Brennan Lynn Mars, PSY.D
Psychologist · Boulder, CO
Brennan Lynn Mars, PSY.D is a psychologist with a practice address in Boulder, Colorado, and NPI 1013030923, issued on Apr 6, 2007. Check the license (Colorado 2327, as entered in NPPES) with the Colorado board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Brennan Lynn Mars
- Credential
- PSY.D
- Primary taxonomy
- Psychologist 103T00000X
- License number
- 2327 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4800 Baseline RD Ste E104 Pmb 344, Boulder, CO 80303
- Phone
- (303) 358-4603
- Enumerated
- Apr 6, 2007
- Record last updated
- Nov 16, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 58079831 CO
- Medicare enrollment
- Enrolled (PECOS I20100921001108); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychologist records → All 991 in Colorado → Look up another NPI →
Verify Brennan Lynn Mars in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license 2327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Brennan Lynn Mars among 991 psychologist records in Colorado
Brennan Lynn Mars, PSY.D is one of 991 psychologist records with a practice address in Colorado. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 20% of them.
- NPI issued2007 · 20% of these records are older, 62% newer
- In a Medicare fileNo · 9% of these records are
- In the CMS Doctors and Clinicians fileYes · 17% of these records are
- Graduated1996 · median 2006 among the 164 with a school on file
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
82 psychologist records list a practice address in Boulder
They are 82 of the 5,635 NPPES records with a practice address in Boulder, and 991 psychologist records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 991 in Colorado → Every provider in Boulder → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Elizabeth George, PH.D.Boulder, CO 803031427385251
- Alison GothroBoulder, CO 803031487039913
- Sibyl Hewitt, PH.DBoulder, CO 803031831738863
- Catherine Johnston, PH.D.Boulder, CO 803031851370886
- Eve Kilmer, PHDBoulder, CO 803031184645202
- Karen McCarthy, PH.D.Boulder, CO 803031033109962
- Caitlin McKimmyBoulder, CO 803031134069719
- Edward Mockus, PHDBoulder, CO 803031902213655
Common questions
What is Brennan Lynn Mars, PSY.D's NPI number?
Brennan Lynn Mars, PSY.D's National Provider Identifier (NPI) is 1013030923, issued on Apr 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Brennan Lynn Mars, PSY.D located?
The NPPES record lists a practice address at 4800 Baseline RD Ste E104 Pmb 344, Boulder, CO, 80303. Phone: (303) 358-4603. Providers update this record themselves, so call before visiting.
How can I verify Brennan Lynn Mars, PSY.D's license?
NPPES lists Colorado license number 2327, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.