Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Arnold Dewayne Diehl
Counselor in Sterling, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1396943098
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Registry record
Entity type Individual (Type 1)
Name Arnold Dewayne Diehl
Sex Male
Practice address 2611 Woodlawn Rd, Sterling, IL, 61081
Phone (815) 625-0013
Enumeration date Jul 5, 2007
Last updated in NPPES Jul 8, 2007
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
What specialty is Arnold Diehl?
Arnold Diehl is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → Pamela St Joseph Professional Counselor · Sterling, IL NPI 1114033354 Tammy Stewart Mental Health Counselor · Sterling, IL NPI 1629111794 Chad Brownfield Counseling Psychologist · Sterling, IL NPI 1437278934 Kimberly Crump Counselor · Sterling, IL NPI 1609073816 Christine Schultz Counselor · Sterling, IL NPI 1972700391 Amy Adams Counselor · Sterling, IL NPI 1497953293 Tamara Wolf Counselor · Sterling, IL NPI 1316145139 Amy Strehlow Counselor · Sterling, IL NPI 1780882324
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.