LYNN YEN MD
Prescription History 1528295821
Psychiatry & Neurology - Psychiatry in Torrance, CA
What does Dr. Yen prescribe?
In 2024, Dr. Yen wrote 2,451 Medicare prescriptions for 46 medications. The most prescribed was Bupropion Xl (bupropion hcl), with 221 prescriptions for 19 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. Yen prescribes.
Medications 46 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 depression.
Compared with California prescribers
Dr. Yen wrote 221 prescriptions for Bupropion Xl, about 6.3 times as often as the typical California prescriber of it (35). Medicare paid $10.42 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
Dr. Yen wrote 189 prescriptions for Quetiapine Fumarate, about 3.5 times as often as the typical California prescriber of it (55). Medicare paid $14.58 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
Alprazolam is used to treat anxiety and panic disorders.
Compared with California prescribers
Dr. Yen wrote 124 prescriptions for Alprazolam, about 2.5 times as often as the typical California prescriber of it (50). Medicare paid $14.64 per fill, versus $5.37 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. Yen wrote 119 prescriptions for Lorazepam, about 2.8 times as often as the typical California prescriber of it (43). Medicare paid $3.32 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, anxiety).
Compared with California prescribers
Dr. Yen wrote 116 prescriptions for Duloxetine Hcl, about 2.9 times as often as the typical California prescriber of it (40). Medicare paid $15.36 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
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with California prescribers
Dr. Yen wrote 101 prescriptions for Zolpidem Tartrate, about 2.3 times as often as the typical California prescriber of it (45). Medicare paid $2.95 per fill, versus $6.02 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 medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with California prescribers
Dr. Yen wrote 98 prescriptions for Escitalopram Oxalate, about 2 times as often as the typical California prescriber of it (48). Medicare paid $6.03 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
Dr. Yen wrote 97 prescriptions for Aripiprazole, about 2.2 times as often as the typical California prescriber of it (43). Medicare paid $63.79 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 depression.
Compared with California prescribers
Dr. Yen wrote 89 prescriptions for Mirtazapine, about 2.2 times as often as the typical California prescriber of it (40). Medicare paid $6.40 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 depression.
Compared with California prescribers
Dr. Yen wrote 82 prescriptions for Trazodone Hcl, about 1.4 times as often as the typical California prescriber of it (57). Medicare paid $4.75 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
Deutetrabenazine is used to decrease involuntary movements (chorea) caused by Huntington's disease.
Compared with California prescribers
Dr. Yen wrote 71 prescriptions for Austedo, about 3 times as often as the typical California prescriber of it (23). Medicare paid $5,442.49 per fill, versus $6,358.88 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. Yen wrote 69 prescriptions for Sertraline Hcl, about 1.5 times as often as the typical California prescriber of it (46). Medicare paid $4.72 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
Clonazepam is used to prevent and control seizures.
Compared with California prescribers
Dr. Yen wrote 67 prescriptions for Clonazepam, about 1.7 times as often as the typical California prescriber of it (40). Medicare paid $4.00 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
Lamotrigine is used alone or with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Yen wrote 64 prescriptions for Lamotrigine, about 1.6 times as often as the typical California prescriber of it (39). Medicare paid $9.02 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
This medication is used to treat depression.
Compared with California prescribers
Dr. Yen wrote 56 prescriptions for Desvenlafaxine Succinate Er, about 2.3 times as often as the typical California prescriber of it (24). Medicare paid $55.08 per fill, versus $62.60 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 certain mental/mood disorders (such as schizophrenia, depression associated with bipolar disorder).
Compared with California prescribers
Dr. Yen wrote 56 prescriptions for Lurasidone Hcl, about 1.8 times as often as the typical California prescriber of it (32). Medicare paid $122.09 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 attention deficit hyperactivity disorder - ADHD.
Compared with California prescribers
Dr. Yen wrote 50 prescriptions for Methylphenidate Hcl, about 2.5 times as often as the typical California prescriber of it (20). Medicare paid $25.60 per fill, versus $25.50 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. Yen wrote 50 prescriptions for Risperidone, about as often as the typical California prescriber of it (49). Medicare paid $8.31 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 a certain sleep problem (insomnia).
Compared with California prescribers
Dr. Yen wrote 49 prescriptions for Belsomra, about 2.3 times as often as the typical California prescriber of it (21). Medicare paid $431.20 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, bipolar disorder).
Compared with California prescribers
Dr. Yen wrote 47 prescriptions for Ziprasidone Hcl, about 1.8 times as often as the typical California prescriber of it (26). Medicare paid $48.28 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.
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. Yen wrote 46 prescriptions for Divalproex Sodium Er, about 1.3 times as often as the typical California prescriber of it (37). Medicare paid $32.48 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 depression, panic attacks, obsessive compulsive disorder).
Compared with California prescribers
Dr. Yen wrote 46 prescriptions for Fluoxetine Hcl, about 1.4 times as often as the typical California prescriber of it (33). Medicare paid $3.25 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 certain mental/mood disorders (such as schizophrenia, bipolar disorder).
Compared with California prescribers
Dr. Yen wrote 43 prescriptions for Olanzapine, about 83% as often as the typical California prescriber of it (52). Medicare paid $8.65 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
Varenicline is used by adults to help stop smoking.
Compared with California prescribers
Dr. Yen wrote 39 prescriptions for Varenicline Tartrate, about 2.1 times as often as the typical California prescriber of it (18). Medicare paid $205.04 per fill, versus $197.54 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 combination medication is used to treat attention deficit hyperactivity disorder - ADHD.
Compared with California prescribers
Dr. Yen wrote 36 prescriptions for Dextroamphetamine-Amphetamine, about 1.4 times as often as the typical California prescriber of it (26). Medicare paid $28.19 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 anxiety.
Compared with California prescribers
Dr. Yen wrote 33 prescriptions for Buspirone Hcl, about 90% as often as the typical California prescriber of it (37). Medicare paid $8.82 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 certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, anxiety disorders, post-traumatic stress disorder).
Compared with California prescribers
Dr. Yen wrote 33 prescriptions for Paroxetine Hcl, about 1.3 times as often as the typical California prescriber of it (25). Medicare paid $4.96 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 depression.
Compared with California prescribers
Dr. Yen wrote 32 prescriptions for Citalopram Hbr, about as often as the typical California prescriber of it (30). Medicare paid $3.39 per fill, versus $8.24 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Yen wrote 28 prescriptions for Gabapentin, about 35% as often as the typical California prescriber of it (80). Medicare paid $12.88 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
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. Yen wrote 27 prescriptions for Atomoxetine Hcl, about 1.5 times as often as the typical California prescriber of it (18). Medicare paid $207.65 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
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. Yen wrote 27 prescriptions for Benztropine Mesylate, about half as often as the typical California prescriber of it (51). Medicare paid $6.41 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
This medication is used to treat certain mental/mood disorders (such as depression, anxiety, panic attacks, and social anxiety disorder).
Compared with California prescribers
Dr. Yen wrote 26 prescriptions for Venlafaxine Hcl Er, about as often as the typical California prescriber of it (28). Medicare paid $7.50 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
Hydroxyzine is used to treat itching caused by allergies.
Compared with California prescribers
Dr. Yen wrote 25 prescriptions for Hydroxyzine Hcl, about 89% as often as the typical California prescriber of it (28). Medicare paid $20.54 per fill, versus $13.85 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
Prazosin is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Yen wrote 22 prescriptions for Prazosin Hcl, about 83% as often as the typical California prescriber of it (26). Medicare paid $8.44 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 attention deficit hyperactivity disorder (ADHD), as part of a total treatment plan including psychological, educational, and social measures.
Compared with California prescribers
Dr. Yen wrote 20 prescriptions for Guanfacine Hcl Er, about as often as the typical California prescriber of it (18). Medicare paid $19.40 per fill, versus $30.67 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. Yen wrote 19 prescriptions for Dextroamphetamine-Amphet Er, about 89% as often as the typical California prescriber of it (21). Medicare paid $36.67 per fill, versus $49.32 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, depression).
Compared with California prescribers
Dr. Yen wrote 16 prescriptions for Rexulti, about half as often as the typical California prescriber of it (28). Medicare paid $1,580.01 per fill, versus $1,455.30 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 contains 2 medicines: buprenorphine and naloxone.
Compared with California prescribers
Dr. Yen wrote 15 prescriptions for Buprenorphine-Naloxone, about 36% as often as the typical California prescriber of it (42). Medicare paid $202.58 per fill, versus $145.54 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 a certain sleep problem (insomnia).
Compared with California prescribers
Dr. Yen wrote 15 prescriptions for Eszopiclone, about 74% as often as the typical California prescriber of it (20). Medicare paid $8.50 per fill, versus $24.07 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. Yen wrote 13 prescriptions for Abilify Maintena, about half as often as the typical California prescriber of it (25). Medicare paid $2,912.58 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 depression.
Compared with California prescribers
Dr. Yen wrote 13 prescriptions for Bupropion Hcl Sr, about half as often as the typical California prescriber of it (23). Medicare paid $15.44 per fill, versus $18.90 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
This medication is used to treat manic-depressive disorder (bipolar disorder).
Compared with California prescribers
Dr. Yen wrote 13 prescriptions for Lithium Carbonate, about half as often as the typical California prescriber of it (30). Medicare paid $10.60 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 alcohol abuse.
Compared with California prescribers
Dr. Yen wrote 13 prescriptions for Vivitrol, about 83% as often as the typical California prescriber of it (16). Medicare paid $1,650.05 per fill, versus $1,596.02 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 medication is used before eye examinations (such as refraction) and to treat certain eye conditions (such as uveitis).
Compared with California prescribers
Dr. Yen wrote 12 prescriptions for Atropine Sulfate, about half as often as the typical California prescriber of it (25). Medicare paid $49.97 per fill, versus $37.90 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
This medication is used to treat a certain sleep problem (insomnia).
Compared with California prescribers
Dr. Yen wrote 12 prescriptions for Dayvigo, about half as often as the typical California prescriber of it (24). Medicare paid $358.11 per fill, versus $342.92 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
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with California prescribers
Dr. Yen wrote 12 prescriptions for Zolpidem Tartrate Er, about 74% as often as the typical California prescriber of it (16). Medicare paid $33.55 per fill, versus $25.25 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. Yen’s prescriptions
What does Dr. Yen prescribe most?
In 2024 Medicare Part D data, Dr. Yen's most prescribed medications were Bupropion Xl (221), Quetiapine Fumarate (189) and Alprazolam (124).
How does Dr. Yen's prescribing compare with other California prescribers?
Of the 46 medications with a state comparison, Dr. Yen prescribes 25 more often than the typical California prescriber, 10 about as often and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. 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.
