Caroline M. Castillo, M.D.
Family Medicine Physician · San Francisco, CA
Caroline M. Castillo, M.D. is a family medicine physician with a practice address in San Francisco, California, and NPI 1114217742, issued on Apr 16, 2011. Check the license (California A121829, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Caroline M. Castillo
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A121829 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2356 Sutter St, San Francisco, CA 94115
- Phone
- (158) 857-7884
- Enumerated
- Apr 16, 2011
- Record last updated
- May 8, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181012001057); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2356 Sutter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brenda Burney-Jackson, NPNurse Practitioner1497793558
Verify Caroline M. Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A121829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average family medicine physician in 2024
1,702 Medicare Part D claims for 224 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 45 claims were for opioids.
Most prescribed
- Atorvastatin Calcium125 claims
- Amlodipine Besylate78 claims
- Lisinopril74 claims
- Levothyroxine Sodium57 claims
- Gabapentin55 claims
- Hydrochlorothiazide37 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): 91.9 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 3 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
- University OF California Sfgh Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caroline M. Castillo among 17,133 family medicine physician records in California
Caroline M. Castillo, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 63% of them.
- NPI issued2011 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2010 · median 2005 among the 10,652 with a school on file
- Record last updated2019 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Francisco → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Payal Bhandari, M.D.San Francisco, CA 941151710922935
- Eduardo Dolhun, MDSan Francisco, CA 941151548328214
- Jeffrey Draisin, M.D.San Francisco, CA 941151356362883
- Arkady Gendelman, M.D.San Francisco, CA 941151104839620
- Lorena Hillman, MDSan Francisco, CA 941151659445963
- Sheena Kumar, MDSan Francisco, CA 941151346314663
- Alex Lin, MDSan Francisco, CA 941151639257298
- Robert Mitchell, MDSan Francisco, CA 941151871527523
Common questions
What is Caroline M. Castillo, M.D.'s NPI number?
Caroline M. Castillo, M.D.'s National Provider Identifier (NPI) is 1114217742, issued on Apr 16, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Caroline M. Castillo, M.D. located?
The NPPES record lists a practice address at 2356 Sutter St, San Francisco, CA, 94115. Phone: (158) 857-7884. Providers update this record themselves, so call before visiting.
How can I verify Caroline M. Castillo, M.D.'s license?
NPPES lists California license number A121829, 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 Caroline M. Castillo, M.D. prescribe under Medicare Part D?
In 2024, Caroline M. Castillo, M.D. had 1,702 Medicare Part D claims for 224 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Caroline M. Castillo, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.9 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.