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XAVIER W. PARRENO, M.D., S.C.
NPI 1386850378
Internal Medicine in Gurnee, IL

Active since May 15, 2007
135 GREENLEAF ST, SUITE 100, GURNEE, IL 60031(847) 336-2150(847) 336-2160 Get Directions Write a Review

NPPES record last updated: September 2, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Xavier W. Parreno, M.d., S.c. NPPES

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

XAVIER W. PARRENO, M.D., S.C. (NPI 1386850378) is a healthcare organization registered as an internal medicine in Gurnee, Illinois and active in the NPI registry since May 2007. The organization lists Xavier W Parreno, Owner, as its authorized official.

NPPES Registry Identity

NPI1386850378
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameXAVIER W. PARRENO, M.D., S.C.
Location Address135 GREENLEAF ST, SUITE 100Gurnee, IL 60031-3334
Mailing Address135 Greenleaf St, Suite 100Gurnee, IL 60031-3334 · (847) 336-2150 · Fax (847) 336-2160
Phone(847) 336-2150
Fax(847) 336-2160
Organization SubpartNo
Authorized OfficialXavier W ParrenoOwner · (847) 336-2150
Enumeration DateMay 15, 2007
Last NPPES UpdateSeptember 2, 2016
✔ NPI 1386850378 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
135 GREENLEAF ST, Gurnee, IL 60031
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Other Identifiers 5

Medicare UPINH1050IL
Medicaid036097735IL
Medicare PINK18087IL
OtherDF7056IL · Railroad Medicare
Medicare PINK18088IL

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Xavier W. Parreno, M.d., S.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Xavier W. Parreno, M.D., S.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Xavier Parreno, M.D.
Internal Medicine
NPI 1023085479
135 N GREENLEAF ST SUITE 100
Gurnee, IL 60031
(847) 336-2150
✔ PECOS✔ Accepts MedicareSame address

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

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 Xavier W. Parreno, M.D., S.C.'s NPI number?

The NPI number for Xavier W. Parreno, M.D., S.C. is 1386850378. It was assigned to this organization in the NPPES registry on May 15, 2007.

Where is Xavier W. Parreno, M.D., S.C. located?

Xavier W. Parreno, M.D., S.C. is located at 135 Greenleaf St Suite 100, Gurnee, IL 60031. The listed phone number is (847) 336-2150.

What is Xavier W. Parreno, M.D., S.C.'s specialty?

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

Is Xavier W. Parreno, M.D., S.C. enrolled in Medicare?

Yes. Xavier W. Parreno, M.D., S.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Xavier W. Parreno, M.D., S.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Xavier W. Parreno, M.D., S.C.. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Xavier W. Parreno, M.D., S.C. accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Xavier W. Parreno, M.D., S.C. 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 Xavier W. Parreno, M.D., S.C. was last updated on September 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.