Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ruth Katherine Hollenback, BS
Health Educator in Denver, CO · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356931596
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Ruth Katherine Hollenback
Credential BS
Sex Female
Practice address 1648 Gaylord St, Denver, CO, 80206
Phone (303) 336-1631
Enumeration date Jan 21, 2021
Last updated in NPPES Jan 21, 2021
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 Ruth Hollenback?
Ruth Hollenback is registered in NPPES with the primary taxonomy of Health Educator. 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 → Emma Maki-Gianani Addiction (Substance Use Disorder) Registered Nurse · Denver, CO NPI 1689036998 John Raiche Peer Specialist · Denver, CO NPI 1225509045 Alix Mcglothan Social Worker · Denver, CO NPI 1952037228 Regents of the University of Colorado Substance Use Disorder Rehabilitation Clinic/Center · Denver, CO NPI 1497636419 Regents of the University of Colorado Adult Mental Health Clinic/Center · Denver, CO NPI 1891646329
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-21.