Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARTINA LYDIA KRENZER MD
Prescription History 1972189355
Hospitalist in Greenwich, CT

Active since March 24, 2021PECOS Enrolled
5 PERRYRIDGE RD, GREENWICH, CT 06830(203) 863-3840(203) 863-4738 Get Directions

NPPES record last updated: September 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 24, 2026, Jan 5, 2022, Mar 24, 2021 (3 updates tracked since 2021).

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for MARTINA LYDIA KRENZER MD, an active Hospitalist specialist practicing in Greenwich, CT. Our medical registry currently tracks 1 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 13 documented patient claims. Among these therapy options, the most frequently utilized medication is Amlodipine Besylate, 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.

1
Medication
13
Total Claims
15
30-Day Fills
Amlodipine Besylate
Most Prescribed · 13 claims
View details
1 medication · 2024 Medicare Part D
Medicare Part D medications prescribed by MARTINA LYDIA KRENZER MD in 2024, with prescription volumes, average cost per fill, and CT state comparisons
Medication Prescriptions (2024)Rx (2024) Avg Cost per FillCost / Fill Vs. Other CT PrescribersVs. CT Avg
Amlodipine Besylate13$3.07▼ below CT avg▼ Less than typical

About Amlodipine Besylate: Amlodipine is used with or without other medications to treat high blood pressure. Show more ▾

Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Amlodipine belongs to a class of drugs known as calcium channel blockers. It works by relaxing blood vessels so blood can flow more easily. Amlodipine is also used to prevent certain types of chest pain (angina). It may help to increase your ability to exercise and decrease the frequency of angina attacks. It should not be used to treat attacks of chest pain when they occur. Use other medications (such as sublingual nitroglycerin) to relieve attacks of chest pain as directed by your doctor. A long-acting dihydropyridine calcium channel blocker. It is effective in the treatment of ANGINA PECTORIS and HYPERTENSION.

In 2024, this provider wrote 13 Medicare prescriptions for Amlodipine Besylate, about 9% of the volume of the typical Connecticut prescriber of this medication (145.2). Medicare paid an average of $3.07 per fill, versus $6.41 statewide.

How often this provider prescribes it

This provider
13
CT average
145.2

This provider prescribes this medication less often than the average CT prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$3.07
CT average
$6.41

This provider's average cost per fill is below the CT average for this medication.

15
30-Day Fills
standardized to 30-day supplies
448
Days of Medication
total across all patients in 2024
No medications match the current filters.
▲ More than typical≈ Typical▼ Less than typical= prescription volume vs the average CT prescriber of the same medication; volume reflects practice size as well as clinical preference.Green cost= below the CT average cost per fill.

About this data. The prescription history for MARTINA LYDIA KRENZER 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 Hospitalist prescribing approach at this Greenwich, CT 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 CT 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.