Michelle Castillones, PHARMD
Ambulatory Care Pharmacist · San Rafael, CA
Michelle Castillones, PHARMD is an ambulatory care pharmacist with a practice address in San Rafael, California, and NPI 1922457191, issued on Jun 8, 2016. Check the license (California 73653, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michelle Castillones
- Credential
- PHARMD
- Primary taxonomy
- Ambulatory Care Pharmacist 1835P2201X
- License number
- 73653 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1650 Los Gamos Dr Ste 270, San Rafael, CA 94903
- Phone
- (415) 482-6819
- Enumerated
- Jun 8, 2016
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest ambulatory care pharmacist records → All 485 in California → Look up another NPI →
Verify Michelle Castillones in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 73653Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.1 times the Medicare Part D claims of the average ambulatory care pharmacist in 2024
2,713 Medicare Part D claims for 579 beneficiaries, against an average of 527 among the 449 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Atorvastatin Calcium486 claims
- Metformin Hcl Er350 claims
- Ozempic296 claims
- Metformin Hcl158 claims
- Lisinopril140 claims
- Glimepiride112 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.
Michelle Castillones among 485 ambulatory care pharmacist records in California
Michelle Castillones, PHARMD is one of 485 ambulatory care pharmacist records with a practice address in California. 39% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 16% of them.
- NPI issued2016 · 16% of these records are older, 67% newer
- In a Medicare fileYes · 39% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2021 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1835P2201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ambulatory Care Pharmacist providers in California
There are 485 ambulatory care pharmacist records in California.
All 485 in California → Every provider in San Rafael → Ambulatory Care Pharmacist nationwide →
The 8 ambulatory care pharmacist records with the nearest ZIP codes
- Omar Ahmed, PHARMDSan Rafael, CA 949031285254037
- Yeonbi Aylward, PHARMDSan Rafael, CA 949031669822771
- Ali AzarpiraSan Rafael, CA 949031568828390
- Jenny ChenSan Rafael, CA 949031003652173
- Shirley Feng, PHARMDSan Rafael, CA 949031518488097
- Sirena LauSan Rafael, CA 949031386165868
- Andrew Lothrop, PHARMDSan Rafael, CA 949031851744320
- Ronda Lowe, RPHMill Valley, CA 949411972880128
Common questions
What is Michelle Castillones, PHARMD's NPI number?
Michelle Castillones, PHARMD's National Provider Identifier (NPI) is 1922457191, issued on Jun 8, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Michelle Castillones, PHARMD located?
The NPPES record lists a practice address at 1650 Los Gamos Dr Ste 270, San Rafael, CA, 94903. Phone: (415) 482-6819. Providers update this record themselves, so call before visiting.
How can I verify Michelle Castillones, PHARMD's license?
NPPES lists California license number 73653, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Michelle Castillones, PHARMD prescribe under Medicare Part D?
In 2024, Michelle Castillones, PHARMD had 2,713 Medicare Part D claims for 579 beneficiaries; the average among ambulatory care pharmacist prescribers was 527. 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.