DONALD R ROYALL M.D.
Prescription History 1689683021
Psychiatry & Neurology - Psychiatry in San Antonio, TX
What does Dr. Royall prescribe?
In 2024, Dr. Royall wrote 3,862 Medicare prescriptions for 38 medications. The most prescribed was Lamotrigine, with 802 prescriptions for 175 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. Royall prescribes.
Medications 38 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 Texas prescribers.
What it is used for
Lamotrigine is used alone or with other medications to prevent and control seizures.
Compared with Texas prescribers
Dr. Royall wrote 802 prescriptions for Lamotrigine, about 19 times as often as the typical Texas prescriber of it (42). Medicare paid $9.30 per fill, versus $14.17 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 Texas prescribers
Dr. Royall wrote 590 prescriptions for Sertraline Hcl, about 10 times as often as the typical Texas prescriber of it (59). Medicare paid $10.23 per fill, versus $9.11 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 Texas prescribers
Dr. Royall wrote 297 prescriptions for Quetiapine Fumarate, about 5.9 times as often as the typical Texas prescriber of it (50). Medicare paid $16.38 per fill, versus $18.12 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
This medication is used to treat certain mental/mood disorders (such as depression, anxiety).
Compared with Texas prescribers
Dr. Royall wrote 240 prescriptions for Escitalopram Oxalate, about 4.7 times as often as the typical Texas prescriber of it (51). Medicare paid $9.05 per fill, versus $10.58 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 Texas prescribers
Dr. Royall wrote 211 prescriptions for Trazodone Hcl, about 3.1 times as often as the typical Texas prescriber of it (67). Medicare paid $8.41 per fill, versus $8.61 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 Texas prescribers
Dr. Royall wrote 176 prescriptions for Duloxetine Hcl, about 3.4 times as often as the typical Texas prescriber of it (52). Medicare paid $31.16 per fill, versus $23.99 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 Texas prescribers
Dr. Royall wrote 167 prescriptions for Clonazepam, about 3.5 times as often as the typical Texas prescriber of it (48). Medicare paid $11.71 per fill, versus $8.82 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 Texas prescribers
Dr. Royall wrote 159 prescriptions for Fluoxetine Hcl, about 4.3 times as often as the typical Texas prescriber of it (37). Medicare paid $9.03 per fill, versus $10.79 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 depression, anxiety, panic attacks, and social anxiety disorder).
Compared with Texas prescribers
Dr. Royall wrote 118 prescriptions for Venlafaxine Hcl Er, about 3.8 times as often as the typical Texas prescriber of it (31). Medicare paid $45.44 per fill, versus $23.06 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
Alprazolam is used to treat anxiety and panic disorders.
Compared with Texas prescribers
Dr. Royall wrote 85 prescriptions for Alprazolam, about 1.3 times as often as the typical Texas prescriber of it (66). Medicare paid $5.69 per fill, versus $5.46 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 depression.
Compared with Texas prescribers
Dr. Royall wrote 83 prescriptions for Mirtazapine, about 1.8 times as often as the typical Texas prescriber of it (46). Medicare paid $13.04 per fill, versus $19.94 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
Memantine is used to treat moderate to severe confusion (dementia) related to Alzheimer's disease.
Compared with Texas prescribers
Dr. Royall wrote 72 prescriptions for Memantine Hcl, about as often as the typical Texas prescriber of it (68). Medicare paid $21.65 per fill, versus $29.92 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 anxiety.
Compared with Texas prescribers
Dr. Royall wrote 68 prescriptions for Buspirone Hcl, about 1.5 times as often as the typical Texas prescriber of it (47). Medicare paid $16.70 per fill, versus $14.51 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
Donepezil is used to treat confusion (dementia) related to Alzheimer's disease.
Compared with Texas prescribers
Dr. Royall wrote 62 prescriptions for Donepezil Hcl, about 89% as often as the typical Texas prescriber of it (70). Medicare paid $8.20 per fill, versus $12.48 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 Texas prescribers
Dr. Royall wrote 61 prescriptions for Bupropion Xl, about 1.6 times as often as the typical Texas prescriber of it (38). Medicare paid $19.54 per fill, versus $24.94 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 used to treat depression.
Compared with Texas prescribers
Dr. Royall wrote 57 prescriptions for Citalopram Hbr, about 1.6 times as often as the typical Texas prescriber of it (36). Medicare paid $3.49 per fill, versus $7.17 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 Texas prescribers
Dr. Royall wrote 56 prescriptions for Risperidone, about 1.2 times as often as the typical Texas prescriber of it (47). Medicare paid $15.59 per fill, versus $13.92 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 Texas prescribers
Dr. Royall wrote 48 prescriptions for Hydroxyzine Hcl, about 1.5 times as often as the typical Texas prescriber of it (32). Medicare paid $21.16 per fill, versus $17.41 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 certain mental/mood disorders (such as bipolar disorder, schizophrenia, Tourette's syndrome, and irritability associated with autistic disorder).
Compared with Texas prescribers
Dr. Royall wrote 40 prescriptions for Aripiprazole, about as often as the typical Texas prescriber of it (41). Medicare paid $16.32 per fill, versus $59.96 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 Texas prescribers
Dr. Royall wrote 40 prescriptions for Desvenlafaxine Succinate Er, about 1.4 times as often as the typical Texas prescriber of it (28). Medicare paid $45.58 per fill, versus $57.39 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
This medication is used to treat anxiety.
Compared with Texas prescribers
Dr. Royall wrote 40 prescriptions for Lorazepam, about as often as the typical Texas prescriber of it (39). Medicare paid $5.34 per fill, versus $6.76 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 seizure disorders, mental/mood conditions (such as manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with Texas prescribers
Dr. Royall wrote 35 prescriptions for Divalproex Sodium Er, about as often as the typical Texas prescriber of it (38). Medicare paid $31.20 per fill, versus $53.10 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 Texas prescribers
Dr. Royall wrote 33 prescriptions for Gabapentin, about 34% as often as the typical Texas prescriber of it (96). Medicare paid $11.26 per fill, versus $15.87 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 Texas prescribers
Dr. Royall wrote 32 prescriptions for Olanzapine, about 76% as often as the typical Texas prescriber of it (42). Medicare paid $23.97 per fill, versus $22.50 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
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with Texas prescribers
Dr. Royall wrote 32 prescriptions for Zolpidem Tartrate, about 68% as often as the typical Texas prescriber of it (47). Medicare paid $7.65 per fill, versus $7.60 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
Hydroxyzine is used to treat itching caused by allergies.
Compared with Texas prescribers
Dr. Royall wrote 31 prescriptions for Hydroxyzine Pamoate, about 89% as often as the typical Texas prescriber of it (35). Medicare paid $8.89 per fill, versus $13.53 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 certain mental/mood disorders (such as depression, panic attacks, obsessive compulsive disorder, anxiety disorders, post-traumatic stress disorder).
Compared with Texas prescribers
Dr. Royall wrote 31 prescriptions for Paroxetine Hcl, about as often as the typical Texas prescriber of it (27). Medicare paid $12.56 per fill, versus $14.29 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 Texas prescribers
Dr. Royall wrote 27 prescriptions for Propranolol Hcl, about as often as the typical Texas prescriber of it (24). Medicare paid $5.76 per fill, versus $15.40 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 Texas prescribers
Dr. Royall wrote 25 prescriptions for Fluvoxamine Maleate, about as often as the typical Texas prescriber of it (23). Medicare paid $18.41 per fill, versus $45.55 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
Diazepam is used to treat anxiety, alcohol withdrawal, and seizures.
Compared with Texas prescribers
Dr. Royall wrote 24 prescriptions for Diazepam, about 88% as often as the typical Texas prescriber of it (27). Medicare paid $5.42 per fill, versus $6.54 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 attention deficit hyperactivity disorder - ADHD.
Compared with Texas prescribers
Dr. Royall wrote 22 prescriptions for Methylphenidate Hcl, about as often as the typical Texas prescriber of it (22). Medicare paid $12.68 per fill, versus $26.71 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 mental/mood disorders (such as bipolar disorder, depression, schizophrenia).
Compared with Texas prescribers
Dr. Royall wrote 19 prescriptions for Vraylar, about 69% as often as the typical Texas prescriber of it (27). Medicare paid $1,532.61 per fill, versus $1,502.26 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 Texas prescribers
Dr. Royall wrote 16 prescriptions for Prazosin Hcl, about half as often as the typical Texas prescriber of it (30). Medicare paid $28.39 per fill, versus $18.46 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 seizure disorders, certain psychiatric conditions (manic phase of bipolar disorder), and to prevent migraine headaches.
Compared with Texas prescribers
Dr. Royall wrote 14 prescriptions for Divalproex Sodium, about 23% as often as the typical Texas prescriber of it (62). Medicare paid $36.59 per fill, versus $37.30 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 schizophrenia, schizoaffective disorder).
Compared with Texas prescribers
Dr. Royall wrote 14 prescriptions for Paliperidone Er, about half as often as the typical Texas prescriber of it (25). Medicare paid $412.86 per fill, versus $199.23 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 Texas prescribers
Dr. Royall wrote 12 prescriptions for Bupropion Hcl Sr, about half as often as the typical Texas prescriber of it (24). Medicare paid $16.99 per fill, versus $19.43 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
This combination medication is used to treat attention deficit hyperactivity disorder - ADHD.
Compared with Texas prescribers
Dr. Royall wrote 12 prescriptions for Dextroamphetamine-Amphetamine, about 35% as often as the typical Texas prescriber of it (34). Medicare paid $16.86 per fill, versus $33.05 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, depression associated with bipolar disorder).
Compared with Texas prescribers
Dr. Royall wrote 11 prescriptions for Lurasidone Hcl, about 36% as often as the typical Texas prescriber of it (31). Medicare paid $246.19 per fill, versus $223.99 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. Royall’s prescriptions
What does Dr. Royall prescribe most?
In 2024 Medicare Part D data, Dr. Royall's most prescribed medications were Lamotrigine (802), Sertraline Hcl (590) and Quetiapine Fumarate (297).
How does Dr. Royall's prescribing compare with other Texas prescribers?
Of the 38 medications with a state comparison, Dr. Royall prescribes 16 more often than the typical Texas prescriber, 13 about as often and 9 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Royall 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 Texas 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.
