Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Cardiac Surgery

Antonia Kreso, MD

Works at hospitals in Boston, MA · Newton, MA · Massachusetts

Summary

Dr. Antonia Kreso, MD is a cardiac surgeon at 55 Fruit St, Boston, MA 02114. Phone: (617) 724-0287. Accepts Medicare assignment. In 2024, Antonia Kreso had 133 Original Medicare patients and 349 services. NPI 1225489115. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Cardiac surgeon (Medicare lists Cardiac Surgery)
  • Address: 55 Fruit St, Boston, MA 02114 · Directions
  • Phone: (617) 724‑0287
  • Medicare: Accepts Medicare assignment
  • Hospitals: Massachusetts General Hospital, Newton-Wellesley Hospital
  • Group practice: Massachusetts General Physicians Organization Inc
  • Medical school: University Of Toronto, Faculty Of Medicine · graduated 2016 (10 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Antonia Kreso, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Antonia Kreso accept Medicare assignment?
Yes. Medicare's clinician data says Antonia Kreso accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Antonia Kreso see?
In 2024, CMS data shows 133 Original Medicare patients and 349 services for Antonia Kreso. This counts Original Medicare only and measures volume, not quality.
What is Antonia Kreso's NPI number?
1225489115. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Antonia Kreso, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients133
Services billed to Medicare349
Different services or procedures64
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)47 services
  2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)42 services
  3. Harvest of vein using an endoscope (33508)39 services
  4. Coronary artery bypass using artery graft, 1 graft (33533)39 services
  5. Coronary artery bypass using vein or artery graft, 3 grafts (33519)15 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Ischemic heart disease75%
  • Heart failure71%
  • Atrial fibrillation51%
  • Chronic kidney disease50%

Hospitals where Antonia Kreso works

Medicare's Facility Affiliation Data lists Antonia Kreso at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Antonia Kreso is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Antonia Kreso as a member of this group (CMS data updated October 2, 2026).

  • Massachusetts General Physicians Organization Inc3,558 clinicians in the group

Specialties

Find other Cardiac Surgery doctors in Massachusetts →

Other cardiac surgeons in Boston

Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.

All cardiac surgeons in Boston →

Other clinicians in Massachusetts General Physicians Organization Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Toronto, Faculty Of Medicine
Graduation year2016 (10 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1225489115
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians