Due to Winter Storm Toby, Stamford Health Medical Group offices and the Walk-In Center will close at noon on Wednesday, March 21. The Immediate Care Center at Tully Health Center is open during normal business hours. The following imaging centers will also be closed: Chelsea, Wilton, Long Ridge, Greenwich, Summer Street and Darien. All of Stamford Hospital will be open and staffed appropriately. As always, in the event of an emergency, please visit the Emergency Department. Thank you for your cooperation as we keep the safety of our patients top of mind.

Heather Machen

Heather Machen, MD

Director, Pediatric Emergency Medicine


Pediatric Emergency Medicine

Medical School

St. George's University


Inova Fairfax Children's Hospital


Schneider Children's Hospital

Board Certifications

  • Pediatric Emergency Medicine - American Board of Pediatrics


  • US Acute Care Solutions

    One Hospital Plaza Emergency Department Stamford, CT 06902

    Main: 203-276-7777
    Fax: 203-276-7097

More about Heather Machen, MD


Originally from Greenwich, Dr. Machen returned there with her two children to join Stamford Health as the new Director of Pediatric Emergency Medicine.

She spent the last nine years as a pediatric emergency medicine physician at Texas Children’s.

Dr. Machen has a special interest in global health and travels internationally providing clinical care and lecturing on pediatric emergency medicine.

Published Work

*Outcomes of Patients with Respiratory Distress Treated with
Bubble CPAP on a Pediatric Ward in Malawi. ” Machen, H. E.,
Mwanza, Z. V., Brown, J. K., Kawaza, K. M., Newberry, L., Richards-
Kortum, R. R., Oden, Z. M., Molyneux, E. M.; J. Trop. Pediatr. 2015
Sep 13.

*A high-value, low-cost bubble continuous positive airway
pressure system for low-resource settings: technical assessment
and initial case reports.” Brown, J., Machen, H., Kawaza, K.,
Mwanza, Z., Iniguez, S., Lang, H., Gest, A., Kennedy, N., Miros, R.,
Richards-Kortum, R., Molyneux, E., Oden, M.; PLoS ONE. 2013.

*What’s new in global pediatric emergency medicine?” Machen, H.E.; Curr Opin Pediatr. 2010 Jun.


  • American Academy of Pediatrics (AAP)
  • American College of Emergency
    Physicians (ACEP)
  • African Federation of Emergency
    Medicine (AFEM)
  • American Academy of Emergency
    Medicine in India (AAEMI)


English, Fluent French, and Medical Spanish

If you are in need of emergency care, call 911.

The majority of the physicians on the Stamford Hospital Medical Staff are not employees or agents of the Hospital. They are independent practitioners who have been granted the privilege of using the Hospital's facilities for the care and treatment of their patients. This includes, but is not limited to, emergency department physicians, anesthesiologists, radiologists, surgeons, cardiologists, obstetricians, pathologists and other consultants who may treat patients.

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