We are partnered with the following hospital systems:

Northwestern Medicine Huntley hospital
Northwestern Medicine McHenry Hospital

(Preferred providers for NM Employees)

Advocate Good Shepherds Hospital
Advocate Sherman Hospital
Amita St. Alexius Medical Center
Amita Alexian Brothers Medical Center

Have questions?
You can now text us! 



    1. "Very nice staff. They helped me out a lot and explained everything very well to me."

    2. Danielle M Google

    1. "Dr. Kellar and Amanda Law are great. Great sincere staff too."

    2. Jaclyn S. Google

    1. "Dr. Kellar is a warm, compassionate doctor."

    2. Verified Patient Healthgrades

Welcome to Northwest Pulmonary and Sleep Medicine

We offer the following:

  • In-office appointments and testing
  • Same Day Sick Visits
  • Virtual Visits
  • CPAP supplies for commercially insured patients
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Northwest Pulmonary and Sleep Medicine

We offer the following:

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What we offer


Our Team

We are here to help

  • Kelli  Arnolde, CMA, XRT
    Kelli Arnolde, CMA, XRT
    Lead Medical Assistant
  • Jen  Bradt, RPSGT
    Jen Bradt, RPSGT
    Practice Administrator
  • Jennifer  Cantu, CRT, RCP
    Jennifer Cantu, CRT, RCP
    Clinical Coordinator
  • Trisha   Herner
    Trisha Herner
    Billing Assistant
  • Donna   Schaffer
    Donna Schaffer
  • Nicole  Kostic, RPSGT
    Nicole Kostic, RPSGT
    CPAP Supply Coordinator
  • Dawn   Udesen
    Dawn Udesen
    Billing Manager
  • Cori  Jansen, RPSGT
    Cori Jansen, RPSGT
    Lead Sleep Technologist
  • Ramiro  Correa
    Ramiro Correa
    CPAP Specialist
  • Becky  Lischalk
    Becky Lischalk
    Certified Medical Assistant
  • Norma  Morales-Valaquez
    Norma Morales-Valaquez
    Reception Coordinator
  • Erica  Guzman
    Erica Guzman
    Lead Scheduler
  • Laurie  Pardo, RN, BSN
    Laurie Pardo, RN, BSN
    Triage Nurse
  • Debbie   Smith, RN
    Debbie Smith, RN
    Triage Nurse
  • Ellie  Rubio
    Ellie Rubio
    Certified Medical Assistant
  • Jennifer  Aranada
    Jennifer Aranada
    Certified Medical Assistant

Patient Portal

We are pleased to provide patients with secure, 24/7 access to their health records. Patients can safely and easily:

  • Update insurance/demographic information
  • Review financial statements/make secure payments
  • View lab and test results
  • Access relevant health education materials

Patient Login

Read more


At Northwest Pulmonary and Sleep Medicine, we accept Medicare and most major insurance plans. Please contact your insurance company or you may call our office at 8154777350 to find out if we accept your insurance plan. If your insurance plan requires you to pay a co-payment, co-insurance, and/or a deductible, you will need to pay at the time of your visit. For your convenience we accept cash, checks, Visa, and MasterCard. If you have a question related to your bill or insurance, please call our office and ask to speak to the billing department.



Signs You Have Restless Leg Syndrome

Do you struggle with an overwhelming urge to move your legs? You may be among the millions of Americans with restless leg syndrome. Learn the signs of this condition and how it can be treated

Taking Care of Your CPAP Machine

If you have sleep apnea, your doctor may have prescribed a continuous positive airway pressure (CPAP) machine to help you breathe easier while you sleep. Here’s what you need to know about caring for your machine.

Complications of Sleep Apnea

If you have sleep apnea, putting an end to your snoring may be your biggest concern. But, this sleeping disorder can actually cause many more health issues. Read on to learn what they are and how you can treat this condition.


Words from our patients

  • Google

    "Amanda Law has been my practitioner and she exhibits great knowledge and patience in determining an individual treatment plan that works for you."

    Anne M
  • Vitals

    "Dr. Kellar gave me a thorough exam and explanation of my health issues, he was was exceptional. His assistant and front office staff were great."

    Verified Patient
  • Vitals

    "The staff was really nice, especially Melissa. One of the best experiences I've had at a doctors office in a while...""

    Verified Patient
Northwest Pulmonary and Sleep Medicine
1340 Ryan Parkway
Algonquin, IL 60102
Phone: 815-770-2001
Fax: (815) 477-7351
Office Hours

Get in touch