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General Surgery

Lisa S. Wiechmann, MD

Works at hospitals in New York, NY · New York

Summary

Dr. Lisa S. Wiechmann, MD is a general surgeon at 1111 Westchester Ave, West Harrison, NY 10604. Phone: (914) 327-2700. Accepts Medicare assignment. In 2024, Lisa S. Wiechmann had 123 Original Medicare patients and 231 services. NPI 1942460365. 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: General surgeon (Medicare lists General Surgery)
  • Address: 1111 Westchester Ave, West Harrison, NY 10604 · Directions (3 more locations)
  • Phone: (914) 327‑2700
  • Medicare: Accepts Medicare assignment
  • Hospital: New York-Presbyterian Hospital
  • Group practice: Trustees of Columbia University in the City of New York
  • Medical school: graduated 1999 (27 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 Lisa S. Wiechmann, 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 Lisa S. Wiechmann accept Medicare assignment?
Yes. Medicare's clinician data says Lisa S. Wiechmann 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 Lisa S. Wiechmann see?
In 2024, CMS data shows 123 Original Medicare patients and 231 services for Lisa S. Wiechmann. This counts Original Medicare only and measures volume, not quality.
What is Lisa S. Wiechmann's NPI number?
1942460365. 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 Lisa S. Wiechmann, 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 patients123
Services billed to Medicare231
Different services or procedures18
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)128 services
  2. Partial removal of breast (19301)21 services
  3. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)18 services
  4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)12 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 cholesterol75%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)71%
  • High blood pressure59%
  • Arthritis45%
  • Osteoporosis37%
  • Anxiety24%

Hospitals where Lisa S. Wiechmann works

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

Group practices

Medicare enrollment lists Lisa S. Wiechmann as a member of this group (CMS data updated October 2, 2026).

  • Trustees of Columbia University in the City of New York2,296 clinicians in the group

Specialties

Find other General Surgery doctors in New York →

Other general surgeons in New York

Clinicians with the same Medicare primary specialty in New York — not a recommendation.

All general surgeons in New York →

Other clinicians in Trustees of Columbia University in the City of New York

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

Clinician information

CredentialMD
Graduation year1999 (27 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1942460365
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