Mark Demeo, M.D.
Gastroenterology Internal Medicine
Mark Demeo is a Gastroenterology Internal Medicine specialist based in Chicago, IL with over 43 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Mark Demeo, M.D. has practiced internal medicine for 43+ years, working in group practice. Trained at Rutgers New Jersey Medical School (class of 1983), he has been practicing for over 43 years. Among his Medicare patients, common conditions include high cholesterol, hypertension, and arthritis (per CMS data).
Older · 6894dNPPES updated 2007-07-08 · verify NPI on CMS · Verify license at Illinois Department of Financial & Professional Regulation — Medical
Contact & Location
Practice Location
1725 W Harrison St Suite 207, Chicago, IL 60612-3841
How Does This Doctor Compare?
Generic Rx
↑ Higher = better62.6%
Illinois avg: 82.9 · US avg: 82.8
⚠ Lower than most doctors nationally(-20.2 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
405
Unique beneficiaries
Standard volumePrescription Recipients
293
Patients prescribed
Prescriptions Written
941
Total claims
Total Medicare drug cost: $989k
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 High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↑ More patients than average (+3%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-3%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-7%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-13%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-10%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1983
Rutgers New Jersey Medical School
43 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
Rutgers New Jersey Medical School (Class of 1983)
Virtual Internal Medicine Care With Mark Demeo
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mark Demeo for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Chicago 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 Mark Demeo
Dr. Demeo is listed as active in the NPI registry with telehealth listed in Chicago, IL. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (312) 942-5861.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Contact Mark Demeo
Practice Location
1725 W Harrison St Suite 207, Chicago, IL 60612-3841
Mailing Address
1725 W Harrison St Suite 207, Chicago, IL 60612-3841
This is a provider directory. Contact the office directly to schedule appointments.
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