Doctor profile · Federal record
Dr. Brennan Mars, PSY.D
Psychologist (CMS: Clinical Psychologist) · Boulder, CO
- NPI 1013030923
- Accepts Medicare
- 30 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
4800 Baseline RD Ste E104 Pmb 344
Boulder, CO 803032643
(303) 358-4603 - Mailing address
-
Pmb 344 4800 Baseline Road, E104
Boulder, CO 80303
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- November 16, 2007
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 103T00000X — NUCC code
- State license (1)
- Colorado #2327
- Medicaid
- CO #58079831
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1013030923. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
523
Distinct HCPCS
4
Medicare allowed
$65,819
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90837 |
Psychotherapy, 1 hour | 237 | 18 | $128 | |
90837 |
Psychotherapy, 1 hour | 172 | 19 | $146 | |
90834 |
Psychotherapy, 45 minutes | 71 | 13 | $87 | |
90834 |
Psychotherapy, 45 minutes | 43 | 13 | $97 |
In context: peer comparison
Among 3 peers in Boulder Psychologist, average services per provider: 212. This provider delivers 2.5× the peer median.Frequently asked questions
What is Dr. Brennan Mars's medical specialty?
Dr. Brennan Mars practices Psychologist in Boulder, CO.
Where does Dr. Brennan Mars practice?
Dr. Brennan Mars practices at 4800 Baseline RD Ste E104 Pmb 344, Boulder, CO 803032643. Office phone: 3033584603.
What is Dr. Brennan Mars's NPI?
Dr. Brennan Mars's National Provider Identifier (NPI) is 1013030923, issued by NPPES.
Does Dr. Brennan Mars accept Medicare assignment?
Yes. Dr. Brennan Mars accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Brennan Mars commonly perform?
Top Medicare-reported procedures in 2023: Psychotherapy (HCPCS 90837); Psychotherapy (HCPCS 90837); Psychotherapy (HCPCS 90834). Source: CMS Medicare Physician & Other Practitioners file.