MARK AINSLEY INNIS MD
Prescription History 1740450220
Emergency Medicine in Portsmouth, VA
What does Dr. Innis prescribe?
In 2024, Dr. Innis wrote 451 Medicare prescriptions for 10 medications. The most prescribed was Arexvy (rsvpref3 antigen/as01e/pf), with 285 prescriptions for 281 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. Innis prescribes.
Medications 10 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 Virginia prescribers.
What it is used for
This vaccine is used to prevent infection by the respiratory syncytial virus (RSV).
Compared with Virginia prescribers
Dr. Innis wrote 285 prescriptions for Arexvy, about 2.2 times as often as the typical Virginia prescriber of it (129). Medicare paid $295.25 per fill, versus $262.90 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 combination medication is used to help relieve moderate to severe pain.
Compared with Virginia prescribers
Dr. Innis wrote 33 prescriptions for Oxycodone-Acetaminophen, about half as often as the typical Virginia prescriber of it (58). Medicare paid $3.72 per fill, versus $22.20 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 Virginia prescribers
Dr. Innis wrote 27 prescriptions for Cephalexin, about 89% as often as the typical Virginia prescriber of it (30). Medicare paid $4.56 per fill, versus $7.06 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
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with Virginia prescribers
Dr. Innis wrote 25 prescriptions for Prednisone, about half as often as the typical Virginia prescriber of it (49). Medicare paid $1.35 per fill, versus $4.45 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
Meclizine is an antihistamine that is used to prevent and treat nausea, vomiting, and dizziness caused by motion sickness.
Compared with Virginia prescribers
Dr. Innis wrote 16 prescriptions for Meclizine Hcl, about 65% as often as the typical Virginia prescriber of it (25). Medicare paid $3.01 per fill, versus $8.26 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
Azithromycin is used to treat a wide variety of bacterial infections.
Compared with Virginia prescribers
Dr. Innis wrote 15 prescriptions for Azithromycin, about half as often as the typical Virginia prescriber of it (33). Medicare paid $7.83 per fill, versus $5.74 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
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with Virginia prescribers
Dr. Innis wrote 14 prescriptions for Albuterol Sulfate Hfa, about 22% as often as the typical Virginia prescriber of it (65). Medicare paid $27.88 per fill, versus $26.36 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, including those that cause acne.
Compared with Virginia prescribers
Dr. Innis wrote 14 prescriptions for Doxycycline Hyclate, about half as often as the typical Virginia prescriber of it (32). Medicare paid $4.56 per fill, versus $11.11 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 vaccine is used to prevent a certain virus infection (polio).
Compared with Virginia prescribers
Dr. Innis wrote 11 prescriptions for Ipol, about 20% as often as the typical Virginia prescriber of it (55). Medicare paid $60.76 per fill, versus $40.67 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
Dulaglutide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with Virginia prescribers
Dr. Innis wrote 11 prescriptions for Trulicity, about 27% as often as the typical Virginia prescriber of it (41). Medicare paid $970.24 per fill, versus $1,205.55 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. Innis’s prescriptions
What does Dr. Innis prescribe most?
In 2024 Medicare Part D data, Dr. Innis's most prescribed medications were Arexvy (285), Oxycodone-Acetaminophen (33) and Cephalexin (27).
How does Dr. Innis's prescribing compare with other Virginia prescribers?
Of the 10 medications with a state comparison, Dr. Innis prescribes 1 more often than the typical Virginia prescriber, 1 about as often and 8 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Innis 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 Virginia 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.
