Longevity Medical Clinic, Kirkland
Longevity Medical Clinic has practised hormone and preventive medicine around Seattle since 1998, and this is its Kirkland clinic. Membership pairs a named panel of testosterone, DHEA-S, IGF-1, thyroid, homocysteine, CRP, APoE and myDNAge biological age with quarterly one-hour physician visits. The higher tier adds the Galleri multi-cancer blood test.
The care team
Every clinician the operator publishes by name, with their role exactly as the operator states it.

Dr. Jerry Mixon
MD, board-certified in Family Practice and licensed in Washington State
Published qualificationsThe clinic publishes that he holds a B.S. in Microbiology and an M.D. from the University of Utah, and that he spent 23 years in general practice before establishing the clinic in 1998.

Dr. Samira Ummat
Fellow of the American Academy of Anti-Aging Medicine and of the Royal College of Physicians and Surgeons of Canada, holding Washington State and British Columbia licences

Christine Brassell, ND
Licensed Naturopathic Doctor, graduated from the Southwest College of Naturopathic Medicine in 2008

Ken Pentland, ND
Licensed Naturopathic Doctor in Washington State

Irina Riabikina, ND
Licensed Naturopathic Doctor in Washington State and Arizona

Nathanael Armstrong, ND
Licensed Naturopathic Physician in Washington State

Jake Felice, ND
Licensed Naturopathic Doctor in Washington and California, and a Licensed Massage Practitioner in Washington

Dr. Kisoon Cho
Board-certified in Family Practice since 1988

Laura Jimenez, ND
Licensed Naturopathic Doctor in Washington State

Dr. James Nelson

Sharon Mueller, PA-C
Certified as a PA-C in August 1995

Safia Johnson, ND
Licensed Naturopathic Doctor in Washington State, previously licensed in British Columbia
Care at Longevity Medical Clinic, Kirkland
What people come here for, the kinds of care Longevity Medical Clinic, Kirkland offers, and its specific tests and services.
What people come here for
Kinds of care
Tests and services
- Biological age testing
- Estimates aging pace from epigenetic markers.
- Food allergy (IgE) testing
- IgE blood or skin testing for true food allergy, distinct from IgG sensitivity panels.
- GLP-1 weight loss program
- Physician-supervised semaglutide/tirzepatide with monitoring.
- Genetic & genomic testing
- Reads DNA for inherited risk and drug response.
- IV vitamin therapy
- Vitamin and fluid infusions marketed for energy and recovery.
- Menopause hormone therapy
- Estrogen/progesterone care for perimenopause and menopause.
- Micronutrient testing
- Measures vitamin and mineral levels, some inside the cell rather than in serum.
- Multi-cancer early detection blood test
- Screens one blood draw for signals of 50+ cancers.
- Supplement programs
- Clinic-formulated or dispensed supplement protocols.
More care this clinic lists, in its own words.
Practical information
Confirm anything time-sensitive directly with the clinic before your visit.
Similar clinics nearby
Selected based on location and overlapping tests and services.

Pinnacle Integrative Health
Olive Way, Downtown Seattle
Led by Daniel Rasmussen, LAc, DOM - Founder & Clinical Director
- Biological age tests
- Genetic Testing
Next Health, Bellevue
Bellevue
- 3x4 Genetic Test
- Galleri multi-cancer early detection test

Flow Wellness, Seattle
Seattle South Lake Union
Led by Kevin Jones, MD, Founder and medical director
- GLP-1 weight loss and microdosing
- Hormone replacement therapy for women
About this profile and its sources
5 sources
Everything on this page is what the clinic publishes about itself, gathered from the pages linked below and put in one place, in plain English. Where a fact comes from somewhere else, it is named beside that fact.