Michael Deftos, M.D.,PH.D.
Anatomic Pathology & Clinical Pathology Physician · San Francisco, CA
Michael Deftos, M.D.,PH.D. is an anatomic pathology & clinical pathology physician with a practice address in San Francisco, California, and NPI 1346557139, issued on Sep 1, 2010. Check the license (California A98387, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Deftos
- Credential
- M.D.,PH.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- A98387 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2455 39TH Ave, San Francisco, CA 94116
- Phone
- (415) 504-7422
- Enumerated
- Sep 1, 2010
- Record last updated
- Sep 1, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110726000688); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Verify Michael Deftos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A98387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 80.6 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 one group practice
- County OF Santa ClaraSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Deftos among 1,554 anatomic pathology & clinical pathology physician records in California
Michael Deftos, M.D.,PH.D. is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2003 · median 2003 among the 891 with a school on file
- Record last updated2010 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in California
There are 1,554 anatomic pathology & clinical pathology physician records in California.
All 1,554 in California → Every provider in San Francisco → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Fredric Mendes, MDSan Francisco, CA 941161356319032
- Michael Nystrom, M.D.San Francisco, CA 941161316274871
- Ronald Balassanian, MDSan Francisco, CA 941151043282379
- Andrew Bandy, M.D.San Francisco, CA 941151902148810
- Amanda Borgen, MDSan Francisco, CA 941151851928469
- Sarah Cherny, M.D.San Francisco, CA 941151750593869
- Carey Eberle, M.D.San Francisco, CA 941151790913507
- Dean Fong, DOSan Francisco, CA 941151609057041
Common questions
What is Michael Deftos, M.D.,PH.D.'s NPI number?
Michael Deftos, M.D.,PH.D.'s National Provider Identifier (NPI) is 1346557139, issued on Sep 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Michael Deftos, M.D.,PH.D. located?
The NPPES record lists a practice address at 2455 39TH Ave, San Francisco, CA, 94116. Phone: (415) 504-7422. Providers update this record themselves, so call before visiting.
How can I verify Michael Deftos, M.D.,PH.D.'s license?
NPPES lists California license number A98387, 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.
What is Michael Deftos, M.D.,PH.D.'s MIPS final score?
The 2023 MIPS final score is 80.6 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.