Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Grudle
Peer Specialist in Tigard, OR · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1679434989
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Registry record
Entity type Individual (Type 1)
Name Mark Grudle
Sex X
Practice address 10362 Sw Mcdonald St, Tigard, OR, 97224
Phone (971) 202-7964
Enumeration date Nov 18, 2025
Last updated in NPPES Nov 18, 2025
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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Mark Grudle?
Mark Grudle is registered in NPPES with the primary taxonomy of Peer Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Kimberly Brandt Family Nurse Practitioner · Tigard, OR NPI 1851304281 John Pfeiffer Peer Specialist · Tigard, OR NPI 1821424326 Aram Beresky Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1942637053 Shana Sierra Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1023476983 Jessica Simones Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1255882775 Tatiana Poznekoff Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1720596844 Clarence Mckee Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1871094482 Alicia Howard Addiction (Substance Use Disorder) Counselor · Tigard, OR NPI 1609360676
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-18.