Dr. Leslie DeGasparis, ND

Endocrinology, Diabetes & Metabolism  |  
Female  |  
Age 45
Dr. Leslie DeGasparis, ND
Patients often come to Dr. Leslie after seeing several doctors for hormone, thyroid and nutrition issues and have still not found any resolution to their health concerns. Dr. Leslie is known for being a great listener, a tenacious researcher and analyst, a true advocate for her patients and for giving them the tools needed so they can be in the driver's seat when it comes to accomplishing their health goals. She helps patients with thyroid and related hormonal imbalances that can occur for many reasons. She takes into account adrenal and reproductive hormones, as well as the thyroid hormone balance for optimizing her patient's health. She works with both men and women, and also often helps significantly with infertility issues, pregnancy and postpartum issues, as well as menopausal hormone imbalances. She is also an expert in identifying if undiagnosed hypothyroidism is a primary cause of infertility issues for her patients, as it often is, and is often missed by fertility specialists. She can work closely with a patient's primary doctor including a patient's Ob-Gyn to help consult and combine efforts to create the best solution for long-term health.

Seattle Advanced Thyroid Health

155 NE 100th St Ste 402

Seattle, WA 98125

Contact Information

(206) 925-3525

Dr. Leslie DeGasparis, ND

Dr. Leslie DeGasparis, ND

Learn about Dr. DeGasparis

Care Philosophy

"My philosophy is that standard testing does not show the whole, definitive picture – I take the time to get to know your health goals and concerns, do thorough and detailed testing and then together create a plan that gets you results. It has been very rewarding over the years to collaborate with all my patients to help find the answers they have been seeking. I am highly dedicated to personalized and comprehensive care and the outcomes that can significantly improve your life. I like having a partnership with my patients - I have the medical knowledge and you have your own personal knowledge – so combined we are able to get to the root of any health issues you are experiencing." 
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  • Endocrinology, Diabetes & Metabolism

Board Certifications

Dr. DeGasparis does not have any board certifications listed.


Conditions Treated

  • Autoimmune Diseases
  • Depression
  • Diabetes Type 2
  • Epstein Barr Virus-Related Fibromyalgia
  • Fatigue
  • Fibromyalgia
  • Hashimoto's Disease
  • Headache
  • Hormone Imbalance
  • Hyperlipidemia
  • Hyperthyroidism
  • Hypothyroidism
  • Insomnia
  • Migraine, Hormone-Induced
  • Postpartum Depression
  • Rheumatoid Arthritis-Related Fibromyalgia
  • Sleep Disturbance-Related Fibromyalgia
  • Thyroid Disease
  • Thyroiditis
  • Weight Gain
  • Weight Loss


  • Adrenal Fatigue Correction 
  • Allergy Testing
  • Bioidentical Hormone Replacement Therapy
  • Detoxification
  • Diet Counseling
  • Dynamic Endocrine Function Test
  • Food Sensitivity Testing
  • Hormone Replacement Therapy
  • Hormone Therapy, Men
  • Nutritional Counseling
  • Thyroid Hormone Balancing
  • Thyroid Nodule Evaluation
  • Wellness Examination

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Washington.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University Of Washington
    Undergraduate School | Graduated 1997
  • Bastyr University
    Medical School | Graduated 2003
  • Natural Healthcare Nw
    Internship Hospital | Completed 2004
  • Seattle Natural Family Medicine
    Residency Hospital | Completed 2005

Awards & Recognition

Awards & Honors

Dr. DeGasparis has no awards or honors listed.

Media & Publications

Dr. DeGasparis has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. DeGasparis does not have any memberships or affiliations listed. If you are Dr. DeGasparis and would like to add memberships or affiliations, please update your profile.

Dr. DeGasparis' Reviews

Likelihood of recommending Dr. DeGasparis to family and friends
based on 7 total reviews (3 with comments)
Dr. DeGasparis' Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    Under 10 minutes
Patient Comments (3)
in Seattle, WA |
When I first came to Dr. DeGasparis I had spent several years bouncing from one doctor to the next with no resolution for my thyroid issues. I would spend my weekends sleeping and depressed. I suffered brain fog along with hair loss, premature aging, and weight gain. After seeing Dr. GeGasparis for only a month, I immediately felt relief from my symptoms. After about 6 months of treatment, I felt as though I had come back to life.
in Seattle, WA |
I couldn't thank my friend enough for referring me here. Dr. Leslie listens and cares for you like a friend rather than treat you like a case file to get through for the day. I been through my primary and also 3 specialists telling me that my thyroid is "normal" with no explanation or effort to help me with my weird weight gain. Dr. Leslie knew right away what was wrong and I lost 32 pounds this year. My hair has grown back thicker and I'm having the energy I once had to spend with my kids!
in Tulalip, WA |
She is knowledgeable, smart, patient and kind! What a perfect combination for a doctor.
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Hospitals where Dr. DeGasparis has admitting privileges

Kittitas Valley Healthcare
603 S Chestnut St
Ellensburg, WA 98926
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Multicare Auburn Medical Center
202 N Division St
Auburn, WA 98001
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Northwest Hospital and Medical Center
1550 N 115th St
Seattle, WA 98133
View Hospital Profile
Overlake Medical Center
1035 116th Ave NE
Bellevue, WA 98004
View Hospital Profile
Swedish Medical Center - Ballard Campus
5300 Tallman Ave NW
Seattle, WA 98107
View Hospital Profile
Swedish Medical Center - Cherry Hill Campus
500 17th Ave
Seattle, WA 98122
View Hospital Profile
Swedish Medical Center - First Hill Campus
747 Broadway
Seattle, WA 98122
View Hospital Profile
Swedish Medical Center - Issaquah Campus
751 NE Blakely Dr
Issaquah, WA 98029
View Hospital Profile
University of Washington Medical Center
1959 Northeast Pacific Street
Seattle, WA 98195
View Hospital Profile
Valley Medical Center
400 S 43rd St
Renton, WA 98055
View Hospital Profile
Virginia Mason Medical Center
925 Seneca Street
Seattle, WA 98101
View Hospital Profile

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Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism
Endocrinology, Diabetes & Metabolism