Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Maschmeier, CO
Prosthetist in Seattle, WA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1881882637
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name William Maschmeier
Credential CO
Sex Male
Practice address 600 Broadway Ste 190, Seattle, WA, 98122
Phone (206) 323-4040
Fax (206) 324-0943
Enumeration date Oct 5, 2007
Last updated in NPPES Jun 29, 2009
Taxonomy & licenses
224P00000X Prosthetist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PS00000480 (WA) Primary
222Z00000X Orthotist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License OI00000479 (WA) Secondary
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 1881882637 active?
Yes, as of the latest NPPES snapshot, NPI 1881882637 is active (record last updated 2009-06-29).
How do I verify William Maschmeier's NPI record?
Cross-check NPI 1881882637 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 2009-06-29.