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

Dr. Mark A Dull, D.C.,DABCO,DACBSP

Orthopedic Chiropractor in Twin Lakes, WI · enumerated 2006.

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

National Provider Identifier

1356437958

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A Dull

Credential D.C.,DABCO,DACBSP

Sex Male

Practice address Twin Lakes, WI, 53181

Phone (262) 877-2196

Fax (262) 877-2204

Enumeration date Oct 4, 2006

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

111NX0800X Orthopedic Chiropractor Chiropractic Providers · License 2331-012 (WI) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
38931200	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.

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Frequently asked questions

How do I verify Mark Dull's NPI record?

Cross-check NPI 1356437958 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356437958 active?

Yes, as of the latest NPPES snapshot, NPI 1356437958 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.