Registered Dietitian Nutritionist & Fitness Coach —
Covered by Insurance

Zero out of pocket cost for 95% of our patients!
Start with a Registered Dietitian Nutritionist & Certified Personal Trainer via video call.
FSA/HSA/HRA and self-pay options available.
In-Network with:





Featured In:




Real Reviews, Real Results:
30+
Posted on Google J GTrustindex verifies that the original source of the review is Google. Isaac Diaz is my nutritionist and he does a great job of helping me to understand what foods I need to have to better addres my goals for my health. I'm excited to continue working with him.Posted on Google L STrustindex verifies that the original source of the review is Google. Issac was very knowledgeable and helpful in trying to find the right plan for me to maintain good eating habits and loosing weight. I look forward to working with him in the near future.
Owner's reply
Thank you! I'm glad I could help you find a nutrition plan that fits your lifestyle and supports your goals for healthy eating and sustainable weight loss. Our approach is always personalized, practical, and focused on building long-term habits rather than quick fixes. I look forward to working with you and helping you make lasting progress toward your health and wellness goals. Thank you for trusting Fit4Life Nutrition!Posted on Google J CTrustindex verifies that the original source of the review is Google.
Owner's reply
Thank you for your 5 star review. It was a pleasure getting to know you and your goals.Posted on Google J ATrustindex verifies that the original source of the review is Google. I had an awesome experience working with Isaac. During the session he was attentive, knowledgeable and was genuinely invested in helping me reach my health goals. He took the time to understand my lifestyle and created a plan that felt practical and actually sustainable. He was always willing to answer my questions so there was no confusion. I would highly recommend him to anyone looking for help and support during their health journey.
Owner's reply
Thank you so much for your thoughtful review! We’re grateful for the opportunity to be part of your health journey. Our goal is to provide personalized, evidence-based nutrition counseling that fits each person's unique lifestyle, making healthy habits practical and sustainable for the long term. We’re glad you felt supported and that your questions were always answered clearly throughout the process. Your recommendation means a lot to us, and we look forward to continuing to help individuals reach their health goals through compassionate, personalized telehealth nutrition coaching. Thank you again for trusting Fit4Life Nutrition!Posted on Google S STrustindex verifies that the original source of the review is Google. Isaac has been wonderful to work with. From the beginning it has been an easy process. The ease of the forms he had me fill out to syncing up on video, the process is very simple. We have had numerous calls, and I am so happy with the progress we are making.
Owner's reply
Thank you for sharing your experience! We're thrilled to hear that the entire process—from completing your intake form to meeting through our secure telehealth video appointments—has been simple and convenient. Our goal is to make personalized nutrition counseling as accessible and stress-free as possible while providing the guidance and accountability needed to achieve lasting results. We're so glad you're happy with the progress you've made, and we look forward to continuing to support you on your health journey.Posted on Google A RTrustindex verifies that the original source of the review is Google. Isaac was so detailed within our first meeting. The questions and the way he framed certain things allowed me to see the areas that i needed help in. Would recommend him to everyone.
Owner's reply
Thank you so much for your amazing review! We're honored to hear that your first nutrition consultation was both insightful and helpful. Our goal is to ask thoughtful questions and provide personalized, evidence-based nutrition guidance that helps each client better understand their habits and identify realistic opportunities for lasting change. We're grateful for your recommendation and look forward to continuing to support individuals on their journey toward better health through compassionate, personalized telehealth nutrition counseling. Thank you for choosing Fit4Life Nutrition!Posted on Google S STrustindex verifies that the original source of the review is Google. Issac has been wonderful to work with. From the very beginning, I completed a few forms before our first meeting and this allowed us to jump right in and make the most of our time together. He has been incredibly supportive offering ideas for meal prep and suggesting food swaps to help with my cravings. He is very encouraging and easy to follow. I appreciate his personal approach and so look forward to continuing to work with him!
Owner's reply
Thank you so much for your thoughtful review! We are grateful for the opportunity to support you on your health journey. We're glad the nutrition assessment forms helped us make the most of your first appointment and create a personalized plan from day one. Finding practical meal prep ideas, healthy food swaps, and strategies to manage cravings are all important parts of building sustainable eating habits. Our goal at Fit4Life Nutrition is to provide personalized, evidence-based nutrition counseling that fits your lifestyle and helps you achieve long-term success. We truly appreciate your trust in Fit4Life Nutrition and look forward to continuing to support your health and wellness goals!Posted on Google T MTrustindex verifies that the original source of the review is Google. Great energy and incredibly knowledgeable!
Owner's reply
Thank you! We’re thrilled to hear you had a great experience. At Fit4Life Nutrition, we strive to bring positive energy and evidence-based guidance to every session while providing personalized, practical support to help our clients reach their health goals.Posted on Google M CTrustindex verifies that the original source of the review is Google. SEE ISAAC STAT!!!!!! He has made me truly love myself! It’s okay to love food and be fit!!!!!! He also has the best quotes ask him about them😁😁😁
Owner's reply
Thank you so much for this incredible review! We’re honored to hear that your experience has helped you build confidence, enjoy food without guilt, and embrace a healthy, balanced lifestyle. At Fit4Life Nutrition, we believe it’s absolutely possible to love food and be fit while creating sustainable habits that support long-term wellness. We appreciate your recommendation and look forward to continuing to support your nutrition and fitness journey!Posted on Google G CTrustindex verifies that the original source of the review is Google. Isaac is the absolute best. He has boosted my confidence immensely and it was only a consultation. Looking forward to continuing my relationship with him, food, and fitness.
Owner's reply
Thank you so much for your thoughtful review! We’re honored to hear that your nutrition consultation helped boost your confidence and provided a positive start to your health journey. Our goal is to help clients build a healthy relationship with food, fitness, and sustainable habits that last. We’re excited to continue working together and support you every step of the way.Load moreVerified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
Small Steps, Big Changes—Starting Now

Nutrition For Lasting Change
Learn how to maintain healthy eating-for the long term.

Behavioral Fitness Coaching
Develop fitness strategies that foster lasting habits and long-term success.

Increase Your Energy Levels
Maximize your energy and potential to fuel your day every day.
Nutrition Results
- Personalized Nutrition & Fitness Guidance
- Manage Health Conditions
- Weight Management
- Better Relationship With Food Support
- Built Sustainable Long Term Eating Habits
Wellness Impact
- Increased Quality of Life
- Reduced Stress and Improve Mood
- Increased Motivation To Achieve Goals
- Boosted Confidence and Self Esteem
- Transformed Health Journey
Why Choose Us?
#1: Go beyond nutrition guidance and get exercise support from a Certified Personal Trainer and Certified Health Education Specialist at no additional cost.
#2: We extend our reach past sessions with an evidence-based motivation and goal toolkit—all included at no extra cost to support you between visits.
#3: Get support when you need it most. We offer afternoon, evening and weekend appointments to fit your real-life schedule.

How It Works
Step 1) Start by filling out our clinic form by clicking book appointment.
Step 2) Verify you email address.
Step 3) Once everything looks good, you’ll receive an invitation to schedule your appointment.
Insurance, HSA/FSA/HRA & Self Pay
Insurance: We are in-network nationwide with Anthem, Aetna, United Healthcare, and Blue Shield of California. We are also in-network with the following Blue Cross Blue Shield products nationwide: Premera, Highmark, CareFirst, Regence, Wellmark, Horizon, Excellus, Capital, and Independence. For additional questions, please view our FAQ page.
FSA/HSA/HRA Debit Cards: These can be used to cover the full consultation fee of $150.00 for 55 minutes, co-pays, or co-insurance amounts, as determined by your insurance plan. You may also use this option if your plan is considered out-of-network.
Self Pay: Long-Term Health and Fitness Investment of $150.00 per 55 minute consultation. This is a great option if you do not have insurance, are considered out-of-network, your plan does not include telehealth benefits, your HMO plan is not covered, or if you simply prefer not to use your health insurance plan.
Inside The Expertise

Isaac Diaz, MPH, RDN, LDN, NASM-CPT, CHES
Hi, I'm Isaac, a Licensed Registered Dietitian Nutritionist, Certified Personal Trainer, and Certified Health Education Specialist. With many years of experience, I specialize in guiding clients to achieve their desired health and fitness goals.With my expertise, you’ll receive nutrition support, evidence-based recommendations, and ongoing support delivered with confidentiality and professionalism.Let’s work together to unlock your potential and achieve the results you’ve been striving for!
