Willis Ko, MD
Interventional Cardiology Physician · Maryville, IL
Willis Ko, MD is an interventional cardiology physician with a practice address in Maryville, Illinois, and NPI 1215465307, issued on Jun 1, 2017. Check the license (Illinois 036171090, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Willis Ko
- Credential
- MD
- Primary taxonomy
- Interventional Cardiology Physician 207RI0011X
- License numbers
- 036171090 IL
2024024174 MO
MT213475 PA
Self-reported in NPPES; status is on the state search - Practice location
- 6810 State Route 162 Ste 102B, Maryville, IL 62062
- Phone
- (618) 288-4076
- Enumerated
- Jun 1, 2017
- Record last updated
- Sep 19, 2025
- Fax
- (618) 288-4215
- Medicare enrollment
- Enrolled (PECOS I20240827001851); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest interventional cardiology physician records → All 320 in Illinois → Look up another NPI →
Verify Willis Ko 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 036171090Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average interventional cardiology physician in 2024
275 Medicare Part D claims for 116 beneficiaries, against an average of 3,179 among the 6,605 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Clopidogrel101 claims
- Atorvastatin Calcium22 claims
- Rosuvastatin Calcium17 claims
- Metoprolol Succinate16 claims
- Carvedilol15 claims
- Eliquis12 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.
Industry payments in 2024: $1,115.60
31 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 6,394 providers of this specialty with any payment received $7,062.29 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Fairview Heights Medical Group SCAlton, IL
- Ssm Medical Group IncFenton, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Willis Ko among 320 interventional cardiology physician records in Illinois
Willis Ko, MD is one of 320 interventional cardiology physician records with a practice address in Illinois. 96% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 92% of them.
- NPI issued2017 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 96% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2017 · median 2002 among the 278 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0011X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Interventional Cardiology Physician providers in Illinois
There are 320 interventional cardiology physician records in Illinois.
All 320 in Illinois → Every provider in Maryville → Interventional Cardiology Physician nationwide →
The 8 interventional cardiology physician records with the nearest ZIP codes
- Chien-Jung Lin, M.D., PH.D.Alton, IL 620021346654308
- Mohsin Salih, M.D.Alton, IL 620021326488594
- Girish Mood, MDBelleville, IL 622201487755518
- Ahmed Hussein, MDBelleville, IL 622261104294685
- Prasad Kandula, M.D.Belleville, IL 622261164518460
- Venkatesh Anjan, M.D.O Fallon, IL 622691275799850
- Hasan RehmanO Fallon, IL 622691386028124
- Shiyam Satwani, M.DO Fallon, IL 622691407067184
Common questions
What is Willis Ko, MD's NPI number?
Willis Ko, MD's National Provider Identifier (NPI) is 1215465307, issued on Jun 1, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Willis Ko, MD located?
The NPPES record lists a practice address at 6810 State Route 162 Ste 102B, Maryville, IL, 62062. Phone: (618) 288-4076. Providers update this record themselves, so call before visiting.
How can I verify Willis Ko, MD's license?
NPPES lists Illinois license number 036171090, 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 Willis Ko, MD prescribe under Medicare Part D?
In 2024, Willis Ko, MD had 275 Medicare Part D claims for 116 beneficiaries; the average among interventional cardiology physician prescribers was 3,179. 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.