About Me
As an emergency medicine physician at NYU Langone, I’m committed to providing care that prioritizes wellness and empathy. I’m drawn to the dynamic pace, the diversity of patient cases, and the chance to connect with individuals from all backgrounds. It’s greatly fulfilling to advocate for those who may have been overlooked elsewhere, and this has become my mission.
My training allows me to provide emergency care to all age groups, making me a versatile physician ready to handle any situation that comes through the door. I serve as the medical director for patient experience in our emergency department and actively participate in community outreach. This involves educating and training community members to become responders in emergency situations.
Throughout my career, I’ve been dedicated to proactive engagement in healthcare. I’ve been fortunate to have mentors who showed me how even small acts of kindness can have a significant impact. During the COVID-19 pandemic, my colleagues and I faced challenging circumstances daily, reinforcing my pride in our work.
My path into medicine was sparked by a fascination with its unique combination of science and humanities. The intensity of the emergency department captivated me during my rotation in medical school, inspiring me to pursue a career in this field. As part of NYU Langone, I work closely with other healthcare professionals to ensure comprehensive and coordinated care for my patients. I genuinely care about my patients and strive to provide them with the highest standard of medical care, coupled with empathy and compassion.
Credentials
Positions
- Clinical Assistant Professor, Department of Emergency Medicine at NYU Grossman Long Island School of Medicine
- Co- Medical Director, Comprehensive Transfer Center, NYU Langone Hospital - Long Island
- Administrative Medical Director, Patient Experience, NYU Langone Hospital - Long Island Emergency Department
Board Certifications
- American Board of Emergency Medicine - Emergency Medicine, 2013
Education and Training
- Residency, The Brooklyn Hospital, Emergency Medicine, 2012
- MD from St. George's University, 2008
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Edit profileInsurance Plans Accepted
This provider accepts the following insurance plans.
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Aetna
- Aetna HMO
- Aetna Indemnity
- Aetna Medicare
- Aetna POS
- Aetna PPO/EPO
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Agewell
- Agewell
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Amidacare
- Amidacare
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Blue Cross Blue Shield
- Empire BCBS
- Empire BCBS Top Tier
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Centerlight
- Centerlight
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Centers Plan For Healthy Living
- Centers Plan for Healthy Living
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Cigna
- Cigna EPO/POS
- Cigna PPO
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ElderPlan
- ElderPlan
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Emblem
- Emblem Select Care Exchange
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Empire Blue Cross Blue Shield
- Empire Blue Cross Blue Shield EPO
- Empire Blue Cross Blue Shield HMO
- Empire Blue Cross Blue Shield HealthPlus
- Empire Blue Cross Blue Shield Indemnity
- Empire Blue Cross Blue Shield MediBlue
- Empire Blue Cross Blue Shield POS
- Empire Blue Cross Blue Shield PPO
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Fidelis
- Fidelis Child Health
- Fidelis Exchange
- Fidelis Medicaid
- Fidelis Medicare
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GHI
- GHI CBP
- GHI HMO
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HIP
- HIP Access I
- HIP Access II
- HIP Child Health
- HIP EPO/PPO
- HIP HMO
- HIP Medicaid
- HIP Medicare
- HIP POS
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Hamaspik Choice
- Hamaspik Choice Medicare DSNP
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Healthfirst
- Healthfirst
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Hotel Trades
- Hotel Trades
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Humana
- Humana Medicare
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Local 1199
- Local 1199 PPO
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Longevity Health Plan
- Longevity Health Plan Medicare
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MagnaCare
- MagnaCare PPO
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Medicaid
- NY Medicaid
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Medicare
- Medicare
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MetroPlus
- MetroPlus Child Health
- MetroPlus Exchange Plans
- MetroPlus Medicaid
- MetroPlus Medicare
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MultiPlan/PHCS
- MultiPlan/PHCS PPO
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NYS Health Insurance Plan
- The Empire Plan
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Oscar
- Oscar
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Oxford
- Oxford Freedom
- Oxford Liberty
- Oxford Medicare
- Oxford Metro
- Oxford Mosaic
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PHP
- PHP
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Railroad Medicare
- Railroad Medicare
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Senior Whole Health
- Senior Whole Health
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Tricare
- Tricare
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UHC
- UnitedHealthcare EPO
- UnitedHealthcare HMO
- UnitedHealthcare Medicare
- UnitedHealthcare POS
- UnitedHealthcare PPO
- UnitedHealthcare Top Tier
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US
- US Department of Labor
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United Healthcare
- UHC Medicare Complete Choice Regional PPO
- United Healthcare Compass Exchange /CareCore / Charter
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VNS
- Visiting Nurse Service (VNS) Medicare
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Village Caremax
- Village Caremax
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WTC Health Program
- WTC Health Program
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WellCare
- WellCare Medicare
Mary Jo Johnstone, MD does not accept insurance.
Locations and Appointments
NYU Emergency Medicine
259 1st Street, Mineola, NY 11501
Research Academic Contact
Academic office
259 1st Street
1st floor Emergency Department
Mineola, NY 11501
Phone
Publications
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Johnstone, Mary
Beginnings (American Holistic Nurses Association). 2009 Nov ; 29(3):14-5