Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Diana L Harper, LPC
Counselor in Denver, CO · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437298387
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Registry record
Entity type Individual (Type 1)
Name Diana L Harper
Credential LPC
Sex Female
Practice address 2525 South Downing St, Denver, CO, 80210
Phone (303) 778-5774
Fax (303) 778-2436
Enumeration date Feb 6, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy.
About the LPC credential
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
Where does Diana Harper practice?
The practice location on file with NPPES is in Denver, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Diana Harper?
The National Provider Identifier (NPI) for Diana Harper is 1437298387, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.