Ari D. Baron, M.D.
Specialist · San Francisco, CA
Ari D. Baron, M.D. is a specialist with a practice address in San Francisco, California, and NPI 1013086420, issued on Nov 7, 2006. Check the license (California G72619, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ari D. Baron
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G72619 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Webster Street Suite 225, San Francisco, CA 94115
- Phone
- (415) 923-3012
- Enumerated
- Nov 7, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- YYY49266Y CA
- Medicare enrollment
- Enrolled (PECOS I20081111000873); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Verify Ari D. Baron in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G72619Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% more Medicare Part D claims than the average specialist in 2024
2,751 Medicare Part D claims for 274 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 63% of claims.
Most prescribed
- Nubeqa398 claims
- Eliquis164 claims
- Prednisone138 claims
- Lupron Depot133 claims
- Abiraterone Acetate113 claims
- Xgeva110 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): 73.8 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).
Industry payments in 2024: $49,172.76
116 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 5,844 providers of this specialty with any payment received $4,760.79 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 2 group practices
- Pacific Hematology Oncology Assoc.San Francisco, CA
- Sutter Bay Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ari D. Baron among 5,749 specialist records in California
Ari D. Baron, M.D. is one of 5,749 specialist records with a practice address in California. 30% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1990 · median 1989 among the 1,075 with a school on file
- Record last updated2007 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
666 specialist records list a practice address in San Francisco
They are 666 of the 38,143 NPPES records with a practice address in San Francisco, and 5,749 specialist records in California.
All 5,749 in California → Every provider in San Francisco → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Barry Baron, MDSan Francisco, CA 941151467563353
- Kristoffer Chang, M.D.San Francisco, CA 941151790761336
- Carolyn Cooper, M.D.San Francisco, CA 941151518010560
- Frank Farrell, M.D.San Francisco, CA 941151891770905
- Gary Feldman, M.D.San Francisco, CA 941151336220854
- Kathleen Grant, M.D.San Francisco, CA 941151538238548
- Sonya KashyapSan Francisco, CA 941151457444184
- George Kimmerling, M.D.San Francisco, CA 941151346313269
Common questions
What is Ari D. Baron, M.D.'s NPI number?
Ari D. Baron, M.D.'s National Provider Identifier (NPI) is 1013086420, issued on Nov 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ari D. Baron, M.D. located?
The NPPES record lists a practice address at 2100 Webster Street Suite 225, San Francisco, CA, 94115. Phone: (415) 923-3012. Providers update this record themselves, so call before visiting.
How can I verify Ari D. Baron, M.D.'s license?
NPPES lists California license number G72619, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ari D. Baron, M.D. prescribe under Medicare Part D?
In 2024, Ari D. Baron, M.D. had 2,751 Medicare Part D claims for 274 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Ari D. Baron, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.8 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.