John Carter Barker, M.D.
Psychiatry Physician · San Francisco, CA
John Carter Barker, M.D. is a psychiatry physician with a practice address in San Francisco, California, and NPI 1487794020, issued on Feb 6, 2007. Check the license (California G84024, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Carter Barker
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G84024 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1990 41St Ave, San Francisco, CA 94116
- Phone
- (415) 753-7255
- Enumerated
- Feb 6, 2007
- Record last updated
- Aug 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (415) 753-0164
- Medicare enrollment
- Enrolled (PECOS I20090505000179); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1990 41St Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Louis BanksCommunity Health Worker1114495389
- Jason BartosavageSpecialist1053832204
- Ann Marie Bautista, SENIOR CLERK TYPISTOther Technician1457551871
- Melanie BrandtCommunity Health Worker1902216823
- Rachel Brandwene, LCSWClinical Social Worker1851771547
- Sophia Carcamo- Heekin, LCSWSocial Worker1417226887
Verify John Carter Barker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G84024Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average psychiatry physician in 2024
208 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Quetiapine Fumarate19 claims
- Clonazepam18 claims
- Duloxetine Hcl14 claims
- Escitalopram Oxalate14 claims
- Ambien Cr13 claims
- Methylphenidate Hcl13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 90.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- City And County OF San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Carter Barker among 8,673 psychiatry physician records in California
John Carter Barker, 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 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1987 · median 2005 among the 3,295 with a school on file
- Record last updated2012 · 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).
763 psychiatry physician records list a practice address in San Francisco
They are 763 of the 38,143 NPPES records with a practice address in San Francisco, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in San Francisco → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Anita Barzman, MDSan Francisco, CA 941161154584985
- Helena Chan, M.D.San Francisco, CA 941161831399369
- Siu-Kwan Chow, M.D.San Francisco, CA 941161972544419
- Michael Coleman, MDSan Francisco, CA 941161720127459
- Michael Geiser, M.D.San Francisco, CA 941161265460166
- Verna LoSan Francisco, CA 941161801025275
- Laurie Mun, M.D.San Francisco, CA 941161720127665
- Daniel OlsonSan Francisco, CA 941161700232022
Common questions
What is John Carter Barker, M.D.'s NPI number?
John Carter Barker, M.D.'s National Provider Identifier (NPI) is 1487794020, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Carter Barker, M.D. located?
The NPPES record lists a practice address at 1990 41St Ave, San Francisco, CA, 94116. Phone: (415) 753-7255. Providers update this record themselves, so call before visiting.
How can I verify John Carter Barker, M.D.'s license?
NPPES lists California license number G84024, 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 John Carter Barker, M.D. prescribe under Medicare Part D?
In 2024, John Carter Barker, M.D. had 208 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is John Carter Barker, M.D.'s MIPS final score?
The 2023 MIPS final score is 90.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.