Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. HENRY KLOS III MD
NPI 1649899956
Internal Medicine - Gastroenterology in Buffalo, NY

Active since April 16, 2020
1091 MAIN ST STE 301, BUFFALO, NY 14209(716) 626-2644 Get Directions Write a Review

NPPES record last updated: July 17, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 17, 2026, Apr 16, 2020 (2 updates tracked since 2020).

About Dr. Henry Klos Iii Md NPPES

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

DR. HENRY KLOS III MD (NPI 1649899956) is an individual gastroenterology provider in Buffalo, New York, licensed in New York (343169) and active in the NPI registry since April 2020. He maintains a secondary practice location in Williamsville.

NPPES Registry Identity

NPI1649899956
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. HENRY KLOS IIICredential: MD
Location Address1091 MAIN ST STE 301Buffalo, NY 14209-2398
Mailing Address462 Grider StBuffalo, NY 14215-3021 · (716) 898-3941 · Fax (716) 898-3279
Sole ProprietorNo
Enumeration DateApril 16, 2020
Last NPPES UpdateJuly 17, 20262 updates tracked since enumeration
NPPES CertifiedJuly 17, 2026
NPI 1649899956 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License Licensed in NY · 343169
Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

1091 MAIN ST STE 301, Buffalo, NY 14209

Secondary Practice Location 1

Location 1111 N Maplemere Rd Ste 200Williamsville, NY 14221-3182 · Phone (716) 626-2644

Other Providers at the Same Location NPPES 8

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

Nurse Practitioner (Family)
1091 MAIN ST STE 301
BUFFALO, NY 14209
Internal Medicine
1091 MAIN ST STE 301
BUFFALO, NY 14209
Family Medicine
1091 MAIN ST STE 301
BUFFALO, NY 14209
Nurse Practitioner (Adult Health)
1091 MAIN ST STE 301
BUFFALO, NY 14209
Nurse Practitioner (Adult Health)
1091 MAIN ST STE 301
BUFFALO, NY 14209
Nurse Practitioner (Family)
1091 MAIN ST STE 301
BUFFALO, NY 14209
Obstetrics & Gynecology
1091 MAIN ST STE 301
BUFFALO, NY 14209
Physician Assistant (Medical)
1091 MAIN ST STE 301
BUFFALO, NY 14209

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1649899956, enumerated as an "individual" on April 16, 2020.

The provider is located at 1091 MAIN ST STE 301 BUFFALO, NY 14209 and the phone number is (716) 626-2644.

Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.