Dr. James A. Stim, MD
- Medicare services, 2024
- 3,282
- Medicare patients, 2024
- 792
- Part D claims, 2024
- 1,686
- Hospital affiliations
- 5
- Industry payments
- $274
- Practice address
- 612 Roxbury Rd, Rockford, IL 61107
- Practice phone
- Call (815) 397-0713
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Roxbury Dialysis Center
Rockford, Illinois
Find Dr. Stim's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. James A. Stim is a nephrologist in Rockford, Illinois
Dr. Stim practices at Roxbury Dialysis Center in Rockford, Illinois.
Dr. Stim's NPI, 1104827427, was assigned on August 9, 2005. Dr. Stim graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1987. Dr. Stim holds Illinois license 036078891.
- NPI
- 1104827427NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547170623
- NPI enumeration date
- August 9, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 397-0713
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James A. Stim practices at Roxbury Dialysis Center in Rockford, Illinois
Dr. Stim's primary practice is Roxbury Dialysis Center, at 612 Roxbury Rd, Rockford, IL 61107 in Winnebago County. The practice phone is (815) 397-0713.
- Roxbury Dialysis Center612 Roxbury Rd, Rockford, IL 61107 · Winnebago CountyPhone(815) 397-0713
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. James A. Stim is affiliated with 10 sites of care and 1 medical group
Dr. Stim's primary practice is Roxbury Dialysis Center in Rockford, Illinois. Dr. Stim is also affiliated with UW Health SwedishAmerican Hospital. The medical group on file is Rockford Nephrology Associates. Dmand AI also links Dr. Stim to 4 more hospitals, 3 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James A. Stim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stim practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Roxbury Dialysis Center | Available with a free account |
| +9 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James A. Stim is one of 534 nephrologists in Illinois
Nephrology is Dr. Stim's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Stim is licensed in Illinois.
Specialties and state licenses
- Nephrology, IllinoisPrimary
Nephrologists near Dr. Stim
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James A. Stim billed Medicare for 3,282 services in 2024
CMS data shows 3,282 Medicare services from Dr. Stim across 15 procedure codes in 2024, for 792 Medicare patients. Medicare paid $270,835 for them.
Dr. Stim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,0162024: 2,42320%
- Other services
- 2023: 02024: 513
- Tests and treatments
- 2023: 3932024: 32118%
- Lab and pathology
- 2023: 242024: 254%
- Imaging
- 2023: 172024: 0100%
Where Dr. Stim's Medicare services took place, 2024
- In an office2,54778%
- In a facility73522%
Dr. Stim compared with the Illinois median for nephrologists, 2024
- Dr. Stim
- Illinois median
- Medicare services
- 3,282vs 1,2842.6 times
- Medicare patients
- 792vs 3572.2 times
- Part D claims
- 1,444vs 5782.5 times
Medians across 526 nephrologists in Illinois with Dmand AI profiles that report each measure.
Dr. Stim's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Stim?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Stim and other nephrologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James A. Stim treated 792 Medicare patients in 2024, average age 75
CMS counts 792 Medicare patients who saw Dr. Stim in 2024. The largest group is 75 to 84, with 316 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 23% are also on Medicaid. Their average risk score is 3.37, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Stim's median patient age at 73, with 51% women.
Dr. Stim's Medicare patients by age, 2024
Dr. Stim's Medicare patients by sex, 2024
- Women40251%
- Men39049%
Chronic conditions among Dr. Stim's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes56%
- Arthritis48%
- Heart failure48%
- Ischemic heart disease47%
- Atrial fibrillation36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Stim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James A. Stim wrote 1,686 Medicare Part D claims in 2024
In 2024, Dr. Stim wrote 1,686 Medicare Part D claims for 376 patients. 90% of them were for generic drugs. CMS names the drug for 1,444 of them, across 27 drugs with 11 or more claims each, at $99,734 in total drug cost. In 2023, CMS named 1,599 claims across 32 drugs.
Dr. Stim's Part D claims by kind of drug, 2024
- Generic1,510 claims90%
- Brand-name176 claims10%
Dr. Stim's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Stim's Part D claims, 2024
- Antibiotics2%39 of 1,686 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,5992024: 1,44410%
Drugs named by CMS: 27 in 2024, 32 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. James A. Stim takes part in Medicare
Dr. Stim accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. James A. Stim received $274 in industry payments from 2017 to 2018
CMS Open Payments shows 3 general payments to Dr. Stim from 3 drug and device companies from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. OPKO Pharmaceuticals, LLC paid the most, $101.
General payments to Dr. Stim by program year, 2017 to 2018
Companies that paid Dr. Stim the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James A. Stim graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Stim graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James A. Stim's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. James A. Stim
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. James A. Stim's NPI number?
Dr. James A. Stim's NPI number is 1104827427. It was assigned on August 9, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. James A. Stim?
Dr. James A. Stim is a nephrologist in Rockford, Illinois. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. James A. Stim practice?
Dr. Stim practices at 612 Roxbury Rd, Rockford, IL 61107. Dr. Stim's primary practice is Roxbury Dialysis Center in Rockford, Illinois. Dmand AI also links Dr. Stim to 4 hospitals, 3 dialysis centers and 1 group practice or clinic.
What is Dr. James A. Stim's office phone number?
The practice phone on file for Dr. Stim is (815) 397-0713.
What is Dr. James A. Stim's medical license number?
Dr. Stim holds Illinois license 036078891.
Which hospitals is Dr. James A. Stim affiliated with?
Dr. Stim is affiliated with UW Health SwedishAmerican Hospital. Dmand AI links Dr. Stim to 4 more hospitals.
What medical group is Dr. James A. Stim part of?
Dr. Stim is linked to Rockford Nephrology Associates.
Does Dr. James A. Stim accept Medicare?
Yes. CMS data shows Dr. Stim billed Medicare for 3,282 services in 2024, and Dr. Stim accepts Medicare assignment.
How many Medicare patients does Dr. James A. Stim see?
CMS counts 792 Medicare patients who saw Dr. Stim in 2024, with an average age of 75.
What services does Dr. James A. Stim bill to Medicare?
In 2024, Dr. Stim's most billed Medicare services were care management and other visits (99490), office visit, established patient (99214) and medicare service (G2211).
Show 4 more questionsShow fewer questions
Where did Dr. James A. Stim go to medical school?
Dr. Stim graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1987.
What drugs does Dr. James A. Stim prescribe most?
In 2024 Medicare Part D data, Dr. Stim's most prescribed drugs by claims were Calcitriol, Amlodipine Besylate and Furosemide.
Has Dr. James A. Stim received payments from drug or device companies?
CMS Open Payments shows $274 in general payments to Dr. Stim from 3 companies from 2017 to 2018. The largest total came from OPKO Pharmaceuticals, LLC.
How long has Dr. James A. Stim been practicing?
Dr. Stim graduated from medical school in 1987, 39 years ago.
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