Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mary-Jo Ann Pierce, O.D.
Optometrist in Hartford, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1750375655
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Registry record
Entity type Individual (Type 1)
Name Dr. Mary-Jo Ann Pierce
Credential O.D.
Sex Female
Practice address 1220 Theil St, Hartford, WI, 53027
Phone (262) 223-6014
Fax (262) 670-5044
Enumeration date Sep 7, 2005
Last updated in NPPES Sep 13, 2016
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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.
Frequently asked questions
Is NPI 1750375655 active?
Yes, as of the latest NPPES snapshot, NPI 1750375655 is active (record last updated 2016-09-13).
How do I verify Mary-Jo Pierce's NPI record?
Cross-check NPI 1750375655 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 2016-09-13.