Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Michael L Crupper, N.D.
Naturopath in Portland, OR · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1407090640
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Michael L Crupper
Credential N.D.
Sex Male
Practice address 4259 Ne Broadway St, Portland, OR, 97213
Phone (503) 235-2259
Enumeration date Apr 30, 2009
Last updated in NPPES Apr 30, 2009
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
How do I verify Michael Crupper's NPI record?
Cross-check NPI 1407090640 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1407090640 active?
Yes, as of the latest NPPES snapshot, NPI 1407090640 is active (record last updated 2009-04-30).
Other providers at this practice address
Browse all → Ron Sundholm Hearing Instrument Specialist · Portland, OR NPI 1962592766 Northland Hearing Centers, Inc. Audiologist-Hearing Aid Fitter · Portland, OR NPI 1528193380 Mia Crupper Naturopath · Portland, OR NPI 1609992650 Gift of Life Clinic Naturopath · Portland, OR NPI 1407128309 John Mccollum Specialist · Portland, OR NPI 1083036073
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-30.