Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marc Musak
Behavior Technician in Concord, CA · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083012843
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Registry record
Entity type Individual (Type 1)
Name Marc Musak
Sex Male
Practice address 1855 2nd St Ste B, Concord, CA, 94519
Phone (855) 223-7123
Fax (619) 374-7134
Enumeration date Dec 10, 2014
Last updated in NPPES Mar 9, 2023
Taxonomy & licenses
106S00000X Behavior Technician Behavioral Health & Social Service Providers · License RBT-22-243346 (CA) Primary
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 Marc Musak practice?
The practice location on file with NPPES is in Concord, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marc Musak?
The National Provider Identifier (NPI) for Marc Musak is 1083012843, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Dionne Brooks Clinical Social Worker · Concord, CA NPI 1972838829 Brandi Ellis Marriage & Family Therapist · Concord, CA NPI 1689997876 Brigette Girardey Marriage & Family Therapist · Concord, CA NPI 1013221233 Crystel Malek Marriage & Family Therapist · Concord, CA NPI 1013271006 Yi-Chun Murphy Behavior Analyst · Concord, CA NPI 1013251743 Courtney Vidal Behavior Analyst · Concord, CA NPI 1215271937 Nicholas Rammer Behavior Analyst · Concord, CA NPI 1184964777 Rachel Hernandez Behavior Analyst · Concord, CA NPI 1003293796
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-09.