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NANI ELK GROVE
NPI 1154675528
Internal Medicine - Nephrology in Oak Brook, IL

Active since November 06, 2012
120 W 22ND ST, OAK BROOK, IL 60523(630) 573-5000(708) 386-2839 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 4, 2026, Mar 7, 2025 (2 updates tracked since 2025).

About Nani Elk Grove NPPES

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

NANI ELK GROVE (NPI 1154675528) is a healthcare organization registered as a nephrology in Oak Brook, Illinois and active in the NPI registry since November 2012. The organization lists Manish M. Tanna, President, as its authorized official.

NPPES Registry Identity

NPI1154675528
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NameNANI ELK GROVE
Location Address120 W 22ND STOak Brook, IL 60523-1563
Mailing Address120 W 22nd StOak Brook, IL 60523-1563 · (630) 573-5000 · Fax (847) 952-9338
Phone(630) 573-5000
Fax(708) 386-2839
Organization SubpartYesParent: Nephrology Associates Of Northern Illinois
Authorized OfficialManish M. TannaPresident · (630) 573-5000
Enumeration DateNovember 6, 2012
Last NPPES UpdateFebruary 4, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 4, 2026
✔ NPI 1154675528 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
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.
120 W 22ND ST, Oak Brook, IL 60523
Open in Google Maps ↗

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)

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

Clinicians Billing Medicare Through This Organization

26

Medicare enrollment records show 26 clinicians reassign Medicare billing to Nani Elk Grove, which bills Medicare for the services they deliver. Of these, 12 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 4

Nephrology18
Nurse Practitioner6
Critical Care (Intensivists)1
Internal Medicine1

Nearest to this location (20)

See all 26
Maytee Boonyapredee, MD
Internal Medicine
NPI 1235314501
911 N ELM ST STE 102
Hinsdale, IL 60521
(630) 495-9356
✔ PECOS✔ Accepts Medicare2.0 mi
Clementa Istrata-Iacob
Nurse Practitioner
NPI 1609534635
911 N ELM ST STE 102
Hinsdale, IL 60521
(630) 495-9356
✔ PECOS✔ Accepts Medicare2.0 mi
Anis Rauf, DO
Critical Care (Intensivists)
NPI 1639259740
911 N ELM ST SUITE 102
Hinsdale, IL 60521
(630) 495-9356
✔ PECOS✔ Accepts Medicare2.0 mi
Yvette Rodriguez, NP
Nurse Practitioner
NPI 1134798747
911 N ELM ST STE 102
Hinsdale, IL 60521
(630) 630-4959
✔ PECOS✔ Accepts Medicare2.0 mi
Suneel Udani, M.D.
Nephrology
NPI 1053517839
911 N ELM ST SUITE 102
Hinsdale, IL 60521
(630) 495-9356
✔ PECOS✔ Accepts Medicare2.0 mi
Sadaf Elahi, M.D.
Nephrology
NPI 1124071147
5201 S. WILLOW SPRINGS RD. S-260
Lagrange, IL 60525
(708) 354-1306
✔ PECOS✔ Accepts Medicare4.0 mi
Leonard Potempa, MD
Nephrology
NPI 1710984646
5201 WILLOW SPRINGS RD SUITE 260
La Grange Highlands, IL 60525
(708) 354-1306
✔ PECOS✔ Accepts Medicare4.0 mi
Ryan Weiss, MD
Nephrology
NPI 1295239762
5201 WILLOW SPRINGS RD STE 260
La Grange Highlands, IL 60525
(708) 354-1306
✔ PECOS✔ Accepts Medicare4.0 mi
Nayan Gowda, MD
Nephrology
NPI 1922294388
2340 S HIGHLAND AVE STE 160
Lombard, IL 60148
(630) 495-9356
✔ PECOS✔ Accepts Medicare4.7 mi
Samir Kumar, MD
Nephrology
NPI 1568460145
2340 S HIGHLAND AVE STE 160
Lombard, IL 60148
(630) 495-9356
✔ PECOS✔ Accepts Medicare4.7 mi
Tricia Littig, APN, CNP
Nurse Practitioner
NPI 1407962129
2340 S HIGHLAND AVE STE 160
Lombard, IL 60148
(630) 495-9356
✔ PECOS✔ Accepts Medicare4.7 mi
Naveen Reddy, MD
Nephrology
NPI 1649217829
2340 S HIGHLAND AVE STE 160
Lombard, IL 60148
(630) 495-9356
✔ PECOS✔ Accepts Medicare4.7 mi
Ryyan Hyder
Nephrology
NPI 1053730895
901 BIESTERFIELD RD STE 402
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Khurram Saleem, M.D.
Nephrology
NPI 1467730192
901 BIESTERFIELD RD S-310
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Brittany Malabanan, MSN
Nurse Practitioner
NPI 1619635216
901 BIESTERFIELD RD STE 310
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Lisa Pillsbury, MD
Nephrology
NPI 1558369231
901 BIESTERFIELD RD SUITE 310
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Raju Ray, MD
Nephrology
NPI 1487652186
901 BIESTERFIELD RD SUITE 310
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Renee Spacapan, APN
Nurse Practitioner
NPI 1669716452
901 BIESTERFIELD RD STE 402
Elk Grove Village, IL 60007
(847) 366-2484
✔ PECOS✔ Accepts Medicare12 mi
Elzbieta Stob, M.D.
Nephrology
NPI 1902255185
901 BIESTERFIELD RD STE 310
Elk Grove Village, IL 60007
(847) 952-9332
✔ PECOS✔ Accepts Medicare12 mi
Dione Valentino, FNP-BC
Nurse Practitioner
NPI 1205433448
3100 THEODORE ST STE 201
Joliet, IL 60435
(815) 744-5550
✔ PECOS✔ Accepts Medicare24 mi
See all 26 clinicians

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 Nani Elk Grove's NPI number?

The NPI number for Nani Elk Grove is 1154675528. It was assigned to this organization in the NPPES registry on November 6, 2012.

Where is Nani Elk Grove located?

Nani Elk Grove is located at 120 W 22nd St, Oak Brook, IL 60523. The listed phone number is (630) 573-5000.

What is Nani Elk Grove's specialty?

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

Is Nani Elk Grove enrolled in Medicare?

Yes. Nani Elk Grove is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Nani Elk Grove?

According to the CMS Revalidation Reassignment List (October 2026 release), 26 clinicians in 4 Medicare specialties reassign their Medicare billing to Nani Elk Grove. 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. The largest specialties are Nephrology (18), Nurse Practitioner (6) and Critical Care (Intensivists) (1). Of these, 12 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Nani Elk Grove was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.