Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Stephen Nierzwicki, M.D.

Cardiovascular Disease Physician in Winfield, IL · enumerated 2008 · practices at Medtech Billing Pros LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1194985564

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Stephen Nierzwicki

Credential M.D.

Sex Male

Practice address 25 N Winfield Rd Ste 500, Winfield, IL, 60190

Phone (630) 232-0280

Fax (630) 232-3895

Enumeration date Jun 10, 2008

Last updated in NPPES Jun 3, 2024

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036123450 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
036123450	Medicaid	IL	-
206147125	Other	IL	MEDICARE PTAN (INDIVIDUAL)
206147	Other	IL	MEDICARE PTAN (GROUP)

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Robert Nierzwicki?

The National Provider Identifier (NPI) for Robert Nierzwicki is 1194985564, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Nierzwicki practice?

The practice location on file with NPPES is in Winfield, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Michael Severino Cardiovascular Disease Physician · Winfield, IL NPI 1174591531 Manfred Pyka Cardiovascular Disease Physician · Winfield, IL NPI 1396796389 Robin Fortman Nurse Practitioner · Winfield, IL NPI 1740210558 Pamela Papp Family Nurse Practitioner · Winfield, IL NPI 1992717888 Michelle Montpetit Advanced Heart Failure and Transplant Cardiology Physician · Winfield, IL NPI 1447329933 Janki Gandhi Physician Assistant · Winfield, IL NPI 1962556944 Susan Collazo Nurse Practitioner · Winfield, IL NPI 1043422819 Amita Singh Cardiovascular Disease Physician · Winfield, IL NPI 1952577504

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-03.