Loading Complete
Karen Halasan

Karen Halasan, MD

Pulmonary Critical Care

Accepting New Patients
Online Booking

Highlights

Age Groups Seen

  • (Young) Adult 18-21
  • Adult 18-65
  • Older Adult >65

Languages

  • Filipino
  • English

Gender

Female

Hospital Affiliations

  • Nuvance Health - Norwalk Hospital

About Karen Halasan

Professional Statement

Dr. Karen Halasan is a board-certified pulmonologist and intensivist. She is passionate about her work, advocates for her patients and loves to teach and educate students and patients. She feels that patients who are educated will be more successful in managing their diseases. She is originally from the Philippines and speaks Tagalog and Cebuano fluently. She comes down from the Greater Hartford area, where she has been practicing for the past 10 years.

Get To Know Me

Why should someone choose you to care for their health?
I listen attentively and work to build strong, lasting relationships with my patients.

What is the most important thing your patients should expect from their professional relationship with you? What do you expect from them?
I take the time to explain the prognosis of my patients' diseases clearly. I aim to educate them about their condition and help them better understand.

How do you spend your valuable personal time when you’re not caring for patients?
I love to travel with my husband. We love to do outdoor activities like hiking and national parks.

Why did you choose your specialty and what is its greatest reward?
I choose Pulmonary/Critical Care medicine because of my passion to help the sickest and see them through the toughest times. I like both inpatient and outpatient medicine. I feel that I build a relationship with my patients and their families from the ICU/hospital to the clinic.

Expertise

Education

  • Fellowship: Augusta University Medical College of Georgia, Pulmonary and Critical Care Medicine, 2014
  • Residency: University of Connecticut Health Center, Internal Medicine, 2011
  • Medical School: University of Santo Tomas, 2005

Board Certifications

  • Pulmonary Disease: American Board of Internal Medicine
  • Internal Medicine: American Board of Internal Medicine
  • Critical Care Medicine: American Board of Internal Medicine

Locations

  1. Nuvance Health Medical Practice - Pulmonary and Sleep Medicine Norwalk (Cross St.)
Need help scheduling? Call 203-852-2392

Insurance

Note: All providers do not participate with all Insurance Plans, Insurance Plan Products or Employer Groups. Please contact the doctor's office directly to confirm acceptance of your specific insurance plan.
Search plans
  • Aetna
  • Anthem BlueCross Blue Shield Connecticut
  • Centivo
  • Cigna
  • ConnectiCare
  • Consumer Health Network
  • Coventry-Aetna
  • Medicaid Connecticut
  • Medicare Connecticut
  • Medicare Railroad
  • Multiplan Inc
  • Northwell Direct
  • Oxford Health Plans
  • Tricare Humana Military
  • United Healthcare
  • US Family Health Plan
  • Wellcare

Ratings & Reviews

4.9 out of 5

50 ratings, 11 reviews

Provider star ratings are calculated using patient responses to the provider care questions in our patient experience survey. Below you can see the provider’s star rating and the number of his or her patients who have provided feedback. Ratings depicted represent those clinicians that have at least 30 completed surveys on a rolling 12 month basis.

Doctor Spent Enough Time Recently
Composite
Doctor Explain Recently
Search reviews
    5 out of 5 stars
    Reviewed on 12/11/2025

    She cares

    5 out of 5 stars
    Reviewed on 12/8/2025

    She was exactly what I was looking for . Explained what happened and will talk with own doctor. .

    5 out of 5 stars
    Reviewed on 12/1/2025

    She is a caring doctor, explained my situation until i understood, listened to my concerns, and started me on helpful medication.

    5 out of 5 stars
    Reviewed on 7/16/2025

    Had a good visit and will have a follow up visit next month.

    5 out of 5 stars
    Reviewed on 7/16/2025

    This was a first time visit. Dr. Halasan was very thorough, answered all my questions and explained in simple terms what I needed to do.

    5 out of 5 stars
    Reviewed on 6/16/2025

    Dr Halasan was compassionate and professional. I appreciated her honesty and concern. I’m looking forward to working with her again.

    5 out of 5 stars
    Reviewed on 6/12/2025

    Professional, kind, nice, involved in the best interest of my career.

    5 out of 5 stars
    Reviewed on 6/11/2025

    She is a very caring and knowledgeable doctor who take the time to listen to your concerns, addresses them and helps you with any tough decision making you need to do.

    5 out of 5 stars
    Reviewed on 3/31/2025

    She was great. Very detailed.& thorough. Spent a great deal of time examining me. Concerned & caring.

    5 out of 5 stars
    Reviewed on 3/17/2025

    She spent an unusual amount of time with me and answered all my questions.

    5 out of 5 stars
    Reviewed on 3/16/2025

    Wonderful visit; I couldn't be more grateful.