Maybe you feel good and want to stay that way for decades. Maybe something has changed and you want to know why. Maybe you’ve started looking at clinics and aren’t sure what to ask, or who to trust. Whatever brought you here, you want experienced clinicians who take the time to know you. You want a team that measures its success by how you do, and gives you a straight answer even when it isn’t the one you hoped for. That includes telling you if we’re not the right fit.
Rock Creek Wellness is a physician-led concierge clinic in Leawood, Kansas, founded in 2003. We test extensively, with advanced blood work, imaging and in-office screening, because we want enough data to find the cause of a problem, not only its symptoms. Those results matter, but so does how you feel. We don’t treat numbers. We treat patients. Reference ranges describe populations, and you are one person. What’s optimal for someone else may not be right for you, so we individualize your care and keep it current with the evidence.
Why Dr. Strehlow started Rock Creek Wellness
Before Rock Creek Wellness, Dr. Mark Strehlow practiced family medicine. He never had nearly enough time with his patients. Insurance shaped much of what their care could look like: which tests, how many visits, how long each one could last.
He kept coming back to one conviction. A physician’s most useful work is finding the cause of a problem, not managing its symptoms one at a time. That kind of medicine takes time, and his schedule didn’t allow it.
So in June 2003 he founded Rock Creek Wellness to practice that way. It’s a concierge clinic. Patients pay us directly, so the length of a visit and the tests it calls for are decided by the patient and the people caring for them.
“In family practice, I rarely had the time to find out why a patient felt the way they did. I started Rock Creek Wellness so we could take that time, look for the cause, and build care around the person in front of us.”
Mark Strehlow, MD, Founder and Medical Director
In 2013 we moved to Leawood, a more central location for many of our patients. Today we also care for patients from all over the country and outside the US.
More than two decades in this field
We’ve practiced longevity and hormone medicine since 2003. Dr. Strehlow is a member of the American Academy of Anti-Aging Medicine (A4M) and the Age Management Medicine Group (AMMG), and he has attended training conferences in this field every year since we opened.
Two decades teaches what a textbook can’t. You see how people do over years, not weeks. You see which ideas in this field hold up and which fade. That experience shapes every recommendation we make, alongside the research.
Why we’re set up the way we are
Every part of how Rock Creek Wellness works is a decision. Here’s what we decided, and why.
A concierge clinic, so there’s time
Finding the cause takes longer than treating a symptom, so we schedule for it. Your first Premier Care visit is scheduled for four hours. It includes a detailed consultation with your provider and in-office testing, including an EKG and a DEXA scan. Before you leave, your provider sits down with you and goes through your results. Your cardiovascular screening imaging follows after that first visit.
Follow-up visits are scheduled for an hour, and many can be done by video. Between visits, you can call us or message us through the patient portal, and you’ll hear back within one business day.
A membership, so a question never waits on a bill
Premier Care and our HRT-Only plan are memberships. If you need an extra visit, it’s covered, and you don’t pay more. We’d rather you come in when something comes up than wait for your next appointment to save money.
Premier Care also includes limited primary care beyond hormones: lab work, imaging, prescriptions and consultations. It doesn’t replace your primary care physician.
Cash-pay, so your care is decided in the exam room
We don’t bill insurance. That keeps decisions about your care between you and the people treating you. Pharmacies, imaging centers and labs can still bill your insurance, and we accept HSA and FSA cards (your plan decides what qualifies). Our membership prices are published, so you can see the cost before you commit.
Physician-led, and never standing still
A physician oversees every patient’s care, and our physicians talk through cases with each other all the time, drawing on training in family medicine, internal medicine and gastroenterology. A hard question never rests on one person’s judgment.
Medicine keeps moving, and so do we. Our physicians review current medical literature and clinical findings continually, to stay on top of what’s working and where care can get better. When the evidence changes, our care changes with it. Whoever you see, a physician or our nurse practitioner, that work is behind your plan.
Testing first, so we start from facts
We don’t recommend anything until we have the data. That means your history, your lab results, your body composition and your cardiovascular picture. Labs are usually drawn about three weeks before your first visit, at our clinic or a lab near you, so every result is back in time. For Premier Care, that’s about 35 lab tests covering more than 100 biomarkers.
The count isn’t the point. Your provider goes through every result with you in plain language, and you keep a copy. Numbers only help when someone explains what they mean for you.
How we decide what to offer
We’d rather offer fewer things we trust than more things we don’t. Dr. Strehlow reviews the research before we add any treatment, test or product, and we won’t add or keep anything that doesn’t meet our standard.
That standard starts with the evidence. Where large, well-designed clinical trials exist, they guide us. But not everything in medicine has been studied that way yet, and some questions won’t be answered for years. Where that level of evidence doesn’t exist, we weigh the research that does exist, sound science, and more than two decades of clinical experience.
Then we tell you which is which. Where the evidence is strong, we’ll say so. Where it’s still developing, we’ll say that too, and the decision is yours.
The same standard applies to who we work with. Prescriptions go only to licensed pharmacies: 503A and 503B compounding pharmacies and commercial pharmacies. We choose every supplier and partner for quality first.
Forward-thinking, with care
The science of aging is moving quickly. Because we follow it closely, we see promising work early, and we adopt it once it meets the standard above.
You can see that in our testing. Premier Care goes beyond a standard cholesterol panel to look at cardiovascular risk in more depth, with lipoprotein(a), lipoprotein particle testing and imaging that includes a coronary calcium score. It also includes an ApoE genotype, and we offer biological age and DNA testing. Your provider explains what each result does and doesn’t tell you.
You can see it in how we think about the brain, too. A longer life matters most with a clear mind, so we built a Cognitive Health program within Premier Care. It sets a baseline for memory and thinking, tracks it over time, and adds more advanced testing only when your results, family history or symptoms call for it.
Rock Creek Wellness is also an approved site for the TB006 Expanded Access Program, with Dr. Strehlow as its Principal Investigator. TB006 is an investigational drug. It is not FDA approved, and its safety and effectiveness have not been established.
What we offer
Everything we offer comes back to the same idea: understand the whole person, then build care around what we find.
- Advanced testing: where every plan starts. Blood testing, DEXA body composition, advanced cardiovascular screening, biological age and DNA.
- Premier Care: our most comprehensive program. Testing, a personalized plan, hormone care where appropriate and limited primary care, in one membership.
- Hormone care: the care we provide most, for women and men, in every form, including pellets. HRT-Only is our entry plan.
- Cognitive health: part of Premier Care, with brain health as part of the whole picture.
- IV therapy: every IV is prescribed by a provider who has seen you.
- Regenerative treatments: tissue matrix products from an FDA-registered tissue bank. Registration is not approval, and no product of this kind is FDA approved.
- Sexual wellness: care for men and women.
- Cosmetic injectables: Botox and Juvéderm.
- Hyperbaric oxygen therapy.
Questions worth asking any clinic
There are far more clinics offering hormone and wellness care today than when we opened. Whichever clinic you choose, these questions are worth asking. Here’s how we answer them.
| The question | How we answer it |
|---|---|
| What do you test before you recommend anything? | Your history, labs, body composition and cardiovascular picture. For Premier Care, that’s about 35 lab tests covering more than 100 biomarkers, plus in-office testing and cardiovascular screening imaging. |
| How long is the first visit? | A first Premier Care visit is scheduled for four hours. Follow-ups are scheduled for an hour. |
| Who explains my results? | Your provider, in plain language. You keep a copy. |
| Is a physician involved in my care? | Yes. A physician oversees every patient’s care, and our physicians consult with each other on cases. |
| How do you decide what to offer? | Research first, weighed with more than two decades of experience. We tell you how strong the evidence is. |
| How do you keep up as medicine changes? | Our physicians review current medical literature and findings continually. When the evidence changes, our care changes with it. |
| How do I reach you between visits? | By phone or through the patient portal. You’ll hear back within one business day. |
| What if I need an extra visit? | For Premier Care and HRT-Only members, it’s covered. You don’t pay more. |
| What if what I need isn’t something you do? | We’ll tell you, and we’ll usually have a referral. |
Who you’ll see
Mark Strehlow, MD, Founder and Medical Director
A graduate of the University of Kansas School of Medicine, a family physician in practice for more than 25 years, and a Kansas Family Physician of the Year finalist (2006). Dr. Strehlow oversees and collaborates on every patient’s care. He isn’t taking new patients, except through the TB006 Expanded Access Program.
Mark McPhee, MD, MHCM
A fourth-generation Kansas Citian and valedictorian of the University of Kansas School of Medicine. He trained in internal medicine at Beth Israel and in gastroenterology at Massachusetts General Hospital, earned a master’s in health care management at Harvard, and was a Professor of Medicine at UMKC and Saint Luke’s. He is a Fellow of the American College of Physicians, the American College of Gastroenterology and the American Gastroenterological Association, with more than 100 publications. Dr. McPhee sees new patients.
Angela Barnett, MD
A graduate of the University of New Mexico School of Medicine who completed her family medicine residency at UMKC, then fellowships in integrative medicine at the University of Arizona and in anti-aging, regenerative and functional medicine. She is board-certified in family medicine and an Associate Professor at the UMKC School of Medicine. Dr. Barnett joined Rock Creek Wellness in 2026. She sees new patients, provides cosmetic injectables and cares for patients in sexual wellness.
Hannah Osborn, APRN
A board-certified family nurse practitioner who began her nursing career in hematology, oncology and bone marrow transplant at Children’s Mercy. She holds a BSN from the University of Kansas and an MSN from UMKC. Hannah sees new patients and all HRT-Only patients, places every IV we give, provides cosmetic injectables and is our primary practitioner for sexual wellness.
How to get started
If you already know you want to establish care, request an appointment or call us, and we’ll get you set up. If you’re not sure yet whether we’re the right fit, or which service fits what’s going on, book a free 30-minute consultation first. We’ll tell you honestly whether we can help.
However you start, the goal is the same. You’ll know your numbers, what they mean and what we recommend, and you’ll know who to call when something comes up. Individual results vary.
Some care isn’t right for everyone. We don’t start hormone care for anyone under 18, anyone with active cancer, or anyone who is pregnant or breastfeeding. IV therapy is for adults 21 and over and isn’t given during pregnancy. If we can’t support what you need, we’ll say so, and we’ll usually have a referral.
Request an appointment or a free consultation, or call (913) 727-7700. Questions first? Contact us.