NPI Portal NPI Lookup & Verification

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

Mr. Mark Douglas Stephan, R.N.

Registered Nurse in Hilliard, OH · enumerated 2006.

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

National Provider Identifier

1689730723

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Registry record

Entity type Individual (Type 1)
Name Mr. Mark Douglas Stephan
Credential R.N.
Sex Male
Practice address Hilliard, OH, 43026
Phone (614) 777-5115
Enumeration date Dec 30, 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

163W00000X Registered Nurse Nursing Service Providers · License RN 185090 (OH) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier Type State Issuer
2137182 Other OH IP NUMBER

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

Where does Mark Stephan practice?
The practice location on file with NPPES is in Hilliard, OH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Stephan?
The National Provider Identifier (NPI) for Mark Stephan is 1689730723, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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