SIERRA DAWN VANDERKELEN MD
Prescription History 1104388065
Family Medicine in Greenville, SC
What does Dr. Vanderkelen prescribe?
In 2024, Dr. Vanderkelen wrote 1,018 Medicare prescriptions for 40 medications. The most prescribed was Atorvastatin Calcium, with 102 prescriptions for 44 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. Vanderkelen prescribes.
Medications 40 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 South Carolina prescribers.
What it is used for
Atorvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 102 prescriptions for Atorvastatin Calcium, about half as often as the typical South Carolina prescriber of it (187). Medicare paid $6.98 per fill, versus $10.24 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 73 prescriptions for Amlodipine Besylate, about half as often as the typical South Carolina prescriber of it (164). Medicare paid $3.11 per fill, versus $5.78 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
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 44 prescriptions for Losartan Potassium, about 40% as often as the typical South Carolina prescriber of it (111). Medicare paid $6.03 per fill, versus $10.13 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
Gabapentin is used with other medications to prevent and control seizures.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 41 prescriptions for Gabapentin, about half as often as the typical South Carolina prescriber of it (97). Medicare paid $6.78 per fill, versus $15.01 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
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 39 prescriptions for Omeprazole, about 35% as often as the typical South Carolina prescriber of it (113). Medicare paid $8.42 per fill, versus $12.91 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
Levothyroxine is used to treat an underactive thyroid (hypothyroidism).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 37 prescriptions for Levothyroxine Sodium, about 24% as often as the typical South Carolina prescriber of it (152). Medicare paid $4.97 per fill, versus $10.28 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
Rosuvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 37 prescriptions for Rosuvastatin Calcium, about 28% as often as the typical South Carolina prescriber of it (131). Medicare paid $4.60 per fill, versus $15.06 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
Fluticasone is used to relieve seasonal and year-round allergic and non-allergic nasal symptoms, such as stuffy/runny nose, itching, and sneezing.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 35 prescriptions for Fluticasone Propionate, about half as often as the typical South Carolina prescriber of it (65). Medicare paid $7.96 per fill, versus $14.29 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/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 34 prescriptions for Amoxicillin-Clavulanate Potass, about 1.2 times as often as the typical South Carolina prescriber of it (29). Medicare paid $4.92 per fill, versus $8.47 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
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 South Carolina prescribers
Dr. Vanderkelen wrote 33 prescriptions for Albuterol Sulfate Hfa, about half as often as the typical South Carolina prescriber of it (73). Medicare paid $34.79 per fill, versus $30.67 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
This medication is used to treat high blood pressure.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 33 prescriptions for Hydrochlorothiazide, about 41% as often as the typical South Carolina prescriber of it (81). Medicare paid $2.11 per fill, versus $4.02 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
Pantoprazole is used to treat certain stomach and esophagus problems (such as acid reflux).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 33 prescriptions for Pantoprazole Sodium, about 38% as often as the typical South Carolina prescriber of it (86). Medicare paid $4.62 per fill, versus $12.36 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
Lisinopril is used to treat high blood pressure.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 27 prescriptions for Lisinopril, about 26% as often as the typical South Carolina prescriber of it (104). Medicare paid $2.72 per fill, versus $6.57 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 a beta-blocker used to treat chest pain (angina), heart failure, and high blood pressure.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 26 prescriptions for Metoprolol Succinate, about 24% as often as the typical South Carolina prescriber of it (107). Medicare paid $16.84 per fill, versus $13.83 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 depression.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 26 prescriptions for Trazodone Hcl, about 35% as often as the typical South Carolina prescriber of it (74). Medicare paid $2.53 per fill, versus $8.64 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 a mineral supplement used to treat or prevent low amounts of potassium in the blood.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 24 prescriptions for Potassium Chloride, about 38% as often as the typical South Carolina prescriber of it (63). Medicare paid $7.47 per fill, versus $18.07 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
Zolpidem is used for a short time to treat a certain sleep problem (insomnia) in adults.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 24 prescriptions for Zolpidem Tartrate, about 39% as often as the typical South Carolina prescriber of it (62). Medicare paid $3.12 per fill, versus $5.99 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
Semaglutide is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 21 prescriptions for Ozempic, about 33% as often as the typical South Carolina prescriber of it (63). Medicare paid $1,219.89 per fill, versus $1,292.73 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
Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 20 prescriptions for Metformin Hcl, about 23% as often as the typical South Carolina prescriber of it (88). Medicare paid $3.05 per fill, versus $6.92 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
Cyclobenzaprine is used short-term to treat muscle spasms.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 19 prescriptions for Cyclobenzaprine Hcl, about half as often as the typical South Carolina prescriber of it (42). Medicare paid $1.68 per fill, versus $7.64 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 South Carolina prescribers
Dr. Vanderkelen wrote 19 prescriptions for Nitrofurantoin Mono-Macro, about 69% as often as the typical South Carolina prescriber of it (27). Medicare paid $7.34 per fill, versus $15.15 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
Furosemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 18 prescriptions for Furosemide, about 23% as often as the typical South Carolina prescriber of it (79). Medicare paid $1.41 per fill, versus $4.54 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
Montelukast is used to control and prevent symptoms caused by asthma (such as wheezing and shortness of breath).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 18 prescriptions for Montelukast Sodium, about 25% as often as the typical South Carolina prescriber of it (71). Medicare paid $7.90 per fill, versus $10.60 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 South Carolina prescribers
Dr. Vanderkelen wrote 17 prescriptions for Prednisone, about 31% as often as the typical South Carolina prescriber of it (55). Medicare paid $1.24 per fill, versus $3.83 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 South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Azithromycin, about 42% as often as the typical South Carolina prescriber of it (38). Medicare paid $3.42 per fill, versus $4.82 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 South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Doxycycline Hyclate, about half as often as the typical South Carolina prescriber of it (35). Medicare paid $3.53 per fill, versus $11.55 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 South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Escitalopram Oxalate, about 27% as often as the typical South Carolina prescriber of it (59). Medicare paid $3.09 per fill, versus $11.46 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
Ezetimibe is used along with a low cholesterol/low fat diet and exercise to help lower cholesterol in the blood.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Ezetimibe, about 31% as often as the typical South Carolina prescriber of it (52). Medicare paid $22.08 per fill, versus $26.89 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 pain caused by nerve damage due to diabetes, shingles (herpes zoster) infection, or spinal cord injury.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Pregabalin, about 33% as often as the typical South Carolina prescriber of it (49). Medicare paid $4.43 per fill, versus $23.86 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 variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 16 prescriptions for Triamcinolone Acetonide, about 42% as often as the typical South Carolina prescriber of it (38). Medicare paid $3.01 per fill, versus $10.09 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 South Carolina prescribers
Dr. Vanderkelen wrote 15 prescriptions for Duloxetine Hcl, about 27% as often as the typical South Carolina prescriber of it (56). Medicare paid $14.38 per fill, versus $24.99 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
Tamsulosin is used by men to treat the symptoms of an enlarged prostate (benign prostatic hyperplasia-BPH).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 15 prescriptions for Tamsulosin Hcl, about 17% as often as the typical South Carolina prescriber of it (86). Medicare paid $8.27 per fill, versus $13.82 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
Fluconazole is used to treat vaginal yeast infections.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 13 prescriptions for Fluconazole, about half as often as the typical South Carolina prescriber of it (27). Medicare paid $2.19 per fill, versus $7.73 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
Empagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 12 prescriptions for Jardiance, about 22% as often as the typical South Carolina prescriber of it (55). Medicare paid $1,189.67 per fill, versus $1,010.62 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
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 12 prescriptions for Metoprolol Tartrate, about 19% as often as the typical South Carolina prescriber of it (64). Medicare paid $2.89 per fill, versus $6.30 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 to treat a wide variety of bacterial infections.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 11 prescriptions for Cephalexin, about 34% as often as the typical South Carolina prescriber of it (33). Medicare paid $3.33 per fill, versus $6.45 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
This medication is used to treat depression.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 11 prescriptions for Citalopram Hbr, about 27% as often as the typical South Carolina prescriber of it (41). Medicare paid $3.46 per fill, versus $6.63 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
Diazepam is used to treat anxiety, alcohol withdrawal, and seizures.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 11 prescriptions for Diazepam, about 33% as often as the typical South Carolina prescriber of it (33). Medicare paid $8.55 per fill, versus $5.57 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 South Carolina prescribers
Dr. Vanderkelen wrote 11 prescriptions for Diclofenac Sodium, about 24% as often as the typical South Carolina prescriber of it (45). Medicare paid $20.00 per fill, versus $29.08 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 combination medication is used to help relieve moderate to severe pain.
Compared with South Carolina prescribers
Dr. Vanderkelen wrote 11 prescriptions for Oxycodone-Acetaminophen, about 12% as often as the typical South Carolina prescriber of it (92). Medicare paid $7.30 per fill, versus $42.60 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. Vanderkelen’s prescriptions
What does Dr. Vanderkelen prescribe most?
In 2024 Medicare Part D data, Dr. Vanderkelen's most prescribed medications were Atorvastatin Calcium (102), Amlodipine Besylate (73) and Losartan Potassium (44).
How does Dr. Vanderkelen's prescribing compare with other South Carolina prescribers?
Of the 40 medications with a state comparison, Dr. Vanderkelen prescribes 1 about as often than the typical South Carolina prescriber and 39 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Vanderkelen 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 South Carolina 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.
