RYAN PARNELL DDS, MD
Prescription History 1871908673
Dentist - Oral and Maxillofacial Surgery in The Woodlands, TX
What does Dr. Parnell prescribe?
In 2024, Dr. Parnell wrote 458 Medicare prescriptions for 7 medications. The most prescribed was Chlorhexidine Gluconate, with 156 prescriptions for 143 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. Parnell prescribes.
Medications 7 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
This medication is used along with regular tooth brushing/flossing to treat gingivitis, a gum disease that causes red, swollen, and easily bleeding gums.
Compared with Texas prescribers
Dr. Parnell wrote 156 prescriptions for Chlorhexidine Gluconate, about 3.4 times as often as the typical Texas prescriber of it (45). Medicare paid $3.55 per fill, versus $4.12 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
Amoxicillin is used to treat a wide variety of bacterial infections.
Compared with Texas prescribers
Dr. Parnell wrote 131 prescriptions for Amoxicillin, about 3.3 times as often as the typical Texas prescriber of it (39). Medicare paid $1.83 per fill, versus $2.73 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 Texas prescribers
Dr. Parnell wrote 65 prescriptions for Tramadol Hcl, about as often as the typical Texas prescriber of it (61). Medicare paid $0.88 per fill, versus $7.30 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 alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with Texas prescribers
Dr. Parnell wrote 44 prescriptions for Ondansetron Hcl, about 1.5 times as often as the typical Texas prescriber of it (30). Medicare paid $1.83 per fill, versus $12.56 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 Texas prescribers
Dr. Parnell wrote 23 prescriptions for Clindamycin Hcl, about as often as the typical Texas prescriber of it (23). Medicare paid $6.09 per fill, versus $8.56 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 Texas prescribers
Dr. Parnell wrote 20 prescriptions for Hydrocodone-Acetaminophen, about 17% as often as the typical Texas prescriber of it (120). Medicare paid $2.95 per fill, versus $25.16 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
Ibuprofen is used to relieve pain from various conditions such as headache, dental pain, menstrual cramps, muscle aches, or arthritis.
Compared with Texas prescribers
Dr. Parnell wrote 19 prescriptions for Ibuprofen, about half as often as the typical Texas prescriber of it (35). Medicare paid $2.61 per fill, versus $7.30 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. Parnell’s prescriptions
What does Dr. Parnell prescribe most?
In 2024 Medicare Part D data, Dr. Parnell's most prescribed medications were Chlorhexidine Gluconate (156), Amoxicillin (131) and Tramadol Hcl (65).
How does Dr. Parnell's prescribing compare with other Texas prescribers?
Of the 7 medications with a state comparison, Dr. Parnell prescribes 3 more often than the typical Texas prescriber, 2 about as often and 2 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Parnell 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.
