MARIANNE GUTHRIE
Prescription History 1609313758
Nurse Practitioner in O Fallon, IL
What does Marianne Guthrie prescribe?
In 2024, Marianne Guthrie wrote 172 Medicare prescriptions for 6 medications. The most prescribed was Amoxicillin-Clavulanate Potass (amoxicillin/potassium clav), with 57 prescriptions for 56 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 Marianne Guthrie 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 Illinois prescribers.
What it is used for
Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with Illinois prescribers
Marianne Guthrie wrote 57 prescriptions for Amoxicillin-Clavulanate Potass, about 2.2 times as often as the typical Illinois prescriber of it (26). Medicare paid $6.62 per fill, versus $8.39 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 a wide variety of bacterial infections, including those that cause acne.
Compared with Illinois prescribers
Marianne Guthrie wrote 41 prescriptions for Doxycycline Monohydrate, about 1.6 times as often as the typical Illinois prescriber of it (26). Medicare paid $10.94 per fill, versus $15.33 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
Mupirocin is used to treat certain skin infections (such as impetigo).
Compared with Illinois prescribers
Marianne Guthrie wrote 26 prescriptions for Mupirocin, about 81% as often as the typical Illinois prescriber of it (32). Medicare paid $6.52 per fill, versus $7.47 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 Illinois prescribers
Marianne Guthrie wrote 18 prescriptions for Prednisone, about 39% as often as the typical Illinois prescriber of it (46). Medicare paid $0.99 per fill, versus $3.88 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 Illinois prescribers
Marianne Guthrie wrote 17 prescriptions for Azithromycin, about half as often as the typical Illinois prescriber of it (34). Medicare paid $3.53 per fill, versus $5.14 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 an antibiotic used to treat bladder infections (acute cystitis).
Compared with Illinois prescribers
Marianne Guthrie wrote 13 prescriptions for Nitrofurantoin Mono-Macro, about half as often as the typical Illinois prescriber of it (26). Medicare paid $13.15 per fill, versus $14.38 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Marianne Guthrie’s prescriptions
What does Marianne Guthrie prescribe most?
In 2024 Medicare Part D data, Marianne Guthrie's most prescribed medications were Amoxicillin-Clavulanate Potass (57), Doxycycline Monohydrate (41) and Mupirocin (26).
How does Marianne Guthrie's prescribing compare with other Illinois prescribers?
Of the 6 medications with a state comparison, Marianne Guthrie prescribes 2 more often than the typical Illinois prescriber, 1 about as often and 3 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Marianne Guthrie 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 Illinois 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.
