Alexandra Gersing, MD
Diagnostic Radiology Physician · San Francisco, CA
Alexandra Gersing, MD is a diagnostic radiology physician with a practice address in San Francisco, California, and NPI 1578386967, issued on Nov 4, 2024. Check the license (California SPI854, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexandra Gersing
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- SPI854 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave, San Francisco, CA 94143
- Phone
- (415) 353-1457
- Enumerated
- Nov 4, 2024
- Record last updated
- Feb 12, 2026
- Medicare enrollment
- Enrolled (PECOS I20241119003659); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 400 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Weiyun Ai, MDMedical Oncology Physician1649346842
Verify Alexandra Gersing in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license SPI854Check 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 2 group practices
- Ucsf Medical Group Business ServicesSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexandra Gersing among 4,500 diagnostic radiology physician records in California
Alexandra Gersing, MD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than over 99% of them.
- NPI issued2024 · over 99% of these records are older, under 1% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2011 · median 2004 among the 3,130 with a school on file
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in San Francisco → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Ronald Arenson, MDSan Francisco, CA 941431063477750
- Diana Baker, M.D.San Francisco, CA 941431790730984
- Cynthia Chin, M.D.San Francisco, CA 941431447292404
- Rita Freimanis, MDSan Francisco, CA 941431508840802
- Charles Gooding, MDSan Francisco, CA 941431497710214
- Roy Gordon, M.D.San Francisco, CA 941431881636876
- Bonnie Joe, M.D.San Francisco, CA 941431710927314
- Theodore Lee, M.D.San Francisco, CA 941431083656193
Common questions
What is Alexandra Gersing, MD's NPI number?
Alexandra Gersing, MD's National Provider Identifier (NPI) is 1578386967, issued on Nov 4, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra Gersing, MD located?
The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (415) 353-1457. Providers update this record themselves, so call before visiting.
How can I verify Alexandra Gersing, MD's license?
NPPES lists California license number SPI854, 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.