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DR. WILLIS KO MD
NPI 1215465307
Internal Medicine - Interventional Cardiology in Maryville, IL

Active since June 01, 2017PECOS EnrolledAccepts Medicare Assignment
6810 STATE ROUTE 162 STE 102B, MARYVILLE, IL 62062(618) 288-4076(618) 288-4215 Get Directions Write a Review

NPPES record last updated: September 19, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 19, 2025, Aug 5, 2024, Mar 19, 2023 and 2 more (5 updates tracked since 2017).

About Dr. Willis Ko Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIS KO MD (NPI 1215465307) is an individual interventional cardiology provider in Maryville, Illinois, licensed in Illinois (036171090) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS, is affiliated with Anderson Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1215465307
Entity TypeIndividualMale
Primary Taxonomy207RI0011X
Provider Legal NameDR. WILLIS KOCredential: MD
Location Address6810 STATE ROUTE 162 STE 102BMaryville, IL 62062-8560
Mailing Address660 Mason Ridge Center Dr Ste 300Saint Louis, MO 63141-8512 · (314) 448-3791 · Fax (314) 996-7658
Phone(618) 288-4076
Fax(618) 288-4215
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateJune 1, 2017
Last NPPES UpdateSeptember 19, 20255 updates tracked since enumeration
NPPES CertifiedSeptember 19, 2025
✔ NPI 1215465307 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Interventional CardiologyAllopathic & Osteopathic Physicians
Taxonomy Code207RI0011X
Licenses✔ Licensed in IL · 036171090✔ Licensed in MO · 2024024174
Definition
An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.
Also ListedInternal MedicineTaxonomy 207R00000X · License MT213475 (PA)
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License MT213475 (PA)
6810 STATE ROUTE 162 STE 102B, Maryville, IL 62062
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Secondary Practice Locations 3

Location 1230 N Broad Street, Hahnemann University HospitalPhiladelphia, PA 19102 · Phone (215) 762-7000
Location 25645 Main StFlushing, NY 11355-5045 · Phone (718) 670-2000
Location 3201 14th St SWLargo, FL 33770-3133 · Phone (727) 588-3700 · Fax (727) 585-7205

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Willis Ko Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375806102
PECOS Enrollment IDI20240822000341, I20240827001851
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
30 services24 patients
Ultrasound of heart with color-depicted blood flow, rate and valve function 93325
An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.
28 services28 patients
Ultrasound of heart, follow-up 93308
A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.
26 services26 patients
Ultrasound of heart blood flow, valves and chambers, follow-up 93321
This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.
24 services24 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
23 services23 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
15 services14 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Anderson Hospital

Acute Care Hospitals · Maryville, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140289
Location6800 State Route 162Maryville, IL 62062 · Madison County
Emergency services Birthing friendly

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Ssm St Clare Health Center

Acute Care Hospitals · Fenton, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260081
Location1015 BowlesFenton, MO 63026 · Jefferson County
Emergency services Birthing friendly

Christian Hospital Northeast

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260180
Location11133 Dunn RoadSaint Louis, MO 63136 · St. Louis County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62062 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$131.14 typical visit price
range $56.28 – $173.35
Typical copayment $32.78 (range $14.07 – $43.33)
Most-billed visit code 99204
Established Patient
$99.71 typical visit price
range $17.51 – $139.99
Typical copayment $24.92 (range $4.37 – $34.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Willis Ko's NPI number?

The NPI number for Willis Ko is 1215465307. It was assigned to this individual provider in the NPPES registry on June 1, 2017.

Where is Willis Ko located?

Willis Ko practices at 6810 State Route 162 Ste 102B, Maryville, IL 62062. The listed phone number is (618) 288-4076.

What is Willis Ko's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Is Willis Ko enrolled in Medicare?

Yes. Willis Ko is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Willis Ko affiliated with any hospitals?

According to CMS data, Willis Ko is affiliated with Anderson Hospital, Barnes Jewish Hospital, Ssm St Clare Health Center and Christian Hospital Northeast.

When was this NPI record last updated?

The NPPES record for Willis Ko was last updated on September 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.