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JOHN K ZAWACKI M.D.
NPI 1215910427
Internal Medicine - Gastroenterology in Worcester, MA

Active since November 22, 2005
55 LAKE AVE N, DEPARTMENT OF GASTROENTEROLOGY, WORCESTER, MA 01655(508) 856-3069 Get Directions Write a Review

NPPES record last updated: October 30, 2020. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About John K Zawacki M.d. NPPES

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

JOHN K ZAWACKI M.D. (NPI 1215910427) is an individual gastroenterology provider in Worcester, Massachusetts, licensed in Massachusetts (57172) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1215910427
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameJOHN K ZAWACKICredential: M.D.
Location Address55 LAKE AVE N, DEPARTMENT OF GASTROENTEROLOGYWorcester, MA 01655-0002
Mailing AddressPo Box 415348Boston, MA 02241-5348
Phone(508) 856-3069
Sole ProprietorNo
Enumeration DateNovember 22, 2005
Last NPPES UpdateOctober 30, 2020
NPPES CertifiedOctober 30, 2020
✔ NPI 1215910427 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 MA · 57172
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.
55 LAKE AVE N, Worcester, MA 01655
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Other Identifiers 1

Medicaid110036247AMA

Other Providers at the Same Location NPPES 20

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

HILLARY R. IRONS MD
Emergency Medicine
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 421-1400
MS. EILEEN A. DUHAMEL NP
Nurse Practitioner
55 LAKE AVE N, DEPARTMENT OF RADIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-2710
EWA HRYNISZYN CRNA
Nurse Anesthetist, Certified Registered
55 LAKE AVE N, DEPARTMENT OF ANESTHESIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-3271
HELEN COPSEY PA-C
Physician Assistant
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-8585
DR. ADEPEJU GBADEBO CHAMPION M.D.
Internal Medicine
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-2731
SOWMYA KORAPATI
Internal Medicine (Hematology & Oncology)
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-3550
LAYLA FAKHRZADEH M.D.
Anesthesiology
55 LAKE AVE N, ANESTHESIOLOGY
WORCESTER, MA 01655
Worcester County (508) 334-3271
YOONYIE CHO M.D.
Anesthesiology
55 LAKE AVE N
WORCESTER, MA 01655
Worcester County (508) 334-1000

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 John Zawacki's NPI number?

The NPI number for John Zawacki is 1215910427. It was assigned to this individual provider in the NPPES registry on November 22, 2005.

Where is John Zawacki located?

John Zawacki practices at 55 Lake Ave N Department Of Gastroenterology, Worcester, MA 01655. The listed phone number is (508) 856-3069.

What is John Zawacki's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for John Zawacki was last updated on October 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.