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Profile last updated: March 2026How we source this data
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Provider Profile

Justin Mao, MD

Internal Medicine Physician

NPI: 1427052273

4

187 · US News

20

Years Exp.

Downers Grove

IL

Internal Medicine

Specialty

About

Dr. Justin Mao, MD, is a dedicated internal medicine physician located in Downers Grove, IL. With a focus on providing comprehensive care for adolescents, adults, and the elderly, Dr. Mao is skilled in managing common and complex illnesses. His extensive training allows him to diagnose and treat a wide range of conditions, including those affecting the heart, kidneys, and respiratory system.

With over 20 years of experience in the field, Dr. Mao has earned a patient rating of 4.0 out of 5, reflecting the satisfaction of his patients with his medical expertise and attentive bedside manner. Feedback highlights his ability to clearly explain medical conditions, ensuring that patients feel informed and cared for during consultations.

Dr. Mao is committed to promoting health and wellness through preventive care and thorough evaluations. While specific visit costs are not mentioned, patients can expect a focus on quality care tailored to their individual needs.

Practicing Since

Jun 2005

Gender

Male

Experience

20 years

IL Medical License

#036-124995

Practice Type

Group Practice

NPI Number

1427052273

Additional Specialties

Internal MedicineInternal MedicineInternal Medicine, Cardiovascular DiseaseInternal Medicine, Cardiovascular Disease

Additional Practice Locations

1340 CHARLES ST STE 300, ROCKFORD, IL 61104 · 815-490-5888

Avg. Self-Pay Rate

Self-pay rates shown are averages across all procedures on file for this provider, sourced from Transparency in Coverage Act data. These are cash-pay prices — what you'd typically pay without using insurance. Actual rates may vary by procedure, location, and date of service.

HYSTEROSCOPY BI TUBE OCCLUSION W/PERM IMPLNTS

CPT: 58565professional

$12,212

TX OPEN TENDON FLEXOR TOE 1 TENDON SPX

CPT: 28232professional

$2,815

Cost data sourced from insurer Transparency in Coverage Act filings. Costs shown are negotiated rates and may not reflect your actual out-of-pocket cost. Learn about our data

Local Market

Downers Grove Low

$83

Downers Grove Typical

$140

Downers Grove High

$204

In Downers Grove, a typical internal medicine physician visit costs $140, ranging from $83 to $204. This is 10% below the Illinois state median of $155. Based on 6 providers with published pricing data.

Illinois Low

$73

Illinois Typical

$155

Illinois High

$226

Across Illinois, a internal medicine physician visit ranges from $73 to $226 with a median of $155. This is 70% above the national median of $91. Based on 2,018 providers with published pricing data.

There is 1 internal medicine physician in Downers Grove and 17 across Illinois on our platform.

See full internal medicine physician cost breakdown in Illinois
Patient Reviews

4

187 reviews

US News

Dr. Justin Mao, MD, a cardiologist with over 20 years of experience, has received overwhelmingly positive feedback from his patients, reflected in a perfect rating of 5.0 from three reviews. Patients express high satisfaction with his ability to explain medical conditions clearly and his overall expertise in cardiology and clinical cardiac electrophysiology. Many appreciate his bedside manner, noting that he is attentive and thorough during consultations. Additionally, Dr. Mao practices at highly rated hospitals, which contributes to patient confidence in his care. While the reviews are predominantly positive, there are no specific criticisms mentioned in the available feedback. However, it is worth noting that Dr. Mao's practice is associated with multiple hospitals, including Advocate Good Samaritan Hospital and Edward Hospital, which are recognized for their cardiac care. This affiliation may enhance the overall patient experience, as patients report high satisfaction with the hospital services as well. Overall, those considering Dr. Mao for cardiology care can expect a knowledgeable and compassionate physician who is well-regarded by his patients.

Location

Address

3825 HIGHLAND AVE FL TOWER24

Downers Grove, IL 60515

Phone

6307194799
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Momentary Lab sources provider data from the CMS NPI Registry and cost data from federal Transparency in Coverage files. Reviews aggregated from Healthgrades, Vitals, WebMD, and other public sources. Learn how we verify and update healthcare information.

This page is for informational purposes only and does not constitute medical advice. Cost estimates are based on publicly available negotiated rate data and may not reflect your actual out-of-pocket cost. Always consult with your healthcare provider and insurance company for accurate cost information and medical decisions.