About Dr. Pegah Mashayekhi

Dr. Pegah Mashayekhi, also known as Dr. Mashay, is a board certified physician specializing in Sleep Medicine and Obesity Medicine. With a history of providing exceptional care at Palomar Health Medical Group since 2016, Dr. Mashayekhi embarks on this new venture, bringing her expertise and patient base to a practice solely hers.

She earned her medical degree from Midwestern University, Arizona College of Osteopathic Medicine, and completed her internship and residency at the University of California, San Francisco in Fresno. Following her residency, she pursued a Sleep Medicine Fellowship at Baylor College of Medicine. Throughout her medical education, she has been involved in delivering and advocating for healthcare globally, with experiences in countries such as Colombia and Central America.

Beyond her medical practice, Dr. Mashayekhi is committed to lifelong learning and guiding patients toward healthier lifestyles. Her interests include education and health advocacy, in addition to sleep disorders, obesity and their associations with chronic diseases.

Outside of medicine, Dr. Mashayekhi enjoys various hobbies such as traveling abroad, cooking, and Persian dancing. She is proficient in Spanish and Persian (Farsi).

Her guiding philosophy echoes William Londen’s words: “Good health; eat lightly, breathe deeply, live moderately, cultivate cheerfulness, and maintain an interest in life.”

About Dr. Pegah Mashayekhi

Dr. Pegah Mashayekhi, also known as Dr. Mashay, is a board certified physician specializing in Sleep Medicine and Obesity Medicine. With a history of providing exceptional care at Palomar Health Medical Group since 2016, Dr. Mashayekhi embarks on this new venture, bringing her expertise and patient base to a practice solely hers.

She earned her medical degree from Midwestern University, Arizona College of Osteopathic Medicine, and completed her internship and residency at the University of California, San Francisco in Fresno. Following her residency, she pursued a Sleep Medicine Fellowship at Baylor College of Medicine. Throughout her medical education, she has been involved in delivering and advocating for healthcare globally, with experiences in countries such as Colombia and Central America.

Beyond her medical practice, Dr. Mashayekhi is committed to lifelong learning and guiding patients toward healthier lifestyles. Her interests include education and health advocacy, in addition to sleep disorders, obesity and their associations with chronic diseases.

Outside of medicine, Dr. Mashayekhi enjoys various hobbies such as traveling abroad, cooking, and Persian dancing. She is proficient in Spanish and Persian (Farsi).

Her guiding philosophy echoes William Londen’s words: “Good health; eat lightly, breathe deeply, live moderately, cultivate cheerfulness, and maintain an interest in life.”

About Donna Seo, PA-C

Donna Seo is a board-certified Physician Assistant specializing in sleep medicine and obesity medicine. A proud San Diego native, she is passionate about helping patients improve their sleep, manage their weight, and develop realistic, sustainable habits that support long-term health and well-being.

Donna earned her undergraduate degree from California Polytechnic State University, San Luis Obispo, before completing her Master of Science in Physician Assistant Studies at Randolph-Macon College in Virginia. She is certified by the National Commission on Certification of Physician Assistants (NCCPA) and is an active member of the American Academy of Physician Associates (AAPA), the California Academy of Physician Associates (CAPA), and the San Diego Society of Physician Assistants (SDSPA).

Prior to joining the practice, Donna built a diverse clinical foundation working in ENT, dermatology, plastic surgery, and orthopedics. Her experience across various specialties has shaped her thoughtful, whole-person approach to patient care.

Outside of medicine, Donna enjoys traveling, trying new coffee shops and restaurants around San Diego, trying new recipes, spending time at the beach, and cheering on the Padres.

About Donna Seo, PA-C

Donna Seo is a board-certified Physician Assistant specializing in sleep medicine and obesity medicine. A proud San Diego native, she is passionate about helping patients improve their sleep, manage their weight, and develop realistic, sustainable habits that support long-term health and well-being.

Donna earned her undergraduate degree from California Polytechnic State University, San Luis Obispo, before completing her Master of Science in Physician Assistant Studies at Randolph-Macon College in Virginia. She is certified by the National Commission on Certification of Physician Assistants (NCCPA) and is an active member of the American Academy of Physician Associates (AAPA), the California Academy of Physician Associates (CAPA), and the San Diego Society of Physician Assistants (SDSPA).

Prior to joining the practice, Donna built a diverse clinical foundation working in ENT, dermatology, plastic surgery, and orthopedics. Her experience across various specialties has shaped her thoughtful, whole-person approach to patient care.

Outside of medicine, Donna enjoys traveling, trying new coffee shops and restaurants around San Diego, trying new recipes, spending time at the beach, and cheering on the Padres.

About Elizabeth Wilson, FNP-C

Elizabeth Wilson, FNP-C, is a nurse practitioner dedicated to providing compassionate, patient-centered care with a focus on helping patients improve their overall health and well-being through education, prevention, and evidence-based treatment.

She earned her nursing degree from University of Arkansas and completed her family nurse practitioner training at University of Alabama at Birmingham. During nurse practitioner school, she spent three years travel nursing in both NICU and adult medical-surgical settings, gaining experience caring for diverse patient populations across a variety of healthcare environments. Prior to joining the practice, she also spent a year working in family medicine, further strengthening her background in comprehensive patient care.

Throughout her career, she has remained passionate about service and global health initiatives, participating in medical mission trips to Honduras. Her clinical interests include sleep disorders, obesity medicine, preventive health, and helping patients develop sustainable lifestyle habits to support long-term wellness.

Outside of clinical practice, Elizabeth enjoys weightlifting, pickleball, traveling, cooking, trying new restaurants, hiking, and spending time with family and friends.

About Elizabeth Wilson, FNP-C

Elizabeth Wilson, FNP-C, is a nurse practitioner dedicated to providing compassionate, patient-centered care with a focus on helping patients improve their overall health and well-being through education, prevention, and evidence-based treatment.

She earned her nursing degree from University of Arkansas and completed her family nurse practitioner training at University of Alabama at Birmingham. During nurse practitioner school, she spent three years travel nursing in both NICU and adult medical-surgical settings, gaining experience caring for diverse patient populations across a variety of healthcare environments. Prior to joining the practice, she also spent a year working in family medicine, further strengthening her background in comprehensive patient care.

Throughout her career, she has remained passionate about service and global health initiatives, participating in medical mission trips to Honduras. Her clinical interests include sleep disorders, obesity medicine, preventive health, and helping patients develop sustainable lifestyle habits to support long-term wellness.

Outside of clinical practice, Elizabeth enjoys weightlifting, pickleball, traveling, cooking, trying new restaurants, hiking, and spending time with family and friends.