DAVID CHANG ISHIZAWAR M.D.
Prescription History 1326235607
Internal Medicine - Advanced Heart Failure and Transplant Cardiology in Raleigh, NC
What does Dr. Ishizawar prescribe?
In 2024, Dr. Ishizawar wrote 1,880 Medicare prescriptions for 28 medications. The most prescribed was Spironolactone, with 278 prescriptions for 112 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. Ishizawar prescribes.
Medications 28 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 North Carolina prescribers.
What it is used for
Spironolactone is used to treat high blood pressure and heart failure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 278 prescriptions for Spironolactone, about 5.7 times as often as the typical North Carolina prescriber of it (49). Medicare paid $7.93 per fill, versus $7.79 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 North Carolina prescribers
Dr. Ishizawar wrote 275 prescriptions for Jardiance, about 4.9 times as often as the typical North Carolina prescriber of it (56). Medicare paid $1,047.12 per fill, versus $973.00 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 North Carolina prescribers
Dr. Ishizawar wrote 185 prescriptions for Metoprolol Succinate, about 1.7 times as often as the typical North Carolina prescriber of it (108). Medicare paid $23.79 per fill, versus $12.24 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
This product is used to treat certain types of heart failure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 181 prescriptions for Entresto, about 3.2 times as often as the typical North Carolina prescriber of it (56). Medicare paid $1,023.92 per fill, versus $967.10 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
Torsemide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 140 prescriptions for Torsemide, about 3.7 times as often as the typical North Carolina prescriber of it (38). Medicare paid $50.68 per fill, versus $19.94 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
Dapagliflozin is used with a proper diet and exercise program to control high blood sugar in people with type 2 diabetes.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 112 prescriptions for Farxiga, about 2.6 times as often as the typical North Carolina prescriber of it (43). Medicare paid $963.41 per fill, versus $898.18 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 North Carolina prescribers
Dr. Ishizawar wrote 108 prescriptions for Furosemide, about 1.3 times as often as the typical North Carolina prescriber of it (83). Medicare paid $4.93 per fill, versus $4.73 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
Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 88 prescriptions for Losartan Potassium, about 81% as often as the typical North Carolina prescriber of it (108). Medicare paid $6.80 per fill, versus $9.16 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
Carvedilol is used to treat high blood pressure and heart failure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 83 prescriptions for Carvedilol, about 1.3 times as often as the typical North Carolina prescriber of it (63). Medicare paid $11.43 per fill, versus $7.93 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
Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 58 prescriptions for Sildenafil Citrate, about 3.1 times as often as the typical North Carolina prescriber of it (19). Medicare paid $465.65 per fill, versus $67.43 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 North Carolina prescribers
Dr. Ishizawar wrote 45 prescriptions for Potassium Chloride, about 70% as often as the typical North Carolina prescriber of it (64). Medicare paid $28.55 per fill, versus $17.71 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
Macitentan is used to treat high blood pressure in the lungs (pulmonary arterial hypertension).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 42 prescriptions for Opsumit, about 66% as often as the typical North Carolina prescriber of it (64). Medicare paid $12,534.17 per fill, versus $12,691.95 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
Riociguat is used to treat high blood pressure in the lungs (pulmonary hypertension).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 39 prescriptions for Adempas, about as often as the typical North Carolina prescriber of it (40). Medicare paid $13,958.26 per fill, versus $13,517.46 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
Selexipag is used to treat high blood pressure in the lungs (pulmonary arterial hypertension-PAH).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 31 prescriptions for Uptravi, about 66% as often as the typical North Carolina prescriber of it (47). Medicare paid $21,936.00 per fill, versus $23,926.27 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
Ambrisentan is used to treat high blood pressure in the lungs (pulmonary arterial hypertension).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 24 prescriptions for Ambrisentan, about half as often as the typical North Carolina prescriber of it (46). Medicare paid $5,362.09 per fill, versus $2,724.73 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
This medication is used to treat a type of high blood pressure in the lungs (pulmonary arterial hypertension).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 21 prescriptions for Tyvaso Dpi, about half as often as the typical North Carolina prescriber of it (42). Medicare paid $24,401.86 per fill, versus $23,893.69 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
Isosorbide mononitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 20 prescriptions for Isosorbide Mononitrate Er, about half as often as the typical North Carolina prescriber of it (47). Medicare paid $5.77 per fill, versus $11.13 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
Bumetanide is used to reduce extra fluid in the body (edema) caused by conditions such as heart failure, liver disease, and kidney disease.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 17 prescriptions for Bumetanide, about half as often as the typical North Carolina prescriber of it (30). Medicare paid $35.57 per fill, versus $29.66 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
Isosorbide dinitrate is used to prevent chest pain (angina) in patients with a certain heart condition (coronary artery disease).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 16 prescriptions for Isosorbide Dinitrate, about 72% as often as the typical North Carolina prescriber of it (22). Medicare paid $45.83 per fill, versus $55.26 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
Tadalafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 16 prescriptions for Tadalafil, about 63% as often as the typical North Carolina prescriber of it (25). Medicare paid $58.93 per fill, versus $264.97 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 certain type of heart failure (transthyretin-mediated amyloidosis).
Compared with North Carolina prescribers
Dr. Ishizawar wrote 16 prescriptions for Vyndamax, about 37% as often as the typical North Carolina prescriber of it (43). Medicare paid $21,807.57 per fill, versus $23,902.40 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 North Carolina prescribers
Dr. Ishizawar wrote 15 prescriptions for Hydrochlorothiazide, about 19% as often as the typical North Carolina prescriber of it (80). Medicare paid $3.48 per fill, versus $4.14 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
Lisinopril is used to treat high blood pressure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 13 prescriptions for Lisinopril, about 12% as often as the typical North Carolina prescriber of it (110). Medicare paid $5.53 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
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 12 prescriptions for Hydralazine Hcl, about 30% as often as the typical North Carolina prescriber of it (40). Medicare paid $11.45 per fill, versus $12.84 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 North Carolina prescribers
Dr. Ishizawar wrote 12 prescriptions for Rosuvastatin Calcium, about 10% as often as the typical North Carolina prescriber of it (124). Medicare paid $16.50 per fill, versus $11.22 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
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 North Carolina prescribers
Dr. Ishizawar wrote 11 prescriptions for Atorvastatin Calcium, about 6% as often as the typical North Carolina prescriber of it (179). Medicare paid $10.36 per fill, versus $9.41 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 for certain patients who have symptoms of low blood pressure when standing.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 11 prescriptions for Midodrine Hcl, about 41% as often as the typical North Carolina prescriber of it (27). Medicare paid $29.05 per fill, versus $57.47 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
Valsartan is used to treat high blood pressure and heart failure.
Compared with North Carolina prescribers
Dr. Ishizawar wrote 11 prescriptions for Valsartan, about 29% as often as the typical North Carolina prescriber of it (38). Medicare paid $21.38 per fill, versus $23.08 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. Ishizawar’s prescriptions
What does Dr. Ishizawar prescribe most?
In 2024 Medicare Part D data, Dr. Ishizawar's most prescribed medications were Spironolactone (278), Jardiance (275) and Metoprolol Succinate (185).
How does Dr. Ishizawar's prescribing compare with other North Carolina prescribers?
Of the 28 medications with a state comparison, Dr. Ishizawar prescribes 9 more often than the typical North Carolina prescriber, 2 about as often and 17 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Ishizawar 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 North 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.
