ALYSSA Y CASTILLO MD
Prescription History 1659752152
Internal Medicine - Infectious Disease in Aurora, CO
Medicare Part D Prescription History
Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for ALYSSA Y CASTILLO MD, an active Infectious Disease specialist practicing in Aurora, CO. Our medical registry currently tracks 4 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 48 documented patient claims. Among these therapy options, the most frequently utilized medication is Methenamine Hippurate, which accounts for 13 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.
| Medication | Prescriptions (2024)Rx (2024) | Avg Cost per FillCost / Fill | Vs. Other CO PrescribersVs. CO Avg |
|---|---|---|---|
| Methenamine Hippurate | 13 | $85.69 | ▼ Less than typical |
About Methenamine Hippurate: Methenamine is used to prevent or control returning urinary tract infections caused by certain bacteria. Show more ▾ It is not used to treat an active infection. Antibiotics must be used first to treat and cure the infection. Methenamine is a drug that stops the growth of bacteria in urine. This medication also contains an ingredient that helps to make the urine acidic. When the urine is acidic, methenamine turns into formaldehyde to kill the bacteria. This drug is effective only against bacterial infections in the urinary tract. It will not work for other types of bacterial infections (such as in the blood) or for viral infections (such as the common cold or flu). Unnecessary use or misuse of any antibacterial drug can lead to its decreased effectiveness. Both parts of molecule contribute to its antibacterial action. In 2024, this provider wrote 13 Medicare prescriptions for Methenamine Hippurate, about half the volume of the typical Colorado prescriber of this medication (29.2). Medicare paid an average of $85.69 per fill, versus $74.59 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CO prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 15 30-Day Fills standardized to 30-day supplies 450 Days of Medication total across all patients in 2024 | |||
| Piperacillin-TazobactamPiperacillin Sodium/Tazobactam | 12 | $139.31 | – No State Data |
About Piperacillin-Tazobactam: Piperacillin/tazobactam is used to treat a wide variety of bacterial infections. Show more ▾ It is a penicillin antibiotic. It works by stopping the growth of bacteria. An antibiotic combination product of piperacillin and tazobactam, a penicillanic acid derivative with enhanced beta-lactamase inhibitory activity, that is used for the intravenous treatment of intra-abdominal, pelvic, and skin infections and for community-acquired pneumonia of moderate severity. It is also used for the treatment of PSEUDOMONAS AERUGINOSA INFECTIONS. In 2024, this provider wrote 12 Medicare prescriptions for Piperacillin-Tazobactam. Medicare paid an average of $139.31 per fill. No state comparison is available for this medication. How often this provider prescribes it No state benchmark is available for this medication. What Medicare paid per fill $139.31 Cost per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 12 30-Day Fills standardized to 30-day supplies 83 Days of Medication total across all patients in 2024 | |||
| Rifampin | 12 | $77.66 | ▼ Less than typical |
About Rifampin: This medication is used to prevent and treat tuberculosis and other bacterial infections. Show more ▾ Rifampin belongs to a class of drugs known as rifamycin antibiotics. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections. A semisynthetic antibiotic produced from Streptomyces mediterranei. It has a broad antibacterial spectrum, including activity against several forms of Mycobacterium. In susceptible organisms it inhibits DNA-dependent RNA polymerase activity by forming a stable complex with the enzyme. It thus suppresses the initiation of RNA synthesis. Rifampin is bactericidal, and acts on both intracellular and extracellular organisms. (From Gilman et al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 9th ed, p1160) In 2024, this provider wrote 12 Medicare prescriptions for Rifampin, about 70% of the volume of the typical Colorado prescriber of this medication (17.2). Medicare paid an average of $77.66 per fill, versus $68.36 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CO prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 14 30-Day Fills standardized to 30-day supplies 418 Days of Medication total across all patients in 2024 | |||
| Amoxicillin | 11 | $19.84 | ▼ Less than typical |
About Amoxicillin: Amoxicillin is used to treat a wide variety of bacterial infections. Show more ▾ This medication is a penicillin-type antibiotic. It works by stopping the growth of bacteria. This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections. Amoxicillin is also used with other medications to treat stomach/intestinal ulcers caused by the bacteria H. pylori and to prevent the ulcers from returning. A broad-spectrum semisynthetic antibiotic similar to AMPICILLIN except that its resistance to gastric acid permits higher serum levels with oral administration. In 2024, this provider wrote 11 Medicare prescriptions for Amoxicillin, about a third of the volume of the typical Colorado prescriber of this medication (34.4). Medicare paid an average of $19.84 per fill, versus $3.58 statewide. How often this provider prescribes it This provider prescribes this medication less often than the average CO prescriber. Utilization reflects practice size as well as clinical preference. What Medicare paid per fill Gross Part D cost per fill; not the patient's out-of-pocket price. 15 30-Day Fills standardized to 30-day supplies 427 Days of Medication total across all patients in 2024 | |||
About this data. The prescription history for ALYSSA Y CASTILLO MD is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2024, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Infectious Disease prescribing approach at this Aurora, CO practice.
Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average among CO prescribers of the same medication and form, shown only when at least five prescribers contribute. Always confirm current medications and costs directly with the provider and your plan.
About the medication summaries. Drug use descriptions come from the CMS Medicare Part D Drug Spending Dashboard (2024), and substance definitions from Medical Subject Headings (MeSH) 2026, U.S. National Library of Medicine. They are summaries that do not contain all possible information about a medication and are not individual medical advice. Ask a health care professional about any medication and your specific health needs.
