NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Hennen, OD

Optometrist in Saint Paul, MN · enumerated 2005 · practices at Dakota Optometric Eye Care Associates, P.A..

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

National Provider Identifier

1215934559

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark Hennen
Credential OD
Sex Male
Practice address 1540 Humboldt Ave, Saint Paul, MN, 55118
Phone (651) 457-2020
Enumeration date Jul 1, 2005
Last updated in NPPES Jul 29, 2010

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 1944 (MN) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
237223100 Medicaid MN -

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 1215934559 active?
Yes, as of the latest NPPES snapshot, NPI 1215934559 is active (record last updated 2010-07-29).
How do I verify Mark Hennen's NPI record?
Cross-check NPI 1215934559 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-29.