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Emergency Medicine

Lazaros Yiannos, MD

Works at hospitals in New Britain, CT · Connecticut

Summary

Dr. Lazaros Yiannos, MD is an emergency medicine doctor at 100 Grand St, New Britain, CT 06052. Accepts Medicare assignment. In 2024, Lazaros Yiannos had 260 Original Medicare patients and 295 services. NPI 1912310962. 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: Emergency medicine doctor (Medicare lists Emergency Medicine)
  • Address: 100 Grand St, New Britain, CT 06052 · Directions
  • Medicare: Accepts Medicare assignment
  • Hospital: The Hospital of Central Connecticut
  • Group practice: The Hospital of Central Connecticut at New Britain General and Bradley
  • Medical school: Wayne State University School Of Medicine · graduated 2014 (12 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Lazaros Yiannos, 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 Lazaros Yiannos accept Medicare assignment?
Yes. Medicare's clinician data says Lazaros Yiannos 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 Lazaros Yiannos see?
In 2024, CMS data shows 260 Original Medicare patients and 295 services for Lazaros Yiannos. This counts Original Medicare only and measures volume, not quality.
What is Lazaros Yiannos's NPI number?
1912310962. 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 Lazaros Yiannos, 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 patients260
Services billed to Medicare295
Different services or procedures18
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Emergency department visit with high level of medical decision making (99285)180 services
  2. Emergency department visit with moderate level of medical decision making (99284)46 services
  3. Critical care, first 30-74 minutes (99291)29 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%
  • Anxiety52%
  • Arthritis47%
  • Depression45%
  • Ischemic heart disease44%

Hospitals where Lazaros Yiannos works

Medicare's Facility Affiliation Data lists Lazaros Yiannos 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 Lazaros Yiannos is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

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

  • The Hospital of Central Connecticut at New Britain General and Bradley399 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Connecticut →

Other emergency medicine doctors in New Britain

Clinicians with the same Medicare primary specialty in New Britain, CT — not a recommendation.

All emergency medicine doctors in New Britain →

Other clinicians in The Hospital of Central Connecticut at New Britain General and Bradley

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

Clinician information

CredentialMD
Medical schoolWayne State University School Of Medicine
Graduation year2014 (12 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1912310962
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