Carol Anne Castillo, MD
Family Medicine Physician · Sonoma, CA
Carol Anne Castillo, MD is a family medicine physician with a practice address in Sonoma, California, and NPI 1104878909, issued on May 17, 2006. Check the license (California G077909, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Carol Anne Castillo
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G077909 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15000 Arnold Drive, Sonoma, CA 95431
- Phone
- (707) 938-6556
- Enumerated
- May 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 15000 Arnold Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Carol Anne Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G077909Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Carol Anne Castillo among 17,133 family medicine physician records in California
Carol Anne Castillo, MD 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 not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 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).
20 family medicine physician records list a practice address in Sonoma
They are 20 of the 395 NPPES records with a practice address in Sonoma, and 17,133 family medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,133 in California → Every provider in Sonoma → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gerald Camarata, MDSonoma, CA 954311013969815
- Mary Christensen, MDEldridge, CA 954311982656724
- Anne French, MDSonoma, CA 954311528141587
- David Gray, MDSonoma, CA 954311083666861
- Timothy Kaczmar, M.D.Eldridge, CA 954311447244405
- Mary King, MDSonoma, CA 954311891747671
- Katherine Walker, MDSonoma, CA 954311437101177
- Laurence Alavezos, M.D.Covelo, CA 954281306067327
Common questions
What is Carol Anne Castillo, MD's NPI number?
Carol Anne Castillo, MD's National Provider Identifier (NPI) is 1104878909, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carol Anne Castillo, MD located?
The NPPES record lists a practice address at 15000 Arnold Drive, Sonoma, CA, 95431. Phone: (707) 938-6556. Providers update this record themselves, so call before visiting.
How can I verify Carol Anne Castillo, MD's license?
NPPES lists California license number G077909, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.