Regina Y. Chiu, M.D.
Cardiovascular Disease Physician · O Fallon, IL
Regina Y. Chiu, M.D. is a cardiovascular disease physician with a practice address in O Fallon, Illinois, and NPI 1043272693, issued on Apr 6, 2006. Check the license (Illinois 036118748, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Regina Y. Chiu
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 036118748 IL
Self-reported in NPPES; status is on the state search - Practice location
- Three Saint Elizabeth Blvd Ste 2800, O Fallon, IL 62269
- Phone
- (618) 233-6044
- Enumerated
- Apr 6, 2006
- Record last updated
- Dec 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (833) 973-4218
- Medicare enrollment
- Enrolled (PECOS I20070829000328); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,073 in Illinois → Look up another NPI →
Also registered at Three Saint Elizabeth Blvd Ste 2800
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Venkatesh Anjan, M.D.Interventional Cardiology Physician1275799850
- Dana Baugher, FNPFamily Nurse Practitioner1497268965
- Thomas Cahill, MDCardiovascular Disease Physician1023128113
- Katherine Corbin, NP-CAdult Health Nurse Practitioner1710433768
- Pavan Gupta, MDCardiovascular Disease Physician1861519563
- Lori Beth Helmers, APRNAdult Health Nurse Practitioner1063457794
Verify Regina Y. Chiu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036118748Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average cardiovascular disease physician in 2024
6,606 Medicare Part D claims for 803 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Metoprolol Succinate681 claims
- Amlodipine Besylate464 claims
- Atorvastatin Calcium445 claims
- Lisinopril411 claims
- Eliquis410 claims
- Furosemide341 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 MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
3 hospitals and group practices
- Hshs Holy Family Hospital IncGreenville, IL · Acute Care Hospitals3 of 5 stars
- Prairie Cardiovascular Consultants LtdO Fallon, IL
- St Elizabeths Hospital OF The Hospital Sisters OF The Third OrderO Fallon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Regina Y. Chiu among 1,073 cardiovascular disease physician records in Illinois
Regina Y. Chiu, M.D. is one of 1,073 cardiovascular disease physician records with a practice address in Illinois. 85% 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, 50% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1999 · median 2001 among the 688 with a school on file
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 cardiovascular disease physician records list a practice address in O Fallon
They are 9 of the 1,077 NPPES records with a practice address in O Fallon, and 1,073 cardiovascular disease physician records in Illinois.
All 1,073 in Illinois → Every provider in O Fallon → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Ashraf Al Dadah, MDO Fallon, IL 622691457526576
- Thomas Cahill, MDO Fallon, IL 622691023128113
- Pavan Gupta, MDO Fallon, IL 622691861519563
- Scott Marrus, MDO Fallon, IL 622691063578284
- Vinaya Mulkareddy, M.D.O Fallon, IL 622691104207984
- Frederick Ochieng', M.D.O Fallon, IL 622691497072854
- John Scally, MDO Fallon, IL 622691508952318
- Atul Shah, M.D.O Fallon, IL 622691215965660
Common questions
What is Regina Y. Chiu, M.D.'s NPI number?
Regina Y. Chiu, M.D.'s National Provider Identifier (NPI) is 1043272693, issued on Apr 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Regina Y. Chiu, M.D. located?
The NPPES record lists a practice address at Three Saint Elizabeth Blvd Ste 2800, O Fallon, IL, 62269. Phone: (618) 233-6044. Providers update this record themselves, so call before visiting.
How can I verify Regina Y. Chiu, M.D.'s license?
NPPES lists Illinois license number 036118748, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Regina Y. Chiu, M.D. prescribe under Medicare Part D?
In 2024, Regina Y. Chiu, M.D. had 6,606 Medicare Part D claims for 803 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
What is Regina Y. Chiu, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 of 100. 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.