Each employee of HealthFirst Medical Group is dedicated to exceeding our patient’s expectations by providing timely, compassionate, and individualized customer service and medical care. We are committed to treating each patient with respect and dignity…

Ronald Crowell, M.D.

  • Medical Director/Owner
  • Board Certified Emergency Medicine
  • Industrial Medicine Experience, since 1980
  • Mini-Residency in Occupational Medicine
  • Past Director of Downey Community Hospital Emergency Department
  • Certified Medical Review Officer

Gregory Ogata, M.D.

  • Full-Time Physician, since 1995
  • Board Eligible in Emergency Medicine
  • Emergency/Industrial Medicine Experience, since 1988
  • Certified Medical Review Officer

Michael Hadley, M.D.

  • Full-Time Physician, since 2010
  • Industrial Medicine Experience, since 1986
  • Workers Compensation Systems Specialist
  • Experienced Case Manager
  • Certified Medical Review Officer

Physician Assistants:
Karen Delahoussaye, PA-C

  • HealthFirst Physician Assistant, since 2013

Marie Caserio, PA-C

  • HealthFirst Physician Assistant, since 2006

John Onofre, PA-C

  • HealthFirst Physician Assistant, since 2015

Jesse Zepeda, PA-C

  • HealthFirst Physician Assistant, since 2015

Physical Therapist:
Fred Crum, RPT

  • Registered Physical Therapist
  • HealthFirst Physical Therapist, since 1992

Orthopedic Specialists:
Richard Zapanta, M.D.

  • Board Certified in Orthopedic Surgery

Ramy Elias, M.D.

  • Board Certified in Orthopedic Surgery

Matthew Longacre, M.D.

  •  Orthopedic Surgery

Arash Yaghoobian, M.D.

  • Orthopedic Surgery – Spine Specialist

Paul Casey, M.D.

  • Orthopedic Surgery – Hand Specialist

Pain Management Specialist:
Raafat Mattar, M.D.

  • Board Certified in Anesthesiology

Ronald Bishop, M.D.

  • Pain Management Specialist

Acupuncture:
Kathy McGowan, L.AC, DPL AC

  • Acupuncture