Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Catherine L Duncan, LM,CPM
Midwife in Menasha, WI · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1558090415
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Registry record
Entity type Individual (Type 1)
Name Mrs. Catherine L Duncan
Credential LM,CPM
Sex Female
Practice address 990 Plank Rd, Menasha, WI, 54952
Phone (920) 882-6200
Enumeration date Jun 7, 2022
Last updated in NPPES Jun 7, 2022
Taxonomy & licenses
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 1558090415 active?
Yes, as of the latest NPPES snapshot, NPI 1558090415 is active (record last updated 2022-06-07).
How do I verify Catherine Duncan's NPI record?
Cross-check NPI 1558090415 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 2022-06-07.