Leo Hsu, MD
Emergency Medicine Physician · O Fallon, MO
Leo Hsu, MD is an emergency medicine physician with a practice address in O Fallon, Missouri, and NPI 1215965702, issued on Jun 30, 2006. Check the license (Missouri 2006007889, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Leo Hsu
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 2006007889 MO
Self-reported in NPPES; status is on the state search - Practice location
- 2 Progress Point CT, O Fallon, MO 63368
- Phone
- (636) 344-1151
- Enumerated
- Jun 30, 2006
- Record last updated
- Aug 25, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 201102902 MO
- Medicare enrollment
- Enrolled (PECOS I20171218000375); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 2 Progress Point CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sandra Habermaas-Herold, CRNACertified Registered Nurse Anesthetist1487840450
Verify Leo Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2006007889Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average emergency medicine physician in 2024
11 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Southeastern Emergency Physicians OF Memphis LLCAlton, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leo Hsu among 1,405 emergency medicine physician records in Missouri
Leo Hsu, MD is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2003 · median 2012 among the 808 with a school on file
- Record last updated2011 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Missouri
There are 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in O Fallon → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Victor Bailey, DOO Fallon, MO 633681760518336
- Randi Becker, MDO Fallon, MO 633681235392788
- Nancy Niemann Royer, MDO Fallon, MO 633681326094145
- Shirin Pinto, MDDardenne Prairie, MO 633681134102262
- Anjum Razzaque, M.D.O Fallon, MO 633681962427229
- Jason Schlautman, M.D.O Fallon, MO 633681609086750
- Betty Varghese, M.D.O Fallon, MO 633681073715702
- Robert Wiele, MDO Fallon, MO 633681356449771
Common questions
What is Leo Hsu, MD's NPI number?
Leo Hsu, MD's National Provider Identifier (NPI) is 1215965702, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leo Hsu, MD located?
The NPPES record lists a practice address at 2 Progress Point CT, O Fallon, MO, 63368. Phone: (636) 344-1151. Providers update this record themselves, so call before visiting.
How can I verify Leo Hsu, MD's license?
NPPES lists Missouri license number 2006007889, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leo Hsu, MD prescribe under Medicare Part D?
In 2024, Leo Hsu, MD had 11 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.