Bell icon Mount Sinai remains open during COVID-19: Read our response.
Advisors Available 24/7  |  (323) 469-6000  |  CONTACT


Arielle Davis

June 5, 1996 - December 18, 2019

Service Information

Mount Sinai Simi Valley - Kamenir Chapel

6150 Mount Sinai Drive

Simi Valley, CA 93063

Service Date
Sunday December 22nd, 2019
Service Time
10:00 am
Obituary Viewed 8788 times

Service Date: Sunday December 22nd, 2019

Service Time: 10:00 am

Mount Sinai Simi Valley - Kamenir Chapel

6150 Mount Sinai Drive

Simi Valley, CA 93063

Subscribe to updates for Arielle Davis

Please choose your subscription settings below, you can unsubscribe through email at any time.

Email me when someone posts in the guestbook

Email me when an update is made to the obituary

Email me on the anniversary of passing


Arielle Sheri Davis

June 5, 1996 – December 18, 2019

Arielle Sheri Davis, beloved daughter, sister, granddaughter, niece, cousin, colleague, student, tutor, patient advocate, and friend, passed away during the early hours of Wednesday, December 18, 2019, after a multi-year, courageously fought battle against an interconnected set of rare, debilitating autoimmune diseases: MCAS (Mast Cell Activation Syndrome), Autoimmune Angioedema, POTS (Postural Orthostatic Tachycardia Syndrome), Sjogren’s Syndrome, immune deficiency, osteoporosis, and EDS (Ehlers Danlos Syndrome).  She is survived by her father Gregg Davis, her stepmother Beth Davis, her brother Cody Davis, and her mother Rachel Davis.

Arielle was born in Castro Valley, California, on June 5, 1996.  She grew up in Fremont, and then later in Mountain View, California. At the age of 11, she received her Black Belt in WCWMA Karate, and her brother Cody Davis was born. Arielle was an avid, hard-working, brilliant, and successful student, and also contributed to her community in many ways, including working as a volunteer and later interning at the Ronald McDonald House in Stanford, California. Arielle was the Yearbook Editor and Mural Club President at Kehillah Jewish High School, in Palo Alto, California, from which she graduated in 2014 with a 4.13 GPA! Arielle then went on to attend Pitzer College in Claremont, California, from which she graduated in 2018 with a BA in Psychology and a minor in Sociology.  Arielle was an extremely gifted writer, public speaker, and communicator, and was also proficient in Spanish, Hebrew, and American Sign Language. In addition to her academic excellence, Arielle was deeply involved in extracurricular and service activities at Pitzer, where she was a member of Psi Chi, Pitzer Psychological Student Association, Spoonie Alliance, Judicial Council, Illness and Difference Alliance, and the West Hall Council.  Arielle also worked as an Online Tutor at Chegg Inc., from 2016 up until just a few weeks before her passing and was much in demand for her expertise, compassion, and great ability to explain, educate, and inspire.

After Pitzer, Arielle worked as a Family Resource Coach at Children’s Hospital Los Angeles (CHLA) and in 2019 began the UCLA Extension Online Patient Advocacy Certificate Program.  Arielle excelled in her academic and professional pursuits while facing tremendous personal challenges in dealing with her various autoimmune disorders, in particular MCAS (Mast Cell Activation Syndrome), which was first identified in 2007, is exceptionally rare, difficult to diagnose and treat, poorly understood, and sadly, as of yet, incurable. Arielle was an exceptionally articulate, knowledgeable, hard-working, and compassionate patient advocate, educator, and support to her clients, and to so many other patients around the world struggling with MCAS/POTS/EDS, both in person, online, and through her blog: “ABCD MCAS what? Arielle’s Journey with MCAS, POTS and EDS” (



Arielle was a lovely, upbeat, and caring young woman, on her way to a career helping other people struggling with disease. She was a strong, caring, and compassionate warrior for patients and for the causes she supported. With your gift, you can help Arielle continue her work, in memory of our beloved Arielle and so many others suffering from MCAS. You can give directly to a memorial fund we have setup for Arielle Davis at:




Attending a Service

If you will be attending a funeral service at Mount Sinai and are not familiar with our Jewish funeral traditions and customs, we encourage you to visit our FAQ page.

Our cemeteries are open Sunday through Friday 8:00 AM – 5:00 PM

View Holiday Schedule »

Our Locations

Hollywood Hills

Mount Sinai Hollywood Hills

5950 Forest Lawn Drive, Los Angeles, CA 90068

Get Directions

Simi Valley

Mount Sinai Simi Valley

6150 Mount Sinai Drive, Simi Valley, CA 93063

Get Directions

Park Hours

Our cemeteries are open Sunday through Friday
8:00 AM – 5:00 PM

View Holiday Hours

Light a Virtual Candle

Light a Virtual Candle for a loved one, leave your name and choose an image.

Choose a candle or special image.