Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

James Stim, MD

Individual provider Nephrology Physician · NPI 1104827427

James Stim, MD is a Nephrology in Rockford, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1987, 39 years ago. Practices with Rna of Rockford, PLLC, an 18-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
39
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

612 Roxbury Rd
Rockford, IL 61107-5089
Phone: (815) 227-8300
Fax: (815) 227-8301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036078891 (IL)

Record details

NPI number1104827427
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 9, 2005
Last updated in NPPESApril 22, 2011
Mailing address612 Roxbury Rd, Rockford, IL 61107-5089

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1987 (39 years in practice)
Group practice Rna Of Rockford, Pllc — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Rockford