Erin Hsu, M.D.
Infectious Disease Physician · San Francisco, CA
Erin 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 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
- Entity
- Type 1 · individual
Also registered at 2100 Webster Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Erin 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
89% 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 807 among the 5,613 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 Medicare quality score for 2023: 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).
One hospital or facility affiliation
- Pacific Inpatient Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Infectious Disease Physician providers in California
There are 899 infectious disease physician records in California.
Other infectious disease physician records in California
- Sanaz Abderrahmane, M.D.Sacramento, CA1902039902
- Glen Abergel, M.D.Oxnard, CA1093743924
- Igor Abolnik, MDRureka, CA1194783829
- Nehkonti Adams, M.D.San Diego, CA1194985705
- Alina Adeel, M.DLa Jolla, CA1831453596
- Oladunni Adeyiga, MDLos Angeles, CA1801809751
- Jacqueline Adler, M.D.West Hills, CA1326094582
- Wollelaw Agmas, M.DRancho Cucamonga, CA1174937825
- Dipti Agrawal, MDPalo Alto, CA1437137189
- Manju Agrawal, M.D.Los Angeles, CA1902999220
Common questions
What is Erin Hsu, M.D.'s NPI number?
Erin 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 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 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 Hsu, M.D. prescribe under Medicare Part D?
In 2024, Erin Hsu, M.D. had 87 Medicare Part D claims for 26 beneficiaries; the average among infectious disease physician prescribers was 807. Part D covers Medicare prescriptions only.
What is Erin Hsu, M.D.'s Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.