, about as often as the typical California prescriber of it (33). Medicare paid $9.50 per fill, versus $11.85 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 mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, anxiety disorders, post-traumatic stress disorder).
Compared with California prescribers
Dr. Tsang wrote 38 prescriptions for Paroxetine Hcl, about 1.5 times as often as the typical California prescriber of it (25). Medicare paid $5.41 per fill, versus $12.24 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 mental/mood disorders (such as bipolar disorder, schizophrenia, Tourette's syndrome, and irritability associated with autistic disorder).
Compared with California prescribers
Dr. Tsang wrote 36 prescriptions for Aripiprazole, about 83% as often as the typical California prescriber of it (43). Medicare paid $47.79 per fill, versus $71.35 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 certain mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Dr. Tsang wrote 34 prescriptions for Duloxetine Hcl, about 84% as often as the typical California prescriber of it (40). Medicare paid $12.80 per fill, versus $24.72 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 used to treat depression.
Compared with California prescribers
Dr. Tsang wrote 34 prescriptions for Trazodone Hcl, about half as often as the typical California prescriber of it (57). Medicare paid $7.87 per fill, versus $9.93 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 anxiety.
Compared with California prescribers
Dr. Tsang wrote 33 prescriptions for Buspirone Hcl, about 90% as often as the typical California prescriber of it (37). Medicare paid $19.39 per fill, versus $13.30 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
This medication is used to treat a certain mental/mood disorder (schizophrenia).
Compared with California prescribers
Dr. Tsang wrote 28 prescriptions for Haloperidol Decanoate, about as often as the typical California prescriber of it (28). Medicare paid $85.86 per fill, versus $49.85 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 mental/mood disorders (such as schizophrenia, psychotic disorders).
Compared with California prescribers
Dr. Tsang wrote 26 prescriptions for Trifluoperazine Hcl, about 1.6 times as often as the typical California prescriber of it (16). Medicare paid $61.88 per fill, versus $55.91 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 treat attention deficit hyperactivity disorder - ADHD.
Compared with California prescribers
Dr. Tsang wrote 25 prescriptions for Dextroamphetamine-Amphetamine, about as often as the typical California prescriber of it (26). Medicare paid $11.68 per fill, versus $28.60 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 a certain mental/mood disorder (schizophrenia).
Compared with California prescribers
Dr. Tsang wrote 21 prescriptions for Abilify Maintena, about 84% as often as the typical California prescriber of it (25). Medicare paid $2,531.50 per fill, versus $2,662.27 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
Atomoxetine is used to treat attention-deficit hyperactivity disorder (ADHD) as part of a total treatment plan, including psychological, social, and other treatments.
Compared with California prescribers
Dr. Tsang wrote 19 prescriptions for Atomoxetine Hcl, about as often as the typical California prescriber of it (18). Medicare paid $137.94 per fill, versus $85.15 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 seizure disorders, certain psychiatric conditions (manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with California prescribers
Dr. Tsang wrote 17 prescriptions for Divalproex Sodium, about 36% as often as the typical California prescriber of it (48). Medicare paid $17.40 per fill, versus $38.94 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
Lamotrigine is used alone or with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Tsang wrote 17 prescriptions for Lamotrigine, about half as often as the typical California prescriber of it (39). Medicare paid $14.88 per fill, versus $14.45 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
Prazosin is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Tsang wrote 17 prescriptions for Prazosin Hcl, about 64% as often as the typical California prescriber of it (26). Medicare paid $18.35 per fill, versus $19.19 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 manic-depressive disorder (bipolar disorder).
Compared with California prescribers
Dr. Tsang wrote 16 prescriptions for Lithium Carbonate, about half as often as the typical California prescriber of it (30). Medicare paid $13.21 per fill, versus $11.55 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 sleeplessness (insomnia).
Compared with California prescribers
Dr. Tsang wrote 13 prescriptions for Ramelteon, about 62% as often as the typical California prescriber of it (21). Medicare paid $53.46 per fill, versus $99.19 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 mental/mood disorders (such as schizophrenia, schizoaffective disorder).
Compared with California prescribers
Dr. Tsang wrote 12 prescriptions for Invega Sustenna, about 32% as often as the typical California prescriber of it (37). Medicare paid $3,592.52 per fill, versus $3,003.69 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 mental/mood disorders (such as schizophrenia, depression associated with bipolar disorder).
Compared with California prescribers
Dr. Tsang wrote 12 prescriptions for Lurasidone Hcl, about 38% as often as the typical California prescriber of it (32). Medicare paid $18.76 per fill, versus $292.84 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 treat certain mental/mood disorders (such as schizophrenia, bipolar disorder, irritability associated with autistic disorder).
Compared with California prescribers
Dr. Tsang wrote 12 prescriptions for Risperidone Odt, about 36% as often as the typical California prescriber of it (33). Medicare paid $438.50 per fill, versus $213.62 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 certain mental/mood disorders (such as schizophrenia, bipolar disorder).
Compared with California prescribers
Dr. Tsang wrote 12 prescriptions for Ziprasidone Hcl, about half as often as the typical California prescriber of it (26). Medicare paid $17.88 per fill, versus $60.41 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. Tsang’s prescriptions
What does Dr. Tsang prescribe most?
In 2024 Medicare Part D data, Dr. Tsang's most prescribed medications were Risperidone (104), Quetiapine Fumarate (99) and Benztropine Mesylate (98).
How does Dr. Tsang's prescribing compare with other California prescribers?
Of the 31 medications with a state comparison, Dr. Tsang prescribes 9 more often than the typical California prescriber, 12 about as often and 10 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Tsang 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.
