Willis Ko, MD
NPI 1215465307 · Interventional Cardiology Physician · Maryville, IL
Enrolled with Medicare as Practitioner - Interventional Cardiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Willis Ko, MD is a Interventional Cardiology Physician provider in Maryville, IL (NPI 1215465307).
Provider details
- NPI number
- 1215465307
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036171090 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
170 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $77 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate and Valve Function93325 | 28 | $3 |
| Ultrasound of Heart, Follow-Up93308 | 26 | $24 |
| Ultrasound of Heart Blood Flow, Valves and Chambers, Follow-Up93321 | 24 | $7 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 23 | $128 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clopidogrel Bisulfatebrand: Clopidogrel | 101 | 46 |
| Atorvastatin Calcium | 22 | 12 |
| Rosuvastatin Calcium | 17 | — |
| Metoprolol Succinate | 16 | 13 |
| Carvedilol | 15 | 12 |
| Apixabanbrand: Eliquis | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,116 across 31 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 201 14th St SwLargo, FL 33770-3133Phone: (727) 588-3700Fax: (727) 585-7205
- 5645 Main StFlushing, NY 11355-5045Phone: (718) 670-2000
- 230 N Broad StreetHahnemann University HospitalPhiladelphia, PA 19102Phone: (215) 762-7000
Registry dates
- Enumerated
- 2017-06-01
- Last updated
- 2025-09-19
- Certified
- 2025-09-19
Frequently asked questions
- What is Willis Ko's NPI number?
- Willis Ko's National Provider Identifier (NPI) is 1215465307, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Willis Ko's specialty?
- Willis Ko is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Willis Ko located?
- Willis Ko's practice location on file with NPPES is 6810 State Route 162 Ste 102b, Maryville, IL 62062-8560.
- What is Willis Ko's phone number?
- The practice phone number listed in the NPPES registry for Willis Ko is (618) 288-4076.
- Does Willis Ko accept Medicare?
- Willis Ko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Willis Ko's NPI active?
- Yes — Willis Ko's NPI (1215465307) is active in the NPPES registry as of the last update on 2025-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.