Robert S. Gardner, M.D.
Psychiatry Physician · Santa Rosa, CA
Robert S. Gardner, M.D. is a psychiatry physician with a practice address in Santa Rosa, California, and NPI 1023179850, issued on Dec 13, 2006. Check the license (California G17718, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert S. Gardner
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G17718 CA
Self-reported in NPPES; status is on the state search - Practice location
- 525 College Ave, Santa Rosa, CA 95404
- Phone
- (707) 575-7647
- Enumerated
- Dec 13, 2006
- Record last updated
- Sep 28, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (707) 575-7739
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Robert S. Gardner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G17718Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average psychiatry physician in 2024
847 Medicare Part D claims for 60 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Levothyroxine Sodium65 claims
- Aripiprazole57 claims
- Lamotrigine54 claims
- Lorazepam51 claims
- Liothyronine Sodium33 claims
- Fluvoxamine Maleate32 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.
Robert S. Gardner among 8,673 psychiatry physician records in California
Robert S. Gardner, 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 fileNo · 38% of these records are
- Record last updated2009 · 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).
73 psychiatry physician records list a practice address in Santa Rosa
They are 73 of the 6,884 NPPES records with a practice address in Santa Rosa, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Santa Rosa → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Susan Ahart, MD, MASanta Rosa, CA 954041407924475
- Donald Apostle, MDSanta Rosa, CA 954041407802994
- Gary BravoSanta Rosa, CA 954041669536009
- Aleta Drummond, MDSanta Rosa, CA 954041114073129
- Elyse Dubin, MDSanta Rosa, CA 954041962430850
- Neil Ehrlich, M.D.Santa Rosa, CA 954041013078625
- Naomi Granvold, MDSanta Rosa, CA 954041356425326
- Ari Harrison, M. D.Santa Rosa, CA 954041386706927
Common questions
What is Robert S. Gardner, M.D.'s NPI number?
Robert S. Gardner, M.D.'s National Provider Identifier (NPI) is 1023179850, issued on Dec 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert S. Gardner, M.D. located?
The NPPES record lists a practice address at 525 College Ave, Santa Rosa, CA, 95404. Phone: (707) 575-7647. Providers update this record themselves, so call before visiting.
How can I verify Robert S. Gardner, M.D.'s license?
NPPES lists California license number G17718, 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 Robert S. Gardner, M.D. prescribe under Medicare Part D?
In 2024, Robert S. Gardner, M.D. had 847 Medicare Part D claims for 60 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.