MR. PARKER PRESTON DAVIS
Prescription History 1942083621
Physician Assistant - Surgical in Santa Maria, CA
What does Parker Davis prescribe?
In 2024, Parker Davis wrote 174 Medicare prescriptions for 6 medications. The most prescribed was Ondansetron Hcl, with 45 prescriptions for 45 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 Parker Davis prescribes.
Medications 6 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 alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with California prescribers
Parker Davis wrote 45 prescriptions for Ondansetron Hcl, about 1.6 times as often as the typical California prescriber of it (28). Medicare paid $4.70 per fill, versus $14.67 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
See also Warning section.
Compared with California prescribers
Parker Davis wrote 42 prescriptions for Naproxen, about 1.4 times as often as the typical California prescriber of it (29). Medicare paid $8.73 per fill, versus $9.70 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 wide variety of bacterial infections.
Compared with California prescribers
Parker Davis wrote 35 prescriptions for Cephalexin, about 1.2 times as often as the typical California prescriber of it (30). Medicare paid $2.89 per fill, versus $7.62 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 combination medication is used to relieve moderate to severe pain.
Compared with California prescribers
Parker Davis wrote 21 prescriptions for Hydrocodone-Acetaminophen, about 28% as often as the typical California prescriber of it (76). Medicare paid $9.51 per fill, versus $21.39 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
See also Warning section.
Compared with California prescribers
Parker Davis wrote 19 prescriptions for Acetaminophen-Codeine, about 65% as often as the typical California prescriber of it (29). Medicare paid $8.53 per fill, versus $17.48 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
Clindamycin is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Parker Davis wrote 12 prescriptions for Clindamycin Hcl, about half as often as the typical California prescriber of it (21). Medicare paid $3.76 per fill, versus $8.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Parker Davis’s prescriptions
What does Parker Davis prescribe most?
In 2024 Medicare Part D data, Parker Davis's most prescribed medications were Ondansetron Hcl (45), Naproxen (42) and Cephalexin (35).
How does Parker Davis's prescribing compare with other California prescribers?
Of the 6 medications with a state comparison, Parker Davis prescribes 2 more often than the typical California prescriber, 1 about as often and 3 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Parker Davis 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.
