NALLATHAMBY THAYAPRAN M.D.
Prescription History 1386740421
Internal Medicine - Interventional Cardiology in Porterville, CA
What does Dr. Thayapran prescribe?
In 2024, Dr. Thayapran wrote 2,949 Medicare prescriptions for 41 medications. The most prescribed was Atorvastatin Calcium, with 267 prescriptions for 91 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. Thayapran prescribes.
Medications 41 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 California 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 California prescribers
Dr. Thayapran wrote 267 prescriptions for Atorvastatin Calcium, about 1.3 times as often as the typical California prescriber of it (202). Medicare paid $9.54 per fill, versus $10.47 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
Clopidogrel is used to prevent heart attacks and strokes in persons with heart disease (recent heart attack), recent stroke, or blood circulation disease (peripheral vascular disease).
Compared with California prescribers
Dr. Thayapran wrote 215 prescriptions for Clopidogrel, about 4.4 times as often as the typical California prescriber of it (48). Medicare paid $12.07 per fill, versus $12.42 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 California prescribers
Dr. Thayapran wrote 214 prescriptions for Lisinopril, about 2.2 times as often as the typical California prescriber of it (98). Medicare paid $7.00 per fill, versus $8.30 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
Apixaban is used to prevent serious blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip/knee replacement surgery.
Compared with California prescribers
Dr. Thayapran wrote 203 prescriptions for Eliquis, about 2.8 times as often as the typical California prescriber of it (73). Medicare paid $1,209.22 per fill, versus $923.33 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
This medication is used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Thayapran wrote 165 prescriptions for Cephalexin, about 5.5 times as often as the typical California prescriber of it (30). Medicare paid $3.25 per fill, versus $7.62 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
Carvedilol is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Thayapran wrote 130 prescriptions for Carvedilol, about 2.3 times as often as the typical California prescriber of it (56). Medicare paid $8.97 per fill, versus $8.98 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 California prescribers
Dr. Thayapran wrote 130 prescriptions for Hydrochlorothiazide, about 2.1 times as often as the typical California prescriber of it (62). Medicare paid $5.91 per fill, versus $5.71 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
Metoprolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 127 prescriptions for Metoprolol Tartrate, about 2.2 times as often as the typical California prescriber of it (57). Medicare paid $6.31 per fill, versus $7.82 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
Diltiazem is used to treat high blood pressure (hypertension) and prevent chest pain (angina).
Compared with California prescribers
Dr. Thayapran wrote 125 prescriptions for Diltiazem 24hr Er (Cd), about 4.5 times as often as the typical California prescriber of it (28). Medicare paid $37.29 per fill, versus $32.58 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 California prescribers
Dr. Thayapran wrote 115 prescriptions for Losartan Potassium, about as often as the typical California prescriber of it (121). Medicare paid $13.30 per fill, versus $10.35 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 California prescribers
Dr. Thayapran wrote 112 prescriptions for Furosemide, about 1.7 times as often as the typical California prescriber of it (64). Medicare paid $4.76 per fill, versus $6.39 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 alone or with other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 103 prescriptions for Clonidine Hcl, about 2.9 times as often as the typical California prescriber of it (35). Medicare paid $9.61 per fill, versus $6.25 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
Atenolol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 83 prescriptions for Atenolol, about 1.7 times as often as the typical California prescriber of it (50). Medicare paid $6.07 per fill, versus $9.20 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
Cilostazol is used to improve the symptoms of a certain blood flow problem in the legs (intermittent claudication).
Compared with California prescribers
Dr. Thayapran wrote 80 prescriptions for Cilostazol, about 3 times as often as the typical California prescriber of it (27). Medicare paid $20.73 per fill, versus $19.81 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 blood clots (such as in deep vein thrombosis-DVT or pulmonary embolus-PE) and/or to prevent new clots from forming in your body.
Compared with California prescribers
Dr. Thayapran wrote 76 prescriptions for Warfarin Sodium, about 1.9 times as often as the typical California prescriber of it (40). Medicare paid $7.12 per fill, versus $11.33 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
Amlodipine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Thayapran wrote 75 prescriptions for Amlodipine Besylate, about half as often as the typical California prescriber of it (141). Medicare paid $7.32 per fill, versus $7.08 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
Rivaroxaban is used to prevent blood clots from forming due to a certain irregular heartbeat (atrial fibrillation) or after hip or knee replacement surgery.
Compared with California prescribers
Dr. Thayapran wrote 72 prescriptions for Xarelto, about 1.7 times as often as the typical California prescriber of it (43). Medicare paid $1,447.92 per fill, versus $952.66 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
Ticagrelor is used along with low-dose aspirin to help prevent heart attack and stroke in people with a history of heart disease, stroke, or at increased risk for heart disease or stroke (for example, due to diabetes, history of transient ischemic attack-TIA).
Compared with California prescribers
Dr. Thayapran wrote 57 prescriptions for Brilinta, about 1.9 times as often as the typical California prescriber of it (30). Medicare paid $848.62 per fill, versus $652.78 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
This medication is used to treat certain types of serious (possibly fatal) irregular heartbeat (such as recurrent ventricular fibrillation/tachycardia).
Compared with California prescribers
Dr. Thayapran wrote 54 prescriptions for Amiodarone Hcl, about 1.3 times as often as the typical California prescriber of it (43). Medicare paid $28.67 per fill, versus $30.86 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
Spironolactone is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Thayapran wrote 52 prescriptions for Spironolactone, about 1.4 times as often as the typical California prescriber of it (37). Medicare paid $8.96 per fill, versus $10.05 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 California prescribers
Dr. Thayapran wrote 45 prescriptions for Metoprolol Succinate, about half as often as the typical California prescriber of it (86). Medicare paid $14.11 per fill, versus $14.23 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
Diltiazem is used to prevent chest pain (angina).
Compared with California prescribers
Dr. Thayapran wrote 43 prescriptions for Diltiazem Hcl, about 1.9 times as often as the typical California prescriber of it (22). Medicare paid $22.53 per fill, versus $25.17 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 California prescribers
Dr. Thayapran wrote 37 prescriptions for Entresto, about 65% as often as the typical California prescriber of it (57). Medicare paid $1,177.58 per fill, versus $1,043.51 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 California prescribers
Dr. Thayapran wrote 34 prescriptions for Rosuvastatin Calcium, about 34% as often as the typical California prescriber of it (101). Medicare paid $16.27 per fill, versus $15.64 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
Digoxin is used to treat heart failure, usually along with other medications.
Compared with California prescribers
Dr. Thayapran wrote 33 prescriptions for Digoxin, about as often as the typical California prescriber of it (29). Medicare paid $20.96 per fill, versus $22.84 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
Hydralazine is used with or without other medications to treat high blood pressure.
Compared with California prescribers
Dr. Thayapran wrote 30 prescriptions for Hydralazine Hcl, about 70% as often as the typical California prescriber of it (43). Medicare paid $19.55 per fill, versus $14.35 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 relieve chest pain (angina) in people that have a certain heart condition (coronary artery disease).
Compared with California prescribers
Dr. Thayapran wrote 26 prescriptions for Nitroglycerin, about 78% as often as the typical California prescriber of it (33). Medicare paid $17.90 per fill, versus $15.75 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 California prescribers
Dr. Thayapran wrote 24 prescriptions for Isosorbide Mononitrate Er, about 69% as often as the typical California prescriber of it (35). Medicare paid $7.41 per fill, versus $14.01 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
This drug is used to treat high blood pressure.
Compared with California prescribers
Dr. Thayapran wrote 22 prescriptions for Losartan-Hydrochlorothiazide, about half as often as the typical California prescriber of it (39). Medicare paid $18.41 per fill, versus $13.09 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
Valsartan is used to treat high blood pressure and heart failure.
Compared with California prescribers
Dr. Thayapran wrote 22 prescriptions for Valsartan, about half as often as the typical California prescriber of it (39). Medicare paid $24.63 per fill, versus $28.57 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 used to treat certain types of serious (possibly fatal) irregular heartbeat (such as sustained ventricular tachycardia and paroxysmal supraventricular tachycardia).
Compared with California prescribers
Dr. Thayapran wrote 20 prescriptions for Flecainide Acetate, about half as often as the typical California prescriber of it (46). Medicare paid $67.90 per fill, versus $42.81 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 California prescribers
Dr. Thayapran wrote 20 prescriptions for Jardiance, about 35% as often as the typical California prescriber of it (58). Medicare paid $1,331.62 per fill, versus $933.82 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
Labetalol is used with or without other medications to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 18 prescriptions for Labetalol Hcl, about 73% as often as the typical California prescriber of it (25). Medicare paid $34.09 per fill, versus $29.18 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
Benazepril is used to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 17 prescriptions for Benazepril Hcl, about half as often as the typical California prescriber of it (35). Medicare paid $18.05 per fill, versus $11.17 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 California prescribers
Dr. Thayapran wrote 17 prescriptions for Ezetimibe, about 33% as often as the typical California prescriber of it (51). Medicare paid $63.96 per fill, versus $26.00 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
Nifedipine is used alone or in combination with other drugs to treat high blood pressure (hypertension).
Compared with California prescribers
Dr. Thayapran wrote 17 prescriptions for Nifedipine Er, about half as often as the typical California prescriber of it (32). Medicare paid $90.52 per fill, versus $28.64 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 California prescribers
Dr. Thayapran wrote 16 prescriptions for Potassium Chloride, about 34% as often as the typical California prescriber of it (48). Medicare paid $49.51 per fill, versus $24.00 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
Simvastatin 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 California prescribers
Dr. Thayapran wrote 15 prescriptions for Simvastatin, about 24% as often as the typical California prescriber of it (63). Medicare paid $4.85 per fill, versus $9.03 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
Diltiazem is used to treat high blood pressure (hypertension) and prevent chest pain (angina).
Compared with California prescribers
Dr. Thayapran wrote 13 prescriptions for Diltiazem 24hr Er, about 67% as often as the typical California prescriber of it (19). Medicare paid $70.95 per fill, versus $32.74 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
Enalapril is used to treat high blood pressure.
Compared with California prescribers
Dr. Thayapran wrote 13 prescriptions for Enalapril Maleate, about half as often as the typical California prescriber of it (25). Medicare paid $11.73 per fill, versus $16.17 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 California prescribers
Dr. Thayapran wrote 12 prescriptions for Gabapentin, about 15% as often as the typical California prescriber of it (80). Medicare paid $13.30 per fill, versus $15.63 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. Thayapran’s prescriptions
What does Dr. Thayapran prescribe most?
In 2024 Medicare Part D data, Dr. Thayapran's most prescribed medications were Atorvastatin Calcium (267), Clopidogrel (215) and Lisinopril (214).
How does Dr. Thayapran's prescribing compare with other California prescribers?
Of the 41 medications with a state comparison, Dr. Thayapran prescribes 19 more often than the typical California prescriber, 3 about as often and 19 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Thayapran 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 California 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.
