Dr. Dennis Kellar, MD

Dr. Dennis Kellar, MD

Critical Care Medicine  ·  
Male  ·  
Age 49
Dr. Dennis Kellar, MD is a critical care medicine specialist in Crystal Lake, IL and has been practicing for 14 years. He graduated from Ross U Sch Of Med in 1997 and specializes in critical care medicine, pulmonary disease, and more.

360 Station Dr Ste 235

Crystal Lake, IL 60014

Contact Information

(815) 477-7350

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • Coventry Health Care
  • First Health (Coventry Health Care)
  • HealthLink
  • Humana
  • MultiPlan
  • Priority Health

*Please verify this information when scheduling an appointment.

Learn about Dr. Kellar

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.

Dr. Kellar's Experience

Dr. Kellar's experience matches your search based on the following criteria:
  • Based on total number of patients treated over the last 12 months
  • Specializes in Critical Care Medicine
  • No malpractice claims found
  • No sanctions found
  • No board actions found

3  Specialties

  • Critical Care Medicine
  • Pulmonary Disease
  • Sleep Medicine

0  Board Certifications

Dr. Kellar does not have any board certifications listed.

56  Conditions Treated

Read Less

6  Procedures

Background Check

0 Malpractice Claims

No malpractice history found for Illinois.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Ross U Sch Of Med
    Medical School | Graduated 1997
  • Cook Cty Hosp
    Internship Hospital | Completed
  • Cook Cty Hosp
    Residency Hospital | Completed 2001
  • Rush University Medical Center
    Fellowship Hospital | Completed 2004

Awards & Recognition

Awards & Honors

Dr. Kellar has no awards or honors listed.

Media & Publications

Dr. Kellar has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Kellar does not have any memberships or affiliations listed. If you are Dr. Kellar and would like to add memberships or affiliations, please update your profile.

Dr. Kellar's Reviews

Likelihood of recommending Dr. Kellar to family and friends
34 total reviews (9 have comments)

Likelihood to Recommend (34)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Kellar's Performance

  • Trustworthiness

  • Explains condition(s) well

  • Answers questions

  • Time well spent


Office & Staff Performance

  • Scheduling

  • Office environment

  • Staff friendliness

  • Average wait time

    16 to 30 minutes

Patient Comments (9)

Dr Kellar is excellent. However it has been a month since my visit and I still cannot get my test results. His staff never called - whencalled I was told I could not speak to the dr - as in” he does not do that”. Really- he doesn’t ever talk on a phone?? So I filled out a form so they could...more
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Sadly I spent 11/2 years under the care of Dr. K for sleep apnea and didn't improve but actually got worse. I received little education on the dos and donts like not letting pets in your bed. Though I complained about not feeling refreshed when I awoke, Dr. K never tried changing the pressures....more
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Warm, compassionate doctor.
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Initial meetings (2) were fine. Would you wait for OVER an hour in an exam room and have no one tell you what's going on? Would you accept a doctor who says that your numbers a fine despite the fact that you're telling the doctor that you aren't getting any sleep? Would you trust a doctor who...more
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Dr. Kellar seems to be both personable and knowledgeable. I have tremendous faith in him. I have found that his office and support staff is just terrible. There is a tremendous disconnect between Doctor, staff, and patient. Why should a simple question take multiple calls to the office and...more
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