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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN J MIZENKO D.O.
NPI 1417958703
Internal Medicine - Gastroenterology in Warrensville Heights, OH

Active since August 09, 2005
4100 WARRENSVILLE CENTER RD, SUITE 203, WARRENSVILLE HEIGHTS, OH 44122(216) 561-0801 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. John J Mizenko D.o. NPPES

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

DR. JOHN J MIZENKO D.O. (NPI 1417958703) is an individual gastroenterology provider in Warrensville Heights, Ohio, licensed in Ohio (34001263M) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1417958703
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. JOHN J MIZENKOCredential: D.O.
Location Address4100 WARRENSVILLE CENTER RD, SUITE 203Warrensville Heights, OH 44122-7024
Mailing Address4100 Warrensville Center Rd, Suite 203Warrensville Heights, OH 44122-7024 · (216) 561-0801
Phone(216) 561-0801
Sole ProprietorNo
Enumeration DateAugust 9, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1417958703 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 OH · 34001263M
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.
4100 WARRENSVILLE CENTER RD, Warrensville Heights, OH 44122
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Other Identifiers 1

Medicaid0089961OH

Other Providers at the Same Location NPPES 11

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

ORTHOPEDIC ASSOCIATES OF N OHIO INC
Ophthalmology
4100 WARRENSVILLE CENTER RD, SUITE 201
WARRENSVILLE HTS, OH 44122
Cuyahoga County (216) 367-1850
RICK GEMMA, D.O., INC.
Surgery
4100 WARRENSVILLE CENTER RD, #202
BEACHWOOD, OH 44122
Cuyahoga County (216) 561-3838
AMY LEIGH KNOWLTON CTRS
Recreation Therapist
4100 WARRENSVILLE CENTER RD, BUILDING A, 4TH FLOOR
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-6073
MERIDIA MEDICAL GROUP, LLC
Specialist
4100 WARRENSVILLE CENTER RD
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 491-7036
ORTHOPEDIC ASSOCIATES OF NORTHERN OH INC
Orthopaedic Surgery
4100 WARRENSVILLE CENTER RD, SUITE 201
WARRENSVILLE HTS, OH 44122
Cuyahoga County (216) 367-1850
ROGER F. CLASSEN, D.O., INC.
Surgery
4100 WARRENSVILLE CENTER RD, SUITE #101
WARRENSVILLE HEIGHTS, OH 44122
Cuyahoga County (216) 561-0111
MR. DAVID H KRAHE DO
Orthopaedic Surgery
4100 WARRENSVILLE CENTER RD, STE 201
CLEVELAND, OH 44122
Cuyahoga County (216) 367-1850
MRS. RICHARD R MASIN DO
Orthopaedic Surgery
4100 WARRENSVILLE CENTER RD, SUITE 201
CLEVELAND, OH 44122
Cuyahoga County (216) 367-1850

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 Mizenko's NPI number?

The NPI number for John Mizenko is 1417958703. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is John Mizenko located?

John Mizenko practices at 4100 Warrensville Center Rd Suite 203, Warrensville Heights, OH 44122. The listed phone number is (216) 561-0801.

What is John Mizenko'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 Mizenko was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days 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.