Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary Mark Heifner, MD

Family Medicine Physician in Menasha, WI · enumerated 2005.

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

National Provider Identifier

1518952928

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Registry record

Entity type Individual (Type 1)

Name Gary Mark Heifner

Credential MD

Sex Male

Practice address 878 Airport Rd, Menasha, WI, 54952

Phone (920) 727-5982

Enumeration date Sep 13, 2005

Last updated in NPPES Sep 4, 2008

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 23080 (WI) Primary

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
30438200	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 Gary Heifner's NPI record?

Cross-check NPI 1518952928 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1518952928 active?

Yes, as of the latest NPPES snapshot, NPI 1518952928 is active (record last updated 2008-09-04).

Other providers at this practice address

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Lawrence Donatelle Family Medicine Physician · Menasha, WI NPI 1871587782

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-04.