DR. WILLIAM JOHN PORTER IV MD
Prescription History 1134748858
Psychiatry & Neurology - Psychiatry in Aurora, CO
What does Dr. Porter prescribe?
In 2024, Dr. Porter wrote 34 Medicare prescriptions for 2 medications. The most prescribed was Clozapine, with 23 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. Porter prescribes.
Medications 2 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 Colorado prescribers.
What it is used for
See also Warning section.
Compared with Colorado prescribers
Dr. Porter wrote 23 prescriptions for Clozapine, about 41% as often as the typical Colorado prescriber of it (57). Medicare paid $106.49 per fill, versus $71.08 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 Colorado prescribers
Dr. Porter wrote 11 prescriptions for Escitalopram Oxalate, about 28% as often as the typical Colorado prescriber of it (39). Medicare paid $6.30 per fill, versus $12.38 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. Porter’s prescriptions
What does Dr. Porter prescribe most?
In 2024 Medicare Part D data, Dr. Porter's most prescribed medications were Clozapine (23) and Escitalopram Oxalate (11).
How does Dr. Porter's prescribing compare with other Colorado prescribers?
Of the 2 medications with a state comparison, Dr. Porter prescribes 2 less often than the typical Colorado prescriber. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Porter 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 Colorado 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.
