Kirsten Yvette Day, MD
Family Medicine Physician · San Francisco, CA
Kirsten Yvette Day, MD is a family medicine physician with a practice address in San Francisco, California, and NPI 1730270323, issued on Sep 27, 2006. Check the license (California G72692, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kirsten Yvette Day
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G72692 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Potrero Avenue, San Francisco, CA 94110
- Phone
- (415) 206-8651
- Enumerated
- Sep 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 206-8387
- Medicaid ID
- 00G728920 CA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1001 Potrero Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kirsten Yvette Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72692Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average family medicine physician in 2024
622 Medicare Part D claims for 81 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 117 claims were for opioids.
Most prescribed
- Morphine Sulfate Er39 claims
- Atorvastatin Calcium36 claims
- Oxycodone Hcl28 claims
- Gabapentin22 claims
- Hydrocodone-Acetaminophen21 claims
- Metformin Hcl20 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.
Kirsten Yvette Day among 17,133 family medicine physician records in California
Kirsten Yvette Day, 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. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 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).
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
- Joaquin Barahona, M. D.San Francisco, CA 941101205895133
- Luis Bonilla, MDSan Francisco, CA 941101629019708
- Christopher Bositis, MDSan Francisco, CA 941101427054493
- Romilda Foresti-Lorente, MDSan Francisco, CA 941101164455374
- Steven Lawton, MDSan Francisco, CA 941101366486748
- Todd May, MDSan Francisco, CA 941101679528335
- Pooja Mittal, DOSan Francisco, CA 941101215916200
- David Nidorf, MDSan Francisco, CA 941101336186121
Common questions
What is Kirsten Yvette Day, MD's NPI number?
Kirsten Yvette Day, MD's National Provider Identifier (NPI) is 1730270323, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kirsten Yvette Day, MD located?
The NPPES record lists a practice address at 1001 Potrero Avenue, San Francisco, CA, 94110. Phone: (415) 206-8651. Providers update this record themselves, so call before visiting.
How can I verify Kirsten Yvette Day, MD's license?
NPPES lists California license number G72692, 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 Kirsten Yvette Day, MD prescribe under Medicare Part D?
In 2024, Kirsten Yvette Day, MD had 622 Medicare Part D claims for 81 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.