1. Home
  2. Directory
  3. Illinois
  4. Peoria
  5. Internal Medicine
  6. NPI Profile

DR. IAN ZACHARY LEWIS D.O.
NPI 1053937995
Internal Medicine - Nephrology in Peoria, IL

Active since June 16, 2020PECOS EnrolledAccepts Medicare Assignment
420 NE GLEN OAK AVE STE 401, PEORIA, IL 61603(309) 676-8123(309) 676-8455 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 3, 2025, Jun 16, 2020 (2 updates tracked since 2020).

About Dr. Ian Zachary Lewis D.o. NPPES

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

DR. IAN ZACHARY LEWIS D.O. (NPI 1053937995) is an individual nephrology provider in Peoria, Illinois, licensed in Illinois (036180691) and active in the NPI registry since June 2020. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Michigan State University College Of Osteopathic Medicine (2020).

NPPES Registry Identity

NPI1053937995
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. IAN ZACHARY LEWISCredential: D.O.
Location Address420 NE GLEN OAK AVE STE 401Peoria, IL 61603
Mailing Address1240 E Monroe StMorton, IL 61550-2356 · (734) 301-8648
Phone(309) 676-8123
Fax(309) 676-8455
Sole ProprietorYes
Medical School CMSMichigan State University College Of Osteopathic MedicineGraduated 2020
Enumeration DateJune 16, 2020
Last NPPES UpdateJuly 1, 20262 updates tracked since enumeration
NPPES CertifiedJuly 1, 2026
✔ NPI 1053937995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in IL · 036180691
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036180691 (IL)
420 NE GLEN OAK AVE STE 401, Peoria, IL 61603
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1702 RittenhousePontiac, IL 61764 · Phone (309) 676-8123 · Fax (309) 676-8455
Location 21302 Franklin Ave Ste 3000Normal, IL 61761 · Phone (309) 676-8123 · Fax (309) 676-8455

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ian Zachary Lewis D.o. 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 ID8224482765
PECOS Enrollment IDI20260709004039
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

3

Medicare enrollment records show Ian Lewis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Renalcare Associates, S.C.
Same address
Nephrology
420 NE GLEN OAK AVE STE 401
Peoria, IL 61603
  • Reassigned Medicare billing, Illinois enrollment
  • 52 clinicians in this Medicare group
NPI 1649300377 (309) 676-8123
Sarah Bush Lincoln Health Center
109 mi
Family Medicine
1000 HEALTH CENTER DR
Mattoon, IL 61938
  • Reassigned Medicare billing, Illinois enrollment
  • 652 clinicians in this Medicare group
NPI 1568581379 (217) 258-2525
The Medical College Of Wisconsin, Inc.
181 mi
Internal Medicine
8701 WATERTOWN PLANK RD
Milwaukee, WI 53226
  • Reassigned Medicare billing, Wisconsin enrollment
  • 3,983 clinicians in this Medicare group
NPI 1699720086 (414) 955-7101

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 61603 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
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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.

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.

COURTNEY HARLEY ANP
Nurse Practitioner
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
KUMARPAL SHRISHRIMAL MD
Internal Medicine (Nephrology)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
ALEXANDER J. ALONSO M.D.
Internal Medicine (Nephrology)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
GORDON W JAMES MD
Internal Medicine (Nephrology)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
ROBERT T SPARROW MD
Internal Medicine (Nephrology)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
TIMOTHY A PFLEDERER MD
Internal Medicine (Nephrology)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
MS. TIARA J MULLEN APRN
Nurse Practitioner (Family)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123
SABRINA RENAE JONES APN
Nurse Practitioner (Family)
420 NE GLEN OAK AVE STE 401
PEORIA, IL 61603
Peoria County (309) 676-8123

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 Ian Lewis's NPI number?

The NPI number for Ian Lewis is 1053937995. It was assigned to this individual provider in the NPPES registry on June 16, 2020.

Where is Ian Lewis located?

Ian Lewis practices at 420 NE Glen Oak Ave Ste 401, Peoria, IL 61603. The listed phone number is (309) 676-8123.

What is Ian Lewis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Ian Lewis enrolled in Medicare?

Yes. Ian Lewis 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.

Which organizations bill Medicare for Ian Lewis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ian Lewis reassigns Medicare benefits to 3 organizations: Renalcare Associates, S.C. (Peoria, IL), Sarah Bush Lincoln Health Center (Mattoon, IL) and The Medical College Of Wisconsin, Inc. (Milwaukee, WI). 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 Ian Lewis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ian Lewis accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Oscar Health and Oscar Insurance Company list Ian Lewis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Ian Lewis was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.