Mark S. Garrison, DO
Obstetrics & Gynecology Physician · Chico, CA
Mark S. Garrison, DO is an obstetrics & gynecology physician with a practice address in Chico, California, and NPI 1801881503, issued on Sep 19, 2005. Check the license (California 20A9268, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark S. Garrison
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 20A9268 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1025 Village LN, Chico, CA 95926
- Phone
- (530) 566-0132
- Enumerated
- Sep 19, 2005
- Record last updated
- Jul 12, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (530) 566-1682
- Medicaid ID
- 00AX92680 CA
- Medicare enrollment
- Enrolled (PECOS I20070705000319); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1025 Village LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Brazil, MA, ASWClinical Social Worker1245910694
- Roger Carper, MTMassage Therapist1639193121
- Miranda McWilliamsMental Health Counselor1922895655
- Danica Oliver, MSWClinical Social Worker1740025733
- Lara Wood, R.D.Registered Dietitian1265664445
Verify Mark S. Garrison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9268Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
82 Medicare Part D claims for 30 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol (Twice Weekly)12 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.
Industry payments in 2024: $41,143.77
43 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Enloe Medical CenterChico, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark S. Garrison among 5,088 obstetrics & gynecology physician records in California
Mark S. Garrison, DO is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1987 · median 2004 among the 2,700 with a school on file
- Record last updated2010 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Chico → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Celeste Bailey Pace, MDChico, CA 959261033606934
- Joseph Brooks, MDChico, CA 959261710090162
- Sarah Burke, MDChico, CA 959261770842056
- Kimberly Hunt, M.D.Chico, CA 959261144582081
- Scott Mellum, M.D.Chico, CA 959261598751786
- Kacie RoundsChico, CA 959261366814576
- Alicia Taylor, M.D.Chico, CA 959261104926112
- Raleigh Unterseher, M.D.Chico, CA 959261982641387
Common questions
What is Mark S. Garrison, DO's NPI number?
Mark S. Garrison, DO's National Provider Identifier (NPI) is 1801881503, issued on Sep 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Garrison, DO located?
The NPPES record lists a practice address at 1025 Village LN, Chico, CA, 95926. Phone: (530) 566-0132. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Garrison, DO's license?
NPPES lists California license number 20A9268, 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 S. Garrison, DO prescribe under Medicare Part D?
In 2024, Mark S. Garrison, DO had 82 Medicare Part D claims for 30 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.