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ELK GROVE INTERNISTS, P.C.
NPI 1659307874
Internal Medicine in Elk Grove Vlg, IL

Active since June 23, 2006
810 BIESTERFIELD RD, SUITE G4, ELK GROVE VLG, IL 60007(847) 981-8856 Get Directions Write a Review

NPPES record last updated: January 9, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Elk Grove Internists, P.c. NPPES

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

ELK GROVE INTERNISTS, P.C. (NPI 1659307874) is a healthcare organization registered as an internal medicine in Elk Grove Vlg, Illinois and active in the NPI registry since June 2006. The organization lists Mark Weisberg, Owner, as its authorized official.

NPPES Registry Identity

NPI1659307874
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameELK GROVE INTERNISTS, P.C.
Location Address810 BIESTERFIELD RD, SUITE G4Elk Grove Vlg, IL 60007-7312
Mailing Address810 Biesterfield Rd, Suite G4Elk Grove Vlg, IL 60007-7312
Phone(847) 981-8856
Organization SubpartNo
Authorized OfficialMark WeisbergOwner · (847) 981-8856
Enumeration DateJune 23, 2006
Last NPPES UpdateJanuary 9, 2008
✔ NPI 1659307874 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.
810 BIESTERFIELD RD, Elk Grove Vlg, IL 60007
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Other Identifiers 1

Medicare PIN624830

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Elk Grove Internists, P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Elk Grove Internists, P.C., which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.

Clinicians, nearest first (2)

Premalatha Nandkumar
Internal Medicine
NPI 1366471898
810 BIESTERFIELD RD SUITE G4
Elk Grove Vlg, IL 60007
(847) 981-8856
✔ PECOS✔ Accepts MedicareSame address
Mark Weisberg
Internal Medicine
NPI 1972531168
810 BIESTERFIELD RD SUITE G4
Elk Grove Vlg, IL 60007
(847) 981-8856
✔ 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 Elk Grove Internists, P.C.'s NPI number?

The NPI number for Elk Grove Internists, P.C. is 1659307874. It was assigned to this organization in the NPPES registry on June 23, 2006.

Where is Elk Grove Internists, P.C. located?

Elk Grove Internists, P.C. is located at 810 Biesterfield Rd Suite G4, Elk Grove Vlg, IL 60007. The listed phone number is (847) 981-8856.

What is Elk Grove Internists, P.C.'s specialty?

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

Is Elk Grove Internists, P.C. enrolled in Medicare?

Yes. Elk Grove Internists, P.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Elk Grove Internists, P.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Internal Medicine, reassign their Medicare billing to Elk Grove Internists, P.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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Elk Grove Internists, P.C. was last updated on January 9, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.