Mark Edward Alexander, MD

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

• Boston Children'S Hospital Hospital · Boston, MA · listed as Children's Hospital Boston
• Brigham And Women'S Hospital Hospital · Boston, MA

Colleagues at Boston Childrens Heart Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 99 clinicians in the practice; 12 are shown here.

• Roger Breitbart, MD Pediatric Cardiology Physician · Boston, MA
• Dr. Kevin Patrick Daly, MD Pediatric Cardiology Physician · Boston, MA
• Robert Geggel, MD Pediatrics Physician · Boston, MA
• Tal Geva, MD Pediatrics Physician · Boston, MA
• Michelle Z Gurvitz, MD Cardiovascular Disease Physician · Boston, MA
• Dr. Michael Job Landzberg, MD Specialist · Boston, MA
• Amrit Misra Adult Congenital Heart Disease Physician · Boston, MA
• Dr. Diego Porras Ingouville, MD Pediatric Cardiology Physician · Boston, MA
• Dr. Rahul Hardas Rathod, MD Pediatric Cardiology Physician · Boston, MA
• Dr. Francesca Sperotto, MD Pediatric Cardiology Physician · Boston, MA
• Dr. Julia Kathryn Weld, DO Pediatrics Physician · Boston, MA
• Ryan J Williams, MD Pediatric Cardiology Physician · Boston, MA

Other providers in Scarborough

• Jon Patrick Donnelly, MD

  Individual Pediatric Cardiology Physician · NPI 1023102456

  71 US Route 1 Ste C, Scarborough, ME 04074-7173 · (207) 883-5532

• Mary Elizabeth Hourihan, MD

  Individual Pediatric Cardiology Physician · NPI 1346336880

  71 US Route 1 Ste C, Scarborough, ME 04074-7173 · (207) 883-5532

• Pediatric Cardiology Assoc PA

  Organization Pediatric Cardiology Physician · NPI 1346311925

  71 US Route 1 Ste C, Scarborough, ME 04074-7173 · (207) 883-5532

• Dr. Alan Frederick Keohane Riley, MD

  Individual Pediatric Cardiology Physician · NPI 1447435672

  71 US Route 1 Ste C, Scarborough, ME 04074-7174 · (207) 883-5532