Erin A. Hsu, M.D.
Infectious Disease Physician · San Francisco, CA
Erin A. Hsu, M.D. is an infectious disease physician with a practice address in San Francisco, California, and NPI 1366481509, issued on Jun 5, 2006. Check the license (California A89312, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Erin A. Hsu
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A89312 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Webster Street, San Francisco, CA 94115
- Phone
- (415) 923-3883
- Enumerated
- Jun 5, 2006
- Record last updated
- Oct 1, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (415) 749-5705
- Medicare enrollment
- Enrolled (PECOS I20060824000310); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2003
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 2100 Webster Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lesley Anderson, MDOrthopaedic Surgery Physician1205945003
- Carolyn Chang, MDPlastic and Reconstructive Surgery Physician1598826745
- Quita Cruciger, M.D.Dermatology Physician1629161245
- Loren Eskenazi, MDPlastic and Reconstructive Surgery Physician1578624714
- William Goodson, MDSurgery Physician1760508311
- Eric Hernandez, R.D.Registered Dietitian1861624090
Verify Erin A. Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89312Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average infectious disease physician in 2024
87 Medicare Part D claims for 26 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Biktarvy16 claims
- Genvoya11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 97.2 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
- Pacific Inpatient Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin A. Hsu among 1,119 infectious disease physician records in California
Erin A. Hsu, M.D. is one of 1,119 infectious disease 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2003 · median 2003 among the 735 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Francisco → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- David Busch, M.D.San Francisco, CA 941151942343975
- Andrew FaulkSan Francisco, CA 941151598224222
- Shelley Gordon, M.D.San Francisco, CA 941151841334521
- John Nienow, MDSan Francisco, CA 941151861472649
- Joel Palefsky, MDSan Francisco, CA 941151336191345
- Lory Wiviott, M.D.San Francisco, CA 941151548395437
- Stephen Cohen, MDSan Francisco, CA 941161003241878
- Lisa DanzigSan Francisco, CA 941141497489629
Common questions
What is Erin A. Hsu, M.D.'s NPI number?
Erin A. Hsu, M.D.'s National Provider Identifier (NPI) is 1366481509, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Erin A. Hsu, M.D. located?
The NPPES record lists a practice address at 2100 Webster Street, San Francisco, CA, 94115. Phone: (415) 923-3883. Providers update this record themselves, so call before visiting.
How can I verify Erin A. Hsu, M.D.'s license?
NPPES lists California license number A89312, 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 Erin A. Hsu, M.D. prescribe under Medicare Part D?
In 2024, Erin A. Hsu, M.D. had 87 Medicare Part D claims for 26 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Erin A. Hsu, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.2 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.