James Ralph Clark, M.D.
Gastroenterology Internal Medicine
James Ralph Clark is a Gastroenterology Internal Medicine specialist based in Downers Grove, IL with over 36 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
James Ralph Clark, M.D. practices as part of a group gastroenterologist practice in Downers Grove, IL. Trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1990), he has been practicing for over 36 years. Among his Medicare patients, common conditions include hypertension, high cholesterol, and arthritis (per CMS data).
At a glance
- Uses generic medications more than 31% of reporting doctors in Illinois
- Virtual visits available — no app or travel required
Older · 6895dNPPES updated 2007-07-08 · verify NPI on CMS · Verify license at Illinois Department of Financial & Professional Regulation — Medical
Contact & Location
Practice Location
3825 Highland Ave Tower 2 - Suite 302, Downers Grove, IL 60515-1552
How Does This Doctor Compare?
Based on Medicare data, this doctor favors affordable generic drugs over brand-name ones.
Generic Rx
↑ Higher = better84.3%
Illinois avg: 82.9 · US avg: 82.8
✓ Higher than most doctors nationally(+1.5 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
492
Unique beneficiaries
Standard volumePrescription Recipients
351
Patients prescribed
Prescriptions Written
775
Total claims
Total Medicare drug cost: $407k
Percentile rankings compared against 2,844 reporting peers in Illinois.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-2%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+8%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+5%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%Conditions affecting emotional state, including depression and bipolar disorder
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-2%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.3k received from industry
65 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to James Ralph Clark's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1990
University of Illinois College of Medicine
36 years in practice
Senior practitioner
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Education & Training
University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (Class of 1990)
Virtual Internal Medicine Care With James Ralph Clark
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with James Ralph Clark for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Downers Grove required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about James Ralph Clark
NPI records show Dr. Clark as active with telehealth listed in Downers Grove, IL. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (630) 434-9312.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact James Ralph Clark
Practice Location
3825 Highland Ave Tower 2 - Suite 302, Downers Grove, IL 60515-1552
Mailing Address
3825 Highland Ave Tower 2 - Suite 302, Downers Grove, IL 60515-1552
This is a provider directory. Contact the office directly to schedule appointments.
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