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

DR. MADELIN FENIANOS MD
Prescription History 1760019749
Internal Medicine - Pulmonary Disease in New Haven, CT

Active since March 27, 2020PECOS Enrolled
20 YORK ST, NEW HAVEN, CT 06510(203) 688-4242 Get Directions

NPPES record last updated: October 29, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Oct 29, 2026, Mar 27, 2020 (2 updates tracked since 2020).

What does Dr. Fenianos prescribe?

In 2024, Dr. Fenianos wrote 219 Medicare prescriptions for 8 medications. The most prescribed was Albuterol Sulfate Hfa (albuterol sulfate), with 58 prescriptions for 18 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. Fenianos prescribes.

8 medications · 2024 Medicare Part D

Medications 8 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 Connecticut prescribers.

Questions about Dr. Fenianos’s prescriptions

What does Dr. Fenianos prescribe most?

In 2024 Medicare Part D data, Dr. Fenianos's most prescribed medications were Albuterol Sulfate Hfa (58), Trelegy Ellipta (43) and Montelukast Sodium (33).

How does Dr. Fenianos's prescribing compare with other Connecticut prescribers?

Of the 8 medications with a state comparison, Dr. Fenianos prescribes 1 about as often than the typical Connecticut prescriber and 7 less often. Volume reflects practice size as well as prescribing habits.

Does this list show every medication Dr. Fenianos 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.

SourceWhat it provides hereData year
CMS Medicare Part D Prescribers by Provider and DrugEach medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the Connecticut 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 DashboardWhat 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.