GENE YEN PSYCHIATRIST
Prescription History 1477581379
Psychiatry & Neurology - Psychiatry in Los Angeles, CA
What does Gene Yen prescribe?
In 2024, Gene Yen wrote 1,342 Medicare prescriptions for 33 medications. The most prescribed was Olanzapine, with 173 prescriptions for 16 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 Gene Yen prescribes.
Medications 33 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).
Compared with California prescribers
Gene Yen wrote 173 prescriptions for Olanzapine, about 3.4 times as often as the typical California prescriber of it (52). Medicare paid $22.25 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 depression.
Compared with California prescribers
Gene Yen wrote 116 prescriptions for Trazodone Hcl, about 2 times as often as the typical California prescriber of it (57). Medicare paid $3.38 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 depression.
Compared with California prescribers
Gene Yen wrote 101 prescriptions for Mirtazapine, about 2.5 times as often as the typical California prescriber of it (40). Medicare paid $8.55 per fill, versus $19.05 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
Gene Yen wrote 89 prescriptions for Risperidone, about 1.8 times as often as the typical California prescriber of it (49). Medicare paid $6.13 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
Gene Yen wrote 77 prescriptions for Quetiapine Fumarate, about 1.4 times as often as the typical California prescriber of it (55). Medicare paid $10.70 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
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Gene Yen wrote 67 prescriptions for Escitalopram Oxalate, about 1.4 times as often as the typical California prescriber of it (48). Medicare paid $6.15 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 bipolar disorder, schizophrenia, Tourette's syndrome, and irritability associated with autistic disorder).
Compared with California prescribers
Gene Yen wrote 63 prescriptions for Aripiprazole, about 1.5 times as often as the typical California prescriber of it (43). Medicare paid $31.52 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 anxiety.
Compared with California prescribers
Gene Yen wrote 61 prescriptions for Lorazepam, about 1.4 times as often as the typical California prescriber of it (43). Medicare paid $2.50 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 certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, post-traumatic stress disorder, social anxiety disorder).
Compared with California prescribers
Gene Yen wrote 59 prescriptions for Sertraline Hcl, about 1.3 times as often as the typical California prescriber of it (46). Medicare paid $4.68 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 certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, anxiety disorders, post-traumatic stress disorder).
Compared with California prescribers
Gene Yen wrote 56 prescriptions for Paroxetine Hcl, about 2.2 times as often as the typical California prescriber of it (25). Medicare paid $4.04 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
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
Gene Yen wrote 49 prescriptions for Benztropine Mesylate, about as often as the typical California prescriber of it (51). Medicare paid $11.75 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
See also Warning section.
Compared with California prescribers
Gene Yen wrote 46 prescriptions for Clozapine, about 84% as often as the typical California prescriber of it (55). Medicare paid $47.91 per fill, versus $76.09 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 certain mental/mood disorders (such as depression, anxiety, panic attacks, and social anxiety disorder).
Compared with California prescribers
Gene Yen wrote 43 prescriptions for Venlafaxine Hcl Er, about 1.5 times as often as the typical California prescriber of it (28). Medicare paid $11.58 per fill, versus $23.92 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
Gene Yen wrote 42 prescriptions for Fluoxetine Hcl, about 1.3 times as often as the typical California prescriber of it (33). Medicare paid $1.25 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 seizure disorders, certain psychiatric conditions (manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with California prescribers
Gene Yen wrote 29 prescriptions for Divalproex Sodium, about 61% as often as the typical California prescriber of it (48). Medicare paid $31.67 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
This medication is a beta blocker used to treat high blood pressure, irregular heartbeats, shaking (tremors), and other conditions.
Compared with California prescribers
Gene Yen wrote 26 prescriptions for Propranolol Hcl, about as often as the typical California prescriber of it (25). Medicare paid $8.40 per fill, versus $20.69 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
Clonazepam is used to prevent and control seizures.
Compared with California prescribers
Gene Yen wrote 23 prescriptions for Clonazepam, about half as often as the typical California prescriber of it (40). Medicare paid $5.55 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 depression.
Compared with California prescribers
Gene Yen wrote 20 prescriptions for Bupropion Xl, about half as often as the typical California prescriber of it (35). Medicare paid $12.14 per fill, versus $25.68 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 mental/mood disorders (such as schizophrenia, bipolar disorder, sudden episodes of mania or depression associated with bipolar disorder).
Compared with California prescribers
Gene Yen wrote 17 prescriptions for Quetiapine Fumarate Er, about 61% as often as the typical California prescriber of it (28). Medicare paid $29.04 per fill, versus $62.79 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).
Compared with California prescribers
Gene Yen wrote 16 prescriptions for Fluphenazine Decanoate, about 88% as often as the typical California prescriber of it (18). Medicare paid $78.54 per fill, versus $103.27 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 mental/mood disorders (such as schizophrenia, schizoaffective disorder).
Compared with California prescribers
Gene Yen wrote 16 prescriptions for Invega Sustenna, about half as often as the typical California prescriber of it (37). Medicare paid $3,302.51 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 a certain mental/mood disorder (schizophrenia).
Compared with California prescribers
Gene Yen wrote 15 prescriptions for Abilify Maintena, about 60% as often as the typical California prescriber of it (25). Medicare paid $2,738.62 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
This medication is used to treat certain mental/mood disorders (such as schizophrenia, schizoaffective disorder).
Compared with California prescribers
Gene Yen wrote 14 prescriptions for Paliperidone Er, about half as often as the typical California prescriber of it (26). Medicare paid $181.04 per fill, versus $197.53 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
Atenolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Gene Yen wrote 13 prescriptions for Atenolol, about 26% as often as the typical California prescriber of it (50). Medicare paid $2.22 per fill, versus $9.20 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
Gene Yen wrote 13 prescriptions for Atomoxetine Hcl, about 71% as often as the typical California prescriber of it (18). Medicare paid $143.48 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 certain mental/mood disorders (such as schizophrenia, schizoaffective disorders).
Compared with California prescribers
Gene Yen wrote 13 prescriptions for Haloperidol, about 36% as often as the typical California prescriber of it (36). Medicare paid $48.94 per fill, versus $34.79 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
Gene Yen wrote 13 prescriptions for Risperidone Er, about 71% as often as the typical California prescriber of it (18). Medicare paid $1,008.66 per fill, versus $1,181.27 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 mental/mood disorders (such as bipolar disorder, depression, schizophrenia).
Compared with California prescribers
Gene Yen wrote 13 prescriptions for Vraylar, about half as often as the typical California prescriber of it (28). Medicare paid $1,418.20 per fill, versus $1,511.65 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 sleep problem (insomnia).
Compared with California prescribers
Gene Yen wrote 12 prescriptions for Belsomra, about half as often as the typical California prescriber of it (21). Medicare paid $417.56 per fill, versus $454.32 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 treat certain mental/mood disorders (such as schizophrenia).
Compared with California prescribers
Gene Yen wrote 12 prescriptions for Fluphenazine Hcl, about half as often as the typical California prescriber of it (21). Medicare paid $129.47 per fill, versus $147.85 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 obsessive-compulsive disorder (OCD).
Compared with California prescribers
Gene Yen wrote 12 prescriptions for Fluvoxamine Maleate, about half as often as the typical California prescriber of it (23). Medicare paid $55.02 per fill, versus $40.43 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
Oxcarbazepine is used alone or with other medications to treat seizure disorders (epilepsy).
Compared with California prescribers
Gene Yen wrote 12 prescriptions for Oxcarbazepine, about half as often as the typical California prescriber of it (27). Medicare paid $42.67 per fill, versus $57.55 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 manic-depressive disorder (bipolar disorder).
Compared with California prescribers
Gene Yen wrote 11 prescriptions for Lithium Carbonate, about 36% as often as the typical California prescriber of it (30). Medicare paid $6.91 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.
Questions about Gene Yen’s prescriptions
What does Gene Yen prescribe most?
In 2024 Medicare Part D data, Gene Yen's most prescribed medications were Olanzapine (173), Trazodone Hcl (116) and Mirtazapine (101).
How does Gene Yen's prescribing compare with other California prescribers?
Of the 33 medications with a state comparison, Gene Yen prescribes 12 more often than the typical California prescriber, 4 about as often and 17 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Gene Yen 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.
