...

About MD Total Wellness

At MD Total Wellness, we’re redefining what wellness care looks like in Orange County. Unlike online telehealth companies or cookie-cutter clinics, we’re a physician-owned medical practice offering personalized, results-driven care — in person, not over a screen. We believe in-person care is better care.

Dr. Oliak and PA Mollet have worked together since 2006 — first in Dr. Oliak’s bariatric surgery practice, now in functional wellness. They founded MDTW to address a growing gap in traditional healthcare: expert, evidence-based hormone therapy, safe and effective weight loss, and personalized wellness solutions that genuinely improve quality of life.

Dr. Oliak’s decision to transition from surgery to wellness wasn’t just professional — it was personal. His own experience with testosterone therapy in 2023 was transformational, reinforcing his belief that these treatments change lives. PA Mollet brought the same conviction about hormone therapy for women, having experienced its benefits firsthand. MDTW exists because they both believe in what they offer.

Your safety, your results, and your long-term success are always our top priority. We take the time to listen, understand, and guide you — with care that’s personal, evidence-based, and built around your goals.

a man (Dave) and woman (Allie) wearing white lab coats

Meet Our Team

  • Dave and Allie e1747162041599

    David Oliak, MD

    Physician, Medical Director
    Read Full Bio
  • Allie e1747162125405

    Allison Mollet, PA-C, MSCP

    Physician Associate
    Read Full Bio
  • Casie e1748912818260

    Casie Sleep

    Office Manager
  • Ashley e1748920995115

    Ashley Apodaca

    Lead Medical Assistant and Phlebotomist
  • Aubree

    Aubree Saldana

    Medical Assistant and Phlebotomist
man doing workout

Ready To Feel Like Yourself Again?

Dr. Oliak and PA Mollet are ready to help. Take the first step toward better energy, a healthier weight, and a quality of life you deserve.

Real Patients, Real Results

I visited MD Total Wellness for the first time yesterday afternoon, and I couldn’t be more impressed. I live nearby and have passed their building many times, but never realized they offered peptide t…

Frame 133

LaShonda S.

bxs quote alt right

Everyone here is so sweet! As soon as you walk in, you are greeted by Casie’s bright smile and a cozy seating area! My visit was for weight loss, and Allie was very thorough in explaining all o…

Frame 133

Caitlin C.

bxs quote alt right

PA Allison Mollet, is wonderful. She is very careful to watch my labs and evaluate how l am progressing. During our consultation she takes her time and is able to explain how my bo…

Frame 133

Gerry Verpooten

bxs quote alt right

Have Questions? We’ve Got Answers

We are conveniently located in Brea, CA, at 255 W Central Ave, Suite 203. Our service area includes Brea, Yorba Linda, Anaheim Hills, Fullerton, Placentia, and surrounding Orange County and Los Angeles County cities.

Choose MDTW because our providers bring something most wellness clinics can’t: over 20 years of shared clinical experience, starting in bariatric surgery and now in functional wellness. We’re physician-owned, in-person, and deeply invested in your results — not a telehealth company, not a franchise. We offer evidence-based treatments for hormone health, weight loss, sexual health, hair restoration, and more, with personalized care that treats you as an individual. Schedule a free consult to experience the difference.

Dr. David Oliak, MD, and PA Allison Mollet, PA-C, have worked together since 2006 — first in Dr. Oliak’s bariatric surgery practice, now in functional wellness at MDTW. Dr. Oliak is board-certified and brings deep clinical expertise in weight loss that few GLP-1 providers can match. PA Mollet is menopause-certified and specializes in helping women navigate hormonal changes. Together, they’ve helped thousands of Orange County patients achieve lasting results. Book a free consult to meet them.

Testosterone replacement therapy (TRT) can be life-changing for men with low testosterone. Low testosterone is common, even in younger men, and has become more prevalent over time — studies show average testosterone levels have dropped by at least 25% over the past several decades.

Symptoms of low testosterone include low energy, fatigue, low sex drive, weak or less frequent erections, ED, loss of muscle, weight gain, low metabolism, low motivation, irritability, anxiety, depression, and feeling past your prime. Men often attribute these symptoms to normal aging — but they are frequently due to hormone loss, and they are treatable.

If any of these symptoms sound familiar, schedule a free consult and in-office blood test to find out if testosterone therapy is right for you.

Bioidentical hormone therapy is among the most effective treatments available for perimenopause and menopause symptoms — addressing the root cause rather than masking symptoms. These include hot flashes and night sweats, vaginal dryness and atrophy, brain fog, irritability, low libido, difficulty achieving orgasm, joint pain, mood changes, heart palpitations, and migraine headaches.

Beyond symptom relief, bioidentical hormone therapy may also reduce the risk of chronic conditions including heart disease, osteoporosis, and dementia — making it one of the most impactful long-term wellness investments available. Schedule a free consult with PA Mollet to find out if hormone therapy is right for you.

MDTW’s GLP-1 weight loss program combines quality-vetted compounded semaglutide or tirzepatide with physician oversight, personalized dosing, nutrition and lifestyle guidance, and body composition tracking — all at prices below brand-name alternatives.

What sets us apart is the depth of experience behind your care. Dr. Oliak performed over 3,000 bariatric surgeries before transitioning to GLP-1 weight loss — giving him a clinical understanding of weight management that most GLP-1 providers simply don’t have. Together, he and PA Mollet have specialized in weight loss for over 20 years and helped thousands of patients achieve lasting results. Schedule a free consult to get started.

No — and here’s why that works in your favor. By not billing insurance, we eliminate prior authorizations, surprise bills, and the time pressure that rushes most medical appointments. You get unhurried, focused care with a provider who actually knows you. We accept all major credit/debit cards, HSA and FSA, and offer 0% financing for treatment packages.

Our prices for hormone therapy and weight loss are listed on our individual service pages. We offer transparent monthly pricing with no time commitments, so you cancel anytime. For procedures, such as Alma TED, EmSella, and EmFemme, price depends on the number of treatments prescribed, and is determined after your consultation.

LaShonda S.

I visited MD Total Wellness for the first time yesterday afternoon, and I couldn’t be more impressed. I live nearby and have passed their building many times, but never realized they offered peptide therapies. After researching beauty peptides, specifically GHK Cu, I knew I didn’t feel comfortable purchasing from an unknown online source.

From the moment I walked in, the experience was exceptional. The facility is beautiful and welcoming, and the service was truly top-notch from the front desk team, to the intake nurse, to the physician. Dr. Oliak took time to thoroughly discuss my treatment plan, dosage, follow-up schedule, and sourcing standards, which immediately put me at ease and reinforced my confidence in moving forward.

I am genuinely happy to have found MD Total Wellness and look forward to continuing my care here. Highly recommend.

Caitlin C.

Everyone here is so sweet! As soon as you walk in, you are greeted by Casie’s bright smile and a cozy seating area! My visit was for weight loss, and Allie was very thorough in explaining all of my options and what would be best for my lifestyle! As someone who has numerous doctor’s appointments, it was very refreshing to have someone who is not only personable, but also genuinely cares about my history and goals. I highly recommend this sweet group if they have what you are looking for! Thank you MD Total Wellness!

Gerry Verpooten

PA Allison Mollet, is wonderful. She is very careful to watch my labs and evaluate how l am progressing. During our consultation she takes her time and is able to explain how my body is responding to medication ( specifically glp-1 and hormones) She is by far a caring and very knowledgeable physician! I highly recommend MD wellness !