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Dr. Greg Jun, MD

Dr. Greg Jun, MD

Internal Medicine*
25+ years of experience

Dr. Greg Jun, MD is an internist in Crystal Lake, IL and has over 25 years of experience in the medical field. He graduated from Northwestern University Feinberg School of Medicine in 1997. He is affiliated with Northwestern Medicine McHenry Hospital. He is accepting new patients.

3.1 Star Rating
Based on 15 reviews 3.1 Star Rating (15 reviews)

Practice

650 Dakota St Ste A Crystal Lake, IL 60012
(815) 455-6000

At a Glance

  • Area of Expertise
    Dr. Jun specializes in the area of Internal Medicine. • See board certifications
  • Practices at Top Hospital
    America's 100 Best Hospitals Award™ • See hospitals
  • Good Patient Care
    Patients said they had exceptional care at this hospital. • See hospitals
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Dr. Jun's Reviews

Likelihood to recommend Dr. Jun

3.1

15 ratings, 7 with a written review
5 Star
47%
47%
4 Star
7%
7%
3 Star
0%
0%
2 Star
7%
7%
1 Star
40%
40%

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RecentHighestLowestMost Helpful
What went well
No results
What could be improved
  • Didn't trust the provider's decisions
2 people found this helpful
Helpful
Jan 04, 2023
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What went well
No results
What could be improved
No results
Helpful
Bill & Diane Stift – Feb 24, 2020
×Post a ResponseAre you Dr. Greg Jun, MD?
What went well
No results
What could be improved
No results
4 people found this helpful
Helpful
Debra M Luzinski – Oct 29, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
1 person found this helpful
Helpful
Carissa B – Sep 05, 2019
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What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
Helpful
May 31, 2019
×Post a ResponseAre you Dr. Greg Jun, MD?
What went well
No results
What could be improved
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
  • Long wait times
4 people found this helpful
Helpful
IL – Jan 11, 2019
×Post a ResponseAre you Dr. Greg Jun, MD?
What went well
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
  • Difficult to schedule appointment
  • Staff wasn't friendly
1 person found this helpful
Helpful
Kevin in Libertyville, IL – Apr 20, 2016
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Leave a review

How was your experience with Dr. Jun?

Know Before You Go

About Me

biography

Dr. Greg Jun, MD is an internist in Crystal Lake, IL and has over 25 years of experience in the medical field. He graduated from Northwestern University Feinberg School of Medicine in 1997. He is affiliated with Northwestern Medicine McHenry Hospital. He is accepting new patients.

  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Luth Gen Hospital

    Residency Hospital, 2001

  • Northwestern University Feinberg School Of Medicine

    Medical School, 1997

  • Northwestern University Feinberg School Of Medicine

    Undergraduate School, 1993
American Board of Medical Specialties®
American Board of Internal Medicine®
- 
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. Information last updated March 29, 2025. To learn more about the difference between these sources, please refer to our FAQs.
Board actions foundState licensing board
Within the last year
Florida Board of Medicine
Within the last one to three years
Illinois Department of Financial and Professional Regulation

Healthgrades receives board action history for physicians and physician assistants. The information displayed here is sourced from independent information providers, such as state board websites, and may not be the most up-to-date information. Healthgrades makes no representations with respect to the accuracy of any information provided here and assumes no responsibility or liability for such information.

Learn more about medical license public record check

  • English

  • Korean

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Locations

Practice

Ambassador Hospital Care LLC650 Dakota St Ste A Crystal Lake, IL 60012
1

Practice

Office779 Kristine Way The Villages, FL 32163
2
Unavail1050 Old Camp Rd The Villages, FL 32162
3
Office1020 Lake Sumter Lndg The Villages, FL 32162
4

Affiliated Hospitals

  • Northwestern Medicine McHenry Hospital

    4201 W Medical Center Dr
    McHenry, IL 60050
    Recipient of 33
    hospital awards

    America's 100 Best Hospitals Award™ (2025)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    America's 250 Best Hospitals Award™ (2025, 2024, 2023)

    Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

    View all awards

    How patients felt about the care they received at this hospital.

    88%
    Patients said they were given information about recovering at home

    4% higher than the national average

    79%
    Patients said that nurses always listened to them and explained things well

    4% higher than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality