Our Staff

OBGYN Physicians

Our Idaho Falls obstetricians and gynecologists are all board certified obgyn doctors. Each bring their own unique education, training and specialties to Rosemark providing a variety of obgyn healthcare treatment options for our patients.

Dr. Steven Robinson.
Dr. Steven Robison, MD, CPI
  • Board Certified Obgyn Doctor
  • Advanced surgical expertise
  • Extensive Clinical Research
  • Certified Physician Investigator
  • GCP & ICH Training Certificate
  • BLS, NALS, and ACLS Certification
  • Army Veteran
Dr. Matthew Robison, DO
  • Board Certified Obgyn Doctor
  • Advanced surgical expertise
  • Extensive Clinical Research
  • High Risk Pregnancy
  • Proficient in Spanish
Dr. Jason Gundersen
Dr. Jason Gundersen, MD
  • Board Certified Obgyn Doctor
  • Advanced Surgical Expertise (Laparoscopic & Robotic)
  • Minimally Invasive Surgery Specialty
  • Low & High Risk Pregnancy
  • Endometriosis & Uterine Bleeding
  • Painful Period Treatment
Dr. Ty Erickson
Dr. Ty Erickson, MD, FPMRS
  • Board Certified Obgyn Doctor
  • Board Certified Urogynecologist
  • Advanced Surgical Expertise
  • Idaho Board of Medical Examiners
  • GCP & ICH Training Certificate
Dr. Barbara Nelson.
Dr. Barbara Nelson, MD
  • Board Certified Obgyn Doctor
  • Aesthetics Specialty
  • Vice Chairman, EIPHD
  • Extensive Clinical Research
  • Teaching Faculty, BYU-Idaho

Certified Nurse-Midwives

All of our caring and compassionate midwives are certified nurse-midwives who have specialized training in childbirth. They have extensive training in delivery rooms and provide more personal and intimate attention throughout labor and delivery. They also prepare for delivery with education and consultations.

Susan Binegar
Susan Binegar, CNM
Natalie Taylor.
Natalie Taylor, CNM
Heather Duffey, CNM
Maddie Harris, CNM

NPs & PAs

Our physician’s assistants and nurse practitioners are all certified and experienced healthcare providers from credentialed universities. They provide a great service to the Rosemark patients with all manner of obstetric and gynecological matters. They also provide primary care and various other treatments to benefit the health and well-being of our patients.

Melissa Bates, PA-C

Certified Physician’s Assistant

Audra Stevens.
Audra Stevens, PA-C

Certified Physician’s Assistant

Lori Woodbury.
Lori Woodbury, PA-C

Certified Physician’s Assistant

Amber Masse.
Amber Masse, FNP-C

Certified Family Nurse Practitioner

Tauni Eckersell.
Tauni Eckersell, FNP-C

Certified Family Nurse Practitioner


By using sound waves to reflect images through the ultrasound process, our sonographers assist the Rosemark physicians in the diagnosis of disease or the monitoring of existing conditions, like pregnancy.

Our ultrasound technicians have extensive training with advanced ultrasound equipment and have years of experience caring for patients. From the excitement of a baby’s first ultrasound to the trepidation of a patient experiencing pain, our sonographers understand and are sensitive to the needs of each patient as an individual.

Darla Bakker.
Darla Bakker, ARRT, RDMS
Mindy Williams.
Mindy Williams, ARRT, RDMS
Kara Waddoups.
Kara Waddoups – ARRT, ARDMS

Nurses & CMAs

The Rosemark nurses and medical assistants work very closely with our patients and help them along the path with both obstetrics and gynecological care. Our nursing staff consists of dedicated medical professionals who are some of the most caring individuals who feel it a privilege to care for women in each stage of life.


Jay Seedall, Administrator

To maintain a highly functioning practice the size of Rosemark, there are many people performing a variety of functions to provide an optimal experience for our patients.

The administrative staff, lead by Jay Sedall, works behind the scenes to ensure all the processes and paperwork are properly operating. With so many detailed procedures and policies to follow, they work diligently to keep the flow of business optimized, especially when working with insurance companies so that accurate billing is reflected.