Quick answers
- Which hospitals does Willis Ko work at?
- Medicare's official clinician data lists Willis Ko at 3 hospitals: Anderson Hospital, Christian Hospital Northeast and SSM St Clare Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Willis Ko see patients?
- Medicare's clinician data lists 7 practice locations, including Alton, IL, Fenton, MO and Saint Louis, MO. Call before your visit to confirm the address.
- What is Willis Ko's specialty?
- Medicare lists Interventional Cardiology as the primary specialty.
- Does Willis Ko accept Medicare assignment?
- Yes. Medicare's clinician data says Willis Ko accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Willis Ko?
- (618) 463-7240, as listed in official Medicare / NPI Registry data.
- What is Willis Ko's NPI number?
- 1215465307. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Willis Ko works
Medicare's Facility Affiliation Data lists Willis Ko at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Anderson HospitalMaryville, IL · Acute Care Hospital · CCN 140289
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · CCN 260180
- SSM St Clare Health CenterFenton, MO · Acute Care Hospital · CCN 260081
Practice locations
Addresses where Willis Ko is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1 Memorial DrAlton, IL 62002 (618) 463‑7240
- 1011 Bowles Ave, Suite 300Fenton, MO 63026 (636) 496‑5000
- 11133 Dunn RdSaint Louis, MO 63136 (314) 653‑5643
- 11133 Dunn Rd, Suite 2427Saint Louis, MO 63136 (314) 653‑5643
- 11155 Dunn Rd, Suite 109nSaint Louis, MO 63136 (314) 953‑8799
Group practices
Medicare enrollment lists Willis Ko as a member of these groups (CMS data updated 2026-10-02).
- SSM Medical Group Inc568 clinicians in the group
- Fairview Heights Medical Group SC444 clinicians in the group
Specialties
- Interventional Cardiologyprimary
Other interventional cardiologists in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215465307 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians