Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark D Weinhold D D S P C

Dentist in Sandwich, IL · enumerated 2008 · authorized official Mark Weinhold, President.

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

National Provider Identifier

1851547848

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Registry record

Entity type Organization (Type 2)

Legal business name Mark D Weinhold D D S P C

Practice address 1 E Countyline Rd, Ste A, Sandwich, IL, 60548

Phone (815) 786-2185

Fax (815) 786-7014

Enumeration date Aug 11, 2008

Last updated in NPPES Dec 17, 2012

Taxonomy & classification

122300000X Dentist Dental Providers · License 019017683 (IL) Primary

Authorized official

Name Mark Weinhold

Title President

Phone (815) 786-2185

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

Where is Mark D Weinhold D D S P C located?

The practice location on file with NPPES is in Sandwich, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2012-12-17. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-17.