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Dr. Mary Johnstone, MD
Emergency Medicine* Age 46
Dr. Mary Johnstone, MD
5.0 (1 Ratings)
Map Pin Small Mineola, NY
Dr. Mary Johnstone, MD is an Emergency Medicine Specialist in Mineola, NY.
Dr. Mary Johnstone, MD
5.0 (1 Ratings)

Dr. Mary Johnstone, MD

Emergency Medicine* Age 46
Mineola, NY
Accepting new patients
18 years of experience
Dr. Mary Johnstone, MD is an Emergency Medicine Specialist in Mineola, NY.

About Dr. Mary Johnstone, MD

Dr. Johnstone graduated from University of Missouri. Dr. Mary Johnstone, MD is an Emergency Medicine Specialist in Mineola, NY and has 18 years experience. Dr. Johnstone currently practices at Winthrop University Hospital and is affiliated with NYU Langone Hospitals. Dr. Johnstone's office accepts new patients. Dr. Johnstone is board certified in Emergency Medicine.

Compare with other Emergency Medicine Specialists

Compare Dr. Johnstone with our nearby Emergency Medicine Specialists at Mount Sinai Morningside
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Dr. Melissa Leber, MD
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These providers are on the medical staff of Mount Sinai Morningside
These providers are on the medical staff of Mount Sinai Morningside.
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Experience Check

Enter a condition or procedure
Chest Pain
Shortness of Breath
Facial Fracture
Chest Pain
Shortness of Breath
Facial Fracture
Chest Pain
Shortness of Breath
Facial Fracture
Burn Injuries
Dehydration
Anaphylaxis
Asphyxia and Hypoxemia
Broken Nose
Collapsed Lung (Pneumothorax)
Drug Withdrawal
Embolism
  • View other providers who treat Embolism
Heart Attack (Acute Myocardial Infarction)
Humerus Fracture
Impairments of Consciousness
Jaw Fracture
Maxillary and Malar Fractures
Opioid Withdrawal
Orbital Fracture
Paraphimosis
Partial Lung Collapse
Pleural Effusion
Pulmonary Edema
Respiratory Failure
Rhabdomyolysis
Stroke
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Ventricular Tachycardia (VT)
Detoxification Evaluation
Thoracentesis

Accepted Insurance Plans

* Please verify this information when scheduling an appointment.
  • MVP Health Plan EPO

Where Dr. Mary Johnstone, MD Sees Patients

  1. 1 Winthrop University Hospital
    259 1st St, Mineola, NY 11501
    Icon Directions Right Arrow Directions Phone Icon (516) 663-0333

What Patients Say

Likelihood to recommend Dr. Johnstone
5.0
Based on 1 Reviews
5 Stars (1)
4 Stars (0)
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2 Stars (0)
1 Star (0)

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Patient Reviews
Apr 24, 2025
I just had an emergency room visit with Dr. Johnstone and she was phenomenal. Even though she was inundated with patients (even one in cardiac arrest in critical care) she was still attentive, caring, accommodating and just overal an absolute pleasure. She paid attention to even the smallest details like accommodating the friend who brought me and also being mindful to take me to a private room when discussing my situation instead of doing so in the hallway with people all around. She was competent, kind and quick. I wish she was in private practice. She'd be my primary for certain.
— Apr 24, 2025
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Meet Dr. Mary Johnstone, MD

Specialties*
Emergency 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.
Common Questions and Answers
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FAQs About Dr. Johnstone's Practice

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. Mary Johnstone, MD. To arrange an appointment, call the number on Dr. Johnstone's profile.

Dr. Mary Johnstone, MD is affiliated with NYU Langone Hospitals.

Yes, Dr. Mary Johnstone, MD holds board certification in Emergency Medicine.
Training & Medical Education
Medical Education
  • University of Missouri
    2008
Medical Education
Board Certifications
  • Emergency Medicine
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.

Hospitals Where Dr. Mary Johnstone, MD Practices

  • NYU Langone Hospitals

    550 1st Ave, New York, NY

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