Seng M Leong, MD
Seng M Leong, MD has been part of the Barrington medical community since 2006 in independent practice. With 57+ years of experience, he has been practicing in the Barrington area. He regularly sees Medicare patients with hypertension, high cholesterol, and arthritis (per CMS claims data).
At a glance
- Prescribes opioids less than 31% of reporting doctors in Illinois
- Uses generic medications more than 70% of reporting doctors in Illinois
- Virtual visits available — no app or travel required
Older · 402dNPPES updated 2025-03-31 · verify on CMS
Contact & Location
Practice Location
27750 W Highway 22, Barrington, IL 60010-2379
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better2.41%
Illinois avg: 4.5 · US avg: 5.1
✓ Higher than most doctors nationally(-2.7 pts)
2.41% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better91%
Illinois avg: 82.9 · US avg: 82.8
✓ Higher than most doctors nationally(+8.2 pts)
Better than 70% of reporting doctors in IllinoisHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
599
Unique beneficiaries
High volumePrescription Recipients
900
Patients prescribed
Prescriptions Written
15,286
Total claims
Total Medicare drug cost: $1.30M
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%↑ More patients than average (+4%) — 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 (+1%) — 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 (-8%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-6%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-10%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
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.
Board certified · Mar 30, 2025
CMS-verified certification date
57 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Mailing address
29373 Network Pl, Chicago, IL 60673-1293
Differs from practice location
Virtual Internal Medicine Care With Seng M Leong
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Seng M Leong for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Barrington 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 Seng M Leong
NPI records show Dr. Leong as active with telehealth listed in Barrington, IL. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (847) 381-5800.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator · HRSA HPSA. See Data Methodology.
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Contact Seng M Leong
Practice Location
27750 W Highway 22, Barrington, IL 60010-2379
Mailing Address
29373 Network Pl, Chicago, IL 60673-1293
This is a provider directory. Contact the office directly to schedule appointments.
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