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

Internal Medicine

Lawrence D. Belletti, MD

Works at hospitals in Manhasset, NY · New York

Summary

Dr. Lawrence D. Belletti, MD is an internal medicine doctor at 1111 Marcus Ave, New Hyde Park, NY 11042. Phone: (516) 562-2229. Accepts Medicare assignment. In 2024, Lawrence D. Belletti had 145 Original Medicare patients and 433 services. NPI 1609967363. 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: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1111 Marcus Ave, New Hyde Park, NY 11042 · Directions (4 more locations)
  • Phone: (516) 562‑2229
  • Medicare: Accepts Medicare assignment
  • Hospital: North Shore University Hospital
  • Group practice: North Shore-Lij Medical PC
  • Medical school: Georgetown University School Of Medicine · graduated 2003 (23 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Lawrence D. Belletti, 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 Lawrence D. Belletti accept Medicare assignment?
Yes. Medicare's clinician data says Lawrence D. Belletti 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 Lawrence D. Belletti see?
In 2024, CMS data shows 145 Original Medicare patients and 433 services for Lawrence D. Belletti. This counts Original Medicare only and measures volume, not quality.
What is Lawrence D. Belletti's NPI number?
1609967363. 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 Lawrence D. Belletti, 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 patients145
Services billed to Medicare433
Different services or procedures4
Participating Medicare providerYes
Average age of these patients76

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)206 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)153 services
  3. Hospital discharge day management, more than 30 minutes (99239)61 services
  4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)13 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%
  • Arthritis69%
  • Chronic kidney disease61%
  • Diabetes59%
  • Ischemic heart disease59%

Hospitals where Lawrence D. Belletti works

Medicare's Facility Affiliation Data lists Lawrence D. Belletti 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.

  • North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106

Practice locations

Addresses where Lawrence D. Belletti is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Lawrence D. Belletti as a member of this group (CMS data updated October 2, 2026).

  • North Shore-Lij Medical PC6,440 clinicians in the group

Specialties

Find other Internal Medicine doctors in New York →

Other internal medicine doctors in New Hyde Park

Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.

All internal medicine doctors in New Hyde Park →

Other clinicians in North Shore-Lij Medical PC

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

Clinician information

CredentialMD
Medical schoolGeorgetown University School Of Medicine
Graduation year2003 (23 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1609967363
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