Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Dennis Frederick Zagrodnik II, M.D.
Surgery Physician in Summit, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538155569
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Registry record
Entity type Individual (Type 1)
Name Dr. Dennis Frederick Zagrodnik II
Credential M.D.
Sex Male
Practice address 36500 Aurora Dr, Summit, WI, 53066
Phone (262) 434-5000
Fax (262) 434-7250
Enumeration date Sep 26, 2005
Last updated in NPPES Jul 2, 2024
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 34900300 | Medicaid | WI | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Dennis Zagrodnik?
Dennis Zagrodnik is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Judith Gresky Nurse Practitioner · Summit, WI NPI 1962401794 Gregory Nelson Emergency Medicine Physician · Summit, WI NPI 1841299385 Kimberly Ireland Ophthalmology Physician · Summit, WI NPI 1366435851 Andrew Dodd Plastic and Reconstructive Surgery Physician · Summit, WI NPI 1811979156 Renee Marszalek Hospitalist Physician · Summit, WI NPI 1730163445 Nimish Vakil Gastroenterology Physician · Summit, WI NPI 1336124585 Krishna Prasad Emergency Medicine Physician · Summit, WI NPI 1306822747 Michael Kefer Emergency Medicine Physician · Summit, WI NPI 1457337891
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-02.