Dr. Brennan Lynn Mars, PSY.D
Dr. Brennan Lynn Mars is a Psychologist provider (Psychologist) practicing in Boulder, CO, registered in the NPPES registry with NPI 1013030923 since 2007. The credential PSYD stands for Doctor of Psychology.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1013030923 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Brennan Lynn Mars |
| Credential | PSY.D |
| Sex | Female |
| Practice address | Boulder, CO, 80303 |
| Phone | 3033584603 |
| Enumeration date | 2007-04-06 |
| Last updated in NPPES | 2007-11-16 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Primary | 2327 | CO |
PSYD — Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 58079831 | Medicaid | CO | — |
Copy-ready billing details
Provider: Brennan Mars, PSY.D NPI: 1013030923 Taxonomy: 103T00000X (Psychologist) Address: Boulder, CO, 80303
Verify this record
Cross-check NPI 1013030923 against the authoritative CMS record: view Dr. Brennan Lynn Mars on the official NPPES registry .
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. Read the full guide or validate an NPI number.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-11-16.