Nathan A. Favini, M.D.
Internal Medicine Physician · San Francisco, CA
Nathan A. Favini, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1124381645, issued on Jun 19, 2012. Check the license (California A135758, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nathan A. Favini
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A135758 CA
Self-reported in NPPES; status is on the state search - Practice location
- 180 Sutter St, San Francisco, CA 94104
- Phone
- (415) 349-0850
- Enumerated
- Jun 19, 2012
- Record last updated
- Jun 6, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20260406001167); accepts Medicare assignment
- Medical or professional school
- Harvey Medical College, 2012
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 180 Sutter St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Geno Genasci, M.D.Internal Medicine Physician1386904985
- Chelsea Stinemetz, RN, FNP-CFamily Nurse Practitioner1740813310
Verify Nathan A. Favini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135758Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Alameda Health SystemOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan A. Favini among 17,696 internal medicine physician records in California
Nathan A. Favini, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- Record last updated2018 · 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 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Laura Arbogast, DOSan Francisco, CA 941041235209354
- Lisa Ashe, D.O.San Francisco, CA 941041033364708
- Peter Benedith, MDSf, CA 941041720253719
- Fred Cohen, M.D.San Francisco, CA 941041750445581
- Dan Kalshan, MDSan Francisco, CA 941041326033200
- Celina Labrec-Salmons, MDSan Francisco, CA 941041225265119
- Denise Lee, D.O.San Francisco, CA 941041689708331
- Maria Magat, MDSan Francisco, CA 941041821142688
Common questions
What is Nathan A. Favini, M.D.'s NPI number?
Nathan A. Favini, M.D.'s National Provider Identifier (NPI) is 1124381645, issued on Jun 19, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Nathan A. Favini, M.D. located?
The NPPES record lists a practice address at 180 Sutter St, San Francisco, CA, 94104. Phone: (415) 349-0850. Providers update this record themselves, so call before visiting.
How can I verify Nathan A. Favini, M.D.'s license?
NPPES lists California license number A135758, 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.
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.