Mark Stephen Giesbrecht, M.D.
Psychiatry Physician · Bakersfield, CA
Mark Stephen Giesbrecht, M.D. is a psychiatry physician with a practice address in Bakersfield, California, and NPI 1366554560, issued on Sep 1, 2006. Check the license (California A84165, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Stephen Giesbrecht
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A84165 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 E Belle Ter, Bakersfield, CA 93307
- Phone
- (661) 635-2950
- Enumerated
- Sep 1, 2006
- Record last updated
- May 18, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (661) 635-2983
- Medicare enrollment
- Enrolled (PECOS I20040316001468); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1600 E Belle Ter
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rebecca AbairCase Manager/Care Coordinator1255468823
- Sara Abdijadid, D.O.Psychiatry Physician1407163934
- Jared AgertonCase Manager/Care Coordinator1588149918
- Ammar Ahmad, MDPsychiatry Physician1407384456
- Daniel AlexanderCase Manager/Care Coordinator1609390756
- Edith Alvarez ZepedaCase Manager/Care Coordinator1730859877
Verify Mark Stephen Giesbrecht in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average psychiatry physician in 2024
426 Medicare Part D claims for 26 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Clozapine60 claims
- Bupropion Xl32 claims
- Divalproex Sodium Er31 claims
- Divalproex Sodium23 claims
- Invega Sustenna22 claims
- Haloperidol21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- County OF KernBakersfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Stephen Giesbrecht among 8,673 psychiatry physician records in California
Mark Stephen Giesbrecht, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2000 · median 2005 among the 3,295 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
109 psychiatry physician records list a practice address in Bakersfield
They are 109 of the 11,539 NPPES records with a practice address in Bakersfield, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Bakersfield → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sara Abdijadid, D.O.Bakersfield, CA 933071407163934
- Ammar Ahmad, MDBakersfield, CA 933071407384456
- Rossano Bangasan, M.D.Bakersfield, CA 933071659407955
- Komal Desai, M.D.Bakersfield, CA 933071144217506
- Forrest Doan, D.O.Bakersfield, CA 933071639412042
- Veena Doddakashi, M.D.Bakersfield, CA 933071427150820
- Michael Essex, M.D.Bakersfield, CA 933071952335820
- Sahana Huq, MDBakersfield, CA 933071154479012
Common questions
What is Mark Stephen Giesbrecht, M.D.'s NPI number?
Mark Stephen Giesbrecht, M.D.'s National Provider Identifier (NPI) is 1366554560, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Stephen Giesbrecht, M.D. located?
The NPPES record lists a practice address at 1600 E Belle Ter, Bakersfield, CA, 93307. Phone: (661) 635-2950. Providers update this record themselves, so call before visiting.
How can I verify Mark Stephen Giesbrecht, M.D.'s license?
NPPES lists California license number A84165, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Stephen Giesbrecht, M.D. prescribe under Medicare Part D?
In 2024, Mark Stephen Giesbrecht, M.D. had 426 Medicare Part D claims for 26 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.