Elias Kass, ND

Naturopathic doctor, dad, former midwife, always an engineer. 

Dr. Elias Kass graduated from Bastyr University in 2010 as a Doctor in Naturopathic Medicine and received his Certificate in Naturopathic Midwifery at the same time. He also holds a Bachelors in Science in Engineering (Computer Science Engineering) and a BA in English and Creative Writing (Highest Honors) from the University of Michigan. A pediatrics practice requires creativity, ingenuity, playfulness, and a love of challenges and problem-solving. As a software engineer turned physician-midwife, and with extensive training and experience in a variety of settings, Dr. Kass is uniquely qualified to provide comprehensive naturopathic primary care.

In 2014, Dr. Kass retired the midwifery portion of his practice, and in 2017 decided not to renew his midwifery license, thus dropping the LM (licensed midwife) and CPM (certified professional midwife) and significantly shortening the length of his signature!

Dr. Kass currently specializes in the naturopathic primary care of babies and children, including well baby and well child checks, immunizations, oral care (including basic dental exams and topical fluoride varnish), prescribes medication, and facilitates referrals and specialty care. He further specializes in breastfeeding and infant feeding problems, including tongue tie and milk supply challenges. He also helps people induce lactation (bring in milk) even if they have not been pregnant (for example, lesbian couples who both want to breastfeed, or adoptive parents who want to breastfeed).

Dr. Kass has previously been a professional member of the Midwives Association of Washington State, and has served on the Board of Directors as Treasurer. He is currently a member of the Naturopathic Association of Primary Care Physicians, the Washington Chapter of the American Academy of Pediatrics, and writes for NDsForVaccines.com.

In 2017, Dr Kass was the first-ever ND to be recognized as a CDC Childhood Immunization Champion for Washington State.



Thinking Through the Child Vaccine Schedule

Newborn hepatitis B vaccine: Is your baby scandalous?

Preventing pertussis in newborns with Tdap in pregnancy

Mumps: why bother caring?

Titer Andromedon


Childhood Immunizations: Building a Foundation of Immunity. This webinar, targeted towards physicians, including naturopathic physicians, will discuss how to build connections with families and discuss immunizations as part of a healthy childhood.

Transplacental Partnerships: Immunity Building in Pregnancy and Beyond. This webinar, targeted to midwives, physicians, and prenatal healthcare providers, will discuss how to build connections with families and discuss immunizations while they introduce a new child into the world.


Mattie Bly, ND, MPH

Mattie Bly, ND, MPH was born and raised in Bothell, WA. She received her Naturopathic Doctorate and Masters in Public Health from Bastyr University in 2019. Dr. Bly is passionate about evidence-based integrative pediatric medicine and community oriented health care. When not seeing patients, she's conducting research at Seattle Children's Hospital on food insecurity and health outcomes. Prior to attending Bastyr, Dr. Bly graduated from the University of Alaska Fairbanks with a degree in Biological Sciences with concentrated study in microbiology. While completing her undergraduate degree, she spent two years conducting research in wildlife toxicology and infectious disease. 

Dr. Bly has joined the practice as a resident physician as of October 1, 2019.

Dr. Bly is a board member of the Pediatric Association of Naturopathic Physicians, a member of the American Academy of Pediatrics, and the Washington State Public Health Association. In her free time, she enjoys everything outdoors including trail running, skiing, and weekend camping trips. 


Jennifer P.

Jennifer is our primary medical assistant (and effectively our practice manager!). She enjoys her family and her basset hound.


Dr Jean Hung (locum)

We very much appreciate Jean Hung, ND, covering Dr Kass’s paternity leave! She is now practicing at Flourish Natural Medicine in Mill Creek. Thank you for caring for our patients, Dr Hung!