Explore the Hospital Medicine Unit


Massachusetts General Hospital’s Hospital Medicine Unit is comprised of more than 70 outstanding board-certified internal medicine physicians. The Hospital Medicine Unit is committed to providing high-quality medical care and education. This is supported by a team of remarkable nurse practitioners and physician assistants and an exceptional administrative staff that helps us meet that commitment.

Our physicians serve over 150 patients in a variety of inpatient care settings, including high acuity, regionalized direct patient care; moderate acuity, non-regionalized direct patient care; and residency teaching teams.

The Hospital Medicine Unit’s focus is on delivering outstanding patient care, while fostering academic advancement and professional growth for its providers.

What is Hospital Medicine?

According to the Society of Hospital Medicine, Hospital Medicine is a medical specialty dedicated to the delivery of comprehensive medical care to hospitalized patients. Practitioners of hospital medicine include physicians (“hospitalists”) and advanced practice clinicians who engage in clinical care, teaching, research, or leadership in the field of general hospital medicine.

Leadership Team

  • Melissa Mattison, MD: Chief, Hospital Medicine Unit
  • Warren Chuang, MD: Director, Clinical Staffing
  • David Lucier, MD: Director, Quality and Patient Safety
  • Denisa Gace – Associate Director of Operations
  • Cindy Yu – Associate Director of Operations
  • Emily Hughes – Associate Director of Operations
  • Steven Knuesel – Lead for ED Boarder
  • Patrick Smithedajkul – Lead for Simulation
  • Meghan Meehan – Lead Nurse Practitioner
  • Noam Shabani – Lead Physician Assistant
  • Margaret Chapman –Lead for Education


Find a Hospital Medicine Doctor

Nurse Practitioners

  • Meghan Meehan, NP
    • Lead NP
  • Tiffany Clapp, NP
  • Erin Dodds, NP
  • Grace Deveney-Smith, NP
  • Alexandra Ebzery, NP
  • Lauren Gagarin, NP
  • Kate Hoffman, NP
  • Patricia Iott, NP
  • Nancy Kelly, NP
  • Jennifer Orcutt, NP
  • Laura Sherburne, NP
  • Katharine Turck, NP
  • Laura Walsh, NP


  • Melissa Bunting, RN
  • Candice Couture, RN
  • Holly Jackson, RN
  • Venice Scott, RN

Physician Assistants

  • Noam Shabani, PA
    • Lead PA
  • Megan Pearly, PA
  • Meghan Chalifour, PA
  • Trang Chalupka, PA
  • Casey Cowan, PA
  • Rachel Dinisman, PA
  • Timothy Goulet, PA
  • Mariah Hamilton, PA
  • Brittani Loukas, PA
  • Kathleen McElhiney, PA
  • Nicholas Palen, PA
  • Joseph Parseghian, PA
  • Lauren Prince, PA
  • Emily Rettstatt, PA
  • Victoria Sinyak, PA
  • Giselle Tungol, PA
  • Lauren Van Aken, PA