Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Leo N Dumstorff II, D.D.S.

Dentist in Belleville, IL · enumerated 2007 · practices at Kraemer & Vogel Od Ltd.

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

National Provider Identifier

1306042031

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Registry record

Entity type Individual (Type 1)

Name Dr. Leo N Dumstorff II

Credential D.D.S.

Sex Male

Practice address Belleville, IL, 62226

Phone (618) 235-9101

Fax (618) 235-9135

Enumeration date Jun 21, 2007

Last updated in NPPES Jan 13, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 19013509 (IL) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

Is NPI 1306042031 active?

Yes, as of the latest NPPES snapshot, NPI 1306042031 is active (record last updated 2012-01-13).

How do I verify Leo Dumstorff's NPI record?

Cross-check NPI 1306042031 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-13.