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Physician Assistants (PAs)

Physician Assistants (PAs) are important members of the health care team at Northwest Diagnostic Clinic. Our PAs work under clinical protocols developed with the physicians for the purpose of caring for the practice’s patients. The PAs may provide both urgent and routine care depending on the situation. They work closely with the physicians to ensure that patients receive the best and timeliest care possible. For more information about Physician Assistants, visit the American Academy of Physician Assistants.

Caroline Camarata picture

Caroline Camarata, PA-C
• Bachelor of Science - Biology, Texas A & M University, College Station, Texas
• Physician Assistant, UT Medical Branch at Galveston, Galveston, Texas
• In practice since 1996

Annalysa Nguyen picture

Annalysa Nguyen, PA-C, CDE
• Bachelor of Science - Biology, St. Joseph's University Philadelphia, PA
• Physician Assistant, Philadelphia College of Osteopathic Medicine, Philadelphia, PA
• Certified Diabetic Educator (CDE), 2009
• In practice since 2003

Rachel Koster, PA-C
• Bachelor of Arts (Philosophy), Idaho State University, Pocatello, ID
• Masters in Physician Assistant Studies, Idaho State University, Pocatello, ID
• In practice since 2010
Barbara Slusher, PA-C, MSW
• Bachelor of Arts - Social Work, University of Maryland - Baltimore, MD
• Masters in Social Work, University of Maryland - Baltimore, MD
• Physician Assistant, University of North Texas, Fort Worth, TX
• In practice since 2000


Ashley Barnes, PA-C

• Bachelor of Arts - Spanish - Texas Tech University, Lubbock, TX
• Masters in Physician Assistant Studies - The University of Texas Health Science Center, San Antonio, TX
• In practice since 2012