Jason Smith Day, M.D.
Emergency Medicine Physician · San Rafael, CA
Jason Smith Day, M.D. is an emergency medicine physician with a practice address in San Rafael, California, and NPI 1730235540, issued on Jan 25, 2007. Check the license (California A96623, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jason Smith Day
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A96623 CA
Self-reported in NPPES; status is on the state search - Practice location
- 99 Montecillo RD, San Rafael, CA 94903
- Phone
- (415) 408-8012
- Enumerated
- Jan 25, 2007
- Record last updated
- May 20, 2025
- Medicare enrollment
- Enrolled (PECOS I20210115001581); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 2005
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 99 Montecillo RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jason Smith Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% more Medicare Part D claims than the average emergency medicine physician in 2024
277 Medicare Part D claims for 211 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 37 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen23 claims
- Cefpodoxime Proxetil21 claims
- Ondansetron Odt19 claims
- Prednisone18 claims
- Cefadroxil16 claims
- Amoxicillin-Clavulanate Potass14 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.
Bills Medicare through one group practice
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Smith Day among 7,751 emergency medicine physician records in California
Jason Smith Day, M.D. is one of 7,751 emergency 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2005 · median 2011 among the 4,560 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in San Rafael → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Morgan Camp, MDSan Rafael, CA 949031407845738
- Cynthia Clark, MDSan Rafael, CA 949031144219767
- John David, MDSan Rafael, CA 949031912081993
- Anna Denham, MDSan Rafael, CA 949031750465738
- Jennifer Grayzar, M.D.San Rafael, CA 949031336160530
- Douglas Harris, MDSan Rafael, CA 949031073697066
- Kurt Kunzel, MDSan Rafael, CA 949031073502696
- Frederick Meyer, MDSan Rafael, CA 949031780768788
Common questions
What is Jason Smith Day, M.D.'s NPI number?
Jason Smith Day, M.D.'s National Provider Identifier (NPI) is 1730235540, issued on Jan 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jason Smith Day, M.D. located?
The NPPES record lists a practice address at 99 Montecillo RD, San Rafael, CA, 94903. Phone: (415) 408-8012. Providers update this record themselves, so call before visiting.
How can I verify Jason Smith Day, M.D.'s license?
NPPES lists California license number A96623, 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 Jason Smith Day, M.D. prescribe under Medicare Part D?
In 2024, Jason Smith Day, M.D. had 277 Medicare Part D claims for 211 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.