Ian Mathias Jaffee, M.D.
Anatomic Pathology & Clinical Pathology Physician · San Francisco, CA
Ian Mathias Jaffee, M.D. is an anatomic pathology & clinical pathology physician with a practice address in San Francisco, California, and NPI 1376603399, issued on Dec 11, 2006. Check the license (California A93612, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ian Mathias Jaffee
- Credential
- M.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- A93612 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3700 California St, San Francisco, CA 94118
- Phone
- (559) 455-4000
- Enumerated
- Dec 11, 2006
- Record last updated
- Apr 26, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (559) 455-4007
- Medicaid ID
- 00A936120 CA
- Medicare enrollment
- Enrolled (PECOS I20070712000820); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At Houston, 2002
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Also registered at 3700 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Suruchi Bhatia, MDPediatric Endocrinology Physician1336244623
- Lauri Black, MS, CGCGenetic Counselor (M.S.)1376521898
Verify Ian Mathias Jaffee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A93612Check 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): 91.6 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
- California Pacific Pathology Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian Mathias Jaffee among 1,554 anatomic pathology & clinical pathology physician records in California
Ian Mathias Jaffee, M.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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2002 · 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
- Shannon Mulholland, MDSan Francisco, CA 941171477584340
- Ana Quiroga, MDSan Francisco, CA 941171730276551
- Michael Deftos, M.D.,PH.D.San Francisco, CA 941161346557139
- 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
Common questions
What is Ian Mathias Jaffee, M.D.'s NPI number?
Ian Mathias Jaffee, M.D.'s National Provider Identifier (NPI) is 1376603399, issued on Dec 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian Mathias Jaffee, M.D. located?
The NPPES record lists a practice address at 3700 California St, San Francisco, CA, 94118. Phone: (559) 455-4000. Providers update this record themselves, so call before visiting.
How can I verify Ian Mathias Jaffee, M.D.'s license?
NPPES lists California license number A93612, 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 Ian Mathias Jaffee, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.6 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.