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Dr. Karen Mrejen, MD

Internal Medicine* Age 57
Dr. Karen Mrejen, MD
3.7 (3 Ratings)
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Dr. Karen Mrejen, MD is an Internist in Bay Shore, NY.
Dr. Karen Mrejen, MD
3.7 (3 Ratings)
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Dr. Karen Mrejen, MD

Internal Medicine* Age 57
Bay Shore, NY
Accepting new patients
30 years of experience
Dr. Karen Mrejen, MD is an Internist in Bay Shore, NY.

About

Dr. Mrejen graduated from ALBANY MEDICAL COLLEGE. Dr. Karen Mrejen, MD is an Internist in Bay Shore, NY and has 30 years experience. Dr. Mrejen currently practices at Northwell Health Physician Partners Pulmonary and Sleep Medicine at Bay Shore and are affiliated with Glen Cove Hospital, Long Island Jewish Medical Center, North Shore University Hospital and South Shore University Hospital. Dr. Mrejen has experience treating conditions like Muscle Cramping and Asthma among other conditions at varying frequencies. At present, Dr. Mrejen received an average rating of 3.7/5 from patients and has been reviewed 3 times. Dr. Mrejen's office accepts new patients. Dr. Mrejen also speaks French. Dr. Mrejen is board certified in Critical Care Medicine and accepts multiple insurance plans.

Friendly Staff

Patients said the staff was friendly.

Easy Scheduling

Patients said scheduling was easy.

Experience Check

Enter a condition or procedure
Muscle Cramping
Asthma
Shortness of Breath
Muscle Cramping
Asthma
Shortness of Breath
Muscle Cramping
Asthma
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Shortness of Breath
Acidosis
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Benign Pleural Neoplasm
Bronchiectasis
Bronchitis
Bronchospasm
COPD (Chronic Obstructive Pulmonary Disease)
Emphysema
Interstitial Lung Disease
Long COVID Disorder
Lung Cancer
Pleural Effusion
Pneumoconiosis and Pneumonopathy
Pneumonia
Respiratory Failure
Sleep Apnea
Tobacco Use Disorder
Wheezing
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Arterial Blood Gas Test (ABG)
Electrocardiogram (EKG)
Immunization Administration
Sleep Study
Smoking Cessation Counseling
Abdominal Pain
Achlorhydria
Acute Bronchitis
Acute Deep Vein Thrombosis (DVT)
Acute Lower Respiratory Infection
Acute Pharyngitis
Acute Respiratory Infection
Acute Upper Respiratory Infection
Acute Venous Embolism Thrombosis
Administrative Physical
Air and Gas Embolism
Alkalosis
All Headaches (incl. Migraine)
Amenorrhea
Anal or Rectal Pain
Asbestosis
Aspergillosis
Asphyxia and Hypoxemia
Benign Lung Neoplasms
Biliary Tract Cancer
Bird Flu
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Bone Cancer
Breast Cancer
Breast Lump
Bronchiolitis
Cachexia
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Chest Pain
Chlamydial Pneumonia
Cholecystitis and Gallstones
Chronic Bronchiolitis
Chronic Bronchitis
Chronic Deep Vein Thrombosis (DVT)
Chronic Pulmonary Embolism
Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
Chronic Sinusitis
Chylothorax
Cluster Headache
Collapsed Lung (Pneumothorax)
Colorectal Cancer
Constipation
Cough
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Croup
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Dehydration
Diaphragmatic and Hiatal Hernia
Esophageal Varices
Exercise Induced Asthma
Familial Hypercholesterolemia
Fever
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Foot Sprain
Gallstones
Gastroptosis
German Measles
Gonococcal Pneumonia
Hepatopulmonary Syndrome
Hiatal Hernia
Hypersensitivity Pneumonitis
Hypoxemia
Ileus
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Impairments of Consciousness
Incisional Hernia
Influenza (Flu)
Intestinal Obstruction
Joint Pain
Limb Pain
Liver Cancer
Lung Nodule
Lymphangioma
Metastatic Respiratory System Cancer
Muscle Spasm
Mycobacterial Lung Infection
Nail Infection
Nausea
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Onychogryphosis
Osteosarcoma
Pancreatic Cancer
Partial Lung Collapse
Peptic Ulcer
Peripheral Vascular Disease (PAD, PVD)
Pharyngitis
Pleura Cancer
Pleurisy
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Pneumonitis
Pneumonitis (Due to Solids or Liquids)
Primary Pulmonary Hypertension
Primary Sclerosing Cholangitis
Pulmonary Edema
Pulmonary Embolism
Pulmonary Eosinophilia
Pulmonary Hypertension
Pulmonary Insufficiency
Rhabdomyolysis
Rheumatoid Lung Disease
Rib Fracture
Sarcoidosis
Scleroderma
Secondary Hypertension
Secondary Malignancies
Sleep Related Hypoxemia
Stomach and Small Intestine Cancer
Stomach Cancer
Strep Throat
Swine Flu
Testicular Cancer
Thrush
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Thyroid Cancer
Tracheitis
Traumatic Brain Injury
Traumatic Brain Injury (TBI)
Tuberculosis
Tubo-Ovarian Abscess
Umbilical Hernia
Urinary Incontinence
Urinary Tract Infection (UTI)
Venous Embolism and Thrombosis
Ventral Hernia
Advance Directive End of Life Planning
Bronchoscopy
Bronchoscopy with Robotic Assist
Continuous Positive Airway Pressure (CPAP)
Non-Invasive Mechanical Ventilation
Obesity Counseling
Pulmonary Rehabilitation Services
Respiratory Management
Thoracentesis

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • MVP Health Care
  • Cigna
  • Aetna
  • Medicaid
  • Humana
  • Affinity Health Plan
  • MagnaCare
  • United Healthcare
  • Tricare
  • HIP
  • Oxford Health Plans

Patient Satisfaction

Likelihood to recommend Dr. Mrejen
3.7
Based on 3 Reviews
5 Stars (2)
4 Stars (0)
3 Stars (0)
2 Stars (0)
1 Star (1)

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Patient Reviews
Jun 08, 2021
Takes a lot of time to learn your history and run tests before diagnosing. Very kind and understanding.
— Jun 08, 2021
See more reviews on Healthgrades
Photo: Dr. Karen Mrejen, MD
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Dr. Mrejen's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Mrejen

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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About Me

Languages Spoken
French
Languages Spoken
Specialties*
Internal Medicine
Pulmonary Disease
Critical Care Medicine
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • ALBANY MEDICAL COLLEGE
    1995
Medical Education

Board Certifications

Board Certifications
  • Critical Care Medicine, Internal Medicine and Pulmonary Disease
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Mrejen communicate via email?
No users said yes.
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Does Dr. Mrejen offer telehealth services or virtual visits?
No users said yes.
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Does Dr. Mrejen offer an online patient portal?
No users said yes.
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Does Dr. Mrejen have free onsite parking?
1 user said yes.
Yes
(1)
No
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Does Dr. Mrejen offer weekend visits?
No users said yes.
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Does Dr. Mrejen offer evening visits?
No users said yes.
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(0)
No
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Does Dr. Mrejen specialize in working with children or adolescents?
No responses yet.
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Does Dr. Mrejen specialize in working with seniors?
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Does Dr. Mrejen specialize in couples therapy?
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Does Dr. Mrejen specialize in working with LGBTQ+ community?
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Does Dr. Mrejen accept insurance?
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Karen Mrejen, MD. To arrange an appointment, call the number on Dr. Mrejen's profile.

Dr. Mrejen frequently treats the following conditions: Muscle Cramping and Asthma. See more on Sharecare.

Dr. Karen Mrejen, MD is affiliated with Glen Cove Hospital, Long Island Jewish Medical Center, North Shore University Hospital and South Shore University Hospital.

Yes, Dr. Karen Mrejen, MD holds board certification in Critical Care Medicine, Internal Medicine and Pulmonary Disease.

Hospital Affiliations

  • Glen Cove Hospital

    101 Saint Andrews Ln, Glen Cove, NY

  • Long Island Jewish Medical Center

    270 05 76 Ave, New Hyde Park, NY

  • North Shore University Hospital

    300 Community Dr, Manhasset, NY

  • South Shore University Hospital

    301 E Main St, Bay Shore, NY