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MARY CATHERINE (KATIE) RYBAK MD
NPI 1962665059
Internal Medicine in Belleville, IL

Active since July 08, 2008PECOS Enrolled
4550 MEMORIAL DR, STE. 340, BELLEVILLE, IL 62226(618) 257-6200(618) 257-6679 Get Directions Write a Review

NPPES record last updated: October 4, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 4, 2021, Mar 17, 2021 (2 updates tracked since 2021).

About Mary Catherine (katie) Rybak Md NPPES

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

MARY CATHERINE (KATIE) RYBAK MD (NPI 1962665059) is an individual internal medicine provider in Belleville, Illinois, licensed in Illinois (036128107) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Shiloh.

NPPES Registry Identity

NPI1962665059
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARY CATHERINE (KATIE) RYBAKCredential: MD
Location Address4550 MEMORIAL DR, STE. 340Belleville, IL 62226-5372
Mailing Address4550 Memorial Dr, Ste. 340Belleville, IL 62226-5372 · (618) 257-6200 · Fax (618) 257-6679
Phone(618) 257-6200
Fax(618) 257-6679
Sole ProprietorNo
Enumeration DateJuly 8, 2008
Last NPPES UpdateOctober 4, 20212 updates tracked since enumeration
NPPES CertifiedOctober 4, 2021
✔ NPI 1962665059 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036128107
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 036128107 (IL)
4550 MEMORIAL DR, Belleville, IL 62226
Open in Google Maps ↗

Secondary Practice Location 1

Location 11414 Cross St Ste 210Shiloh, IL 62269-2988 · Phone (618) 607-1260 · Fax (618) 624-4865

Other Identifiers 1

Other036128107IL · Idfpr

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Catherine (katie) Rybak Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

2

Medicare enrollment records show Mary Rybak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - Illinois Snf, LLP
Same address
Infectious Disease
4500 MEMORIAL DR
Belleville, IL 62226
  • Reassigned Medicare billing, Illinois enrollment
  • 51 clinicians in this Medicare group
NPI 1003328329 (618) 233-7750
Cep America-Illinois Hospitalists, LLP
Same address
Internal Medicine
4500 MEMORIAL DR
Belleville, IL 62226
  • Reassigned Medicare billing, Illinois enrollment
  • 329 clinicians in this Medicare group
NPI 1841613403 (618) 233-7750

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62226 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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
3 suppliers21 claims21 services$211.78 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. DEANNA L. RODENBERG NP
Nurse Practitioner
4550 MEMORIAL DR, STE. 340
BELLEVILLE, IL 62226
St. Clair County (618) 257-6200
SHEIKH M SADIQ MD
Psychiatry & Neurology (Neurology)
4550 MEMORIAL DR, SUITE 340
BELLEVILLE, IL 62226
St. Clair County (618) 257-4243
DR. DWIGHT WILLIAM O'DELL M.D.
Obstetrics & Gynecology (Gynecology)
4550 MEMORIAL DR, STE 200
BELLEVILLE, IL 62226
St. Clair County (618) 233-5998
MEMORIAL MEDICAL GROUP, LLC
Internal Medicine
4550 MEMORIAL DR, STE. 340
BELLEVILLE, IL 62226
St. Clair County (618) 257-6302
BELLEVILLE ORTHOPEDICS, P.C.
Specialist
4550 MEMORIAL DR, SUITE 460
BELLEVILLE, IL 62226
St. Clair County (618) 235-2900
MSA ALLIANCE, LLC
Urology
4550 MEMORIAL DR, STE 350
BELLEVILLE, IL 62226
St. Clair County (618) 239-9690
LAKSHMI R. BEERAVOLU MD
Psychiatry & Neurology (Clinical Neurophysiology)
4550 MEMORIAL DR, STE. A480
BELLEVILLE, IL 62226
St. Clair County (618) 234-4531
CA GROUP, LLC
Internal Medicine (Cardiovascular Disease)
4550 MEMORIAL DR, STE 310
BELLEVILLE, IL 62226
St. Clair County (618) 257-6112

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 Mary Rybak's NPI number?

The NPI number for Mary Rybak is 1962665059. It was assigned to this individual provider in the NPPES registry on July 8, 2008.

Where is Mary Rybak located?

Mary Rybak practices at 4550 Memorial Dr Ste. 340, Belleville, IL 62226. The listed phone number is (618) 257-6200.

What is Mary Rybak's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mary Rybak enrolled in Medicare?

Yes. Mary Rybak is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mary Rybak's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Rybak reassigns Medicare benefits to 2 organizations: Cep America - Illinois Snf, LLP (Belleville, IL) and Cep America-Illinois Hospitalists, LLP (Belleville, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Rybak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mary Rybak was last updated on October 4, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.