Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Zainer, DPM

Podiatrist in Janesville, WI · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1548317928

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Registry record

Entity type Individual (Type 1)

Name Gregory Zainer

Credential DPM

Sex Male

Practice address 1010 N Washington St, Janesville, WI, 53548

Phone (608) 741-6799

Enumeration date Jan 5, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

213E00000X Podiatrist Podiatric Medicine & Surgery Service Providers · License 566 (WI) Primary

DPM · Doctor of Podiatric Medicine: A physician specializing in medical and surgical care of the foot and ankle. About the DPM credential

Other identifiers

Identifier	Type	State	Issuer
43218900	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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Gregory Zainer's NPI record?

Cross-check NPI 1548317928 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1548317928 active?

Yes, as of the latest NPPES snapshot, NPI 1548317928 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.