Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Shawn William Northrop, LMSW
Social Worker in Marinette, WI · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821723412
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Registry record
Entity type Individual (Type 1)
Name Shawn William Northrop
Credential LMSW
Sex Male
Practice address 700 Owena St, Marinette, WI, 54143
Phone (715) 504-2150
Enumeration date Jul 19, 2022
Last updated in NPPES Jul 19, 2022
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 6851115100 (MI) Secondary
104100000X Social Worker Behavioral Health & Social Service Providers · License 132745-121 (WI) Primary
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
How do I verify Shawn Northrop's NPI record?
Cross-check NPI 1821723412 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1821723412 active?
Yes, as of the latest NPPES snapshot, NPI 1821723412 is active (record last updated 2022-07-19).
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-19.