Quick answers
- Where does Brennan L. Mars see patients?
- Medicare's clinician data lists 3 practice locations, including Boulder, CO. Call before your visit to confirm the address.
- What is Brennan L. Mars's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Brennan L. Mars accept Medicare assignment?
- Yes. Medicare's clinician data says Brennan L. Mars accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Brennan L. Mars?
- (303) 358-4603, as listed in official Medicare / NPI Registry data.
- What is Brennan L. Mars's NPI number?
- 1013030923. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Brennan L. Mars is enrolled with Medicare (CMS data updated 2026-10-02).
- 4800 Baseline Rd, E104Boulder, CO 80303 (303) 358‑4603
- 4800 Baseline Rd E104 Pmb, Suite 344Boulder, CO 80303
- Pmb 344, E104Boulder, CO 80303
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Boulder
Clinicians with the same Medicare primary specialty in Boulder, CO — not a recommendation.
Clinician information
| Credential | PSY |
|---|---|
| Graduation year | 1996 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013030923 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians