Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark A Rush, PH.D.
Psychologist in Denver, CO · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1134119126
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark A Rush
Credential PH.D.
Sex Male
Practice address 673 Grant St, Denver, CO, 80203
Phone (303) 949-6297
Fax (303) 464-1413
Enumeration date Oct 21, 2005
Last updated in NPPES Sep 11, 2025
Taxonomy & licenses
103TA0400X Addiction (Substance Use Disorder) Psychologist Behavioral Health & Social Service Providers · License 1934 (CO) Secondary
103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 1934 (CO) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 1934 (CO) Secondary
103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 1934 (CO) Secondary
103TF0000X Family Psychologist Behavioral Health & Social Service Providers · License 1934 (CO) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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
What is the NPI number for Mark Rush?
The National Provider Identifier (NPI) for Mark Rush is 1134119126, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Rush practice?
The practice location on file with NPPES is in Denver, CO. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Diann Shannon Clinical Psychologist · Denver, CO NPI 1043306665 Carol Leavenworth Mental Health Counselor · Denver, CO NPI 1235286063 Mark Palmer Psychologist · Denver, CO NPI 1912030180 Amy Calabrese Clinical Psychologist · Denver, CO NPI 1215054655 Amy Gorsline, Psyd, Pllc Clinical Psychologist · Denver, CO NPI 1285751875 Scott Boscoe-Huffman Counselor · Denver, CO NPI 1700158011 Boscoe-Huffman Wellness Center, Pllc Clinical Child & Adolescent Psychologist · Denver, CO NPI 1790041358
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.