1. Home
  2. Directory
  3. New York
  4. Amherst
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. LESTER S SIELSKI M.D
NPI 1669424081
Internal Medicine in Amherst, NY

Active since May 16, 2006
4239 MAPLE RD, AMHERST, NY 14226(716) 835-2984(716) 835-1470 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 13, 2026, Nov 5, 2021 (2 updates tracked since 2021).

About Dr. Lester S Sielski M.d NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LESTER S SIELSKI M.D (NPI 1669424081) is an individual internal medicine provider in Amherst, New York, licensed in New York (106124) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1669424081
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. LESTER S SIELSKICredential: M.D
Location Address4239 MAPLE RDAmherst, NY 14226-1039
Mailing Address4239 Maple RdAmherst, NY 14226-1039 · (716) 835-2984 · Fax (716) 835-1470
Phone(716) 835-2984
Fax(716) 835-1470
Sole ProprietorNo
Enumeration DateMay 16, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1669424081 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 106124
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
4239 MAPLE RD, Amherst, NY 14226
Open in Google Maps ↗

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JOSEPH DONALD GENTILE MD
Internal Medicine
4239 MAPLE RD
AMHERST, NY 14226
Erie County (716) 832-9747
LESTER S SIELSKI MD PC
Internal Medicine
4239 MAPLE RD
AMHERST, NY 14226
Erie County (716) 835-2984
JOSEPH D GENTILE MD PC
Clinic/Center (Medical Specialty)
4239 MAPLE RD
AMHERST, NY 14226
Erie County (716) 832-9747

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Lester Sielski's NPI number?

The NPI number for Lester Sielski is 1669424081. It was assigned to this individual provider in the NPPES registry on May 16, 2006.

Where is Lester Sielski located?

Lester Sielski practices at 4239 Maple Rd, Amherst, NY 14226. The listed phone number is (716) 835-2984.

What is Lester Sielski's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Lester Sielski was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.