1. The short answer
Sort drug sourcing and payments before you spend a dollar on marketing. Those two decisions determine your margin, your legal exposure and whether your revenue arrives at all. Everything else — entity, software, labs, protocol — is solvable in a week each and rarely kills a clinic.
A realistic timeline from decision to first patient is eight to twelve weeks, and a realistic starting cost is $15,000 to $40,000 depending on whether you take on a lease. Most of the range is premises and marketing, not clinical.
What follows is the order things actually have to happen in, because doing them out of order is the expensive mistake. This is an operational guide, not medical or legal advice — dosing, protocol and your state’s specific rules are for your clinical and legal counsel.
2. The sequence, with costs
Ranges, not quotes. They are here so you can sanity-check a number someone gives you, and they assume a solo or two-provider cash-pay clinic without a build-out.
| Step | When | Typical cost | What it involves |
|---|---|---|---|
| 1. Entity, licensure, insurance | Weeks 1–3 | $1,500–4,000 | LLC or PC depending on your state’s corporate-practice rules, malpractice bound, DEA registration if you will prescribe controlled substances. |
| 2. Decide your drug sourcing | Weeks 1–4 | Varies wildly | Branded GLP-1 through retail pharmacy, or compounded through a 503A/503B. This is the decision the whole business model hangs on. See below. |
| 3. Payments before marketing | Weeks 2–5 | $0–500 setup | Get a processor that knows what you are and will not freeze you in month three. Doing this after you have revenue is how clinics lose a month of cash flow. |
| 4. Software | Weeks 3–6 | $199–949/mo | Charting, e-prescribing, labs, memberships and payments. Weight loss is a subscription business, so recurring billing is not an add-on to this decision. |
| 5. Labs and protocol | Weeks 4–7 | $0–3,500 setup | Baseline panels, follow-up cadence, and who reviews them. Ordering through a lab account or a partner network. |
| 6. Intake, consent and telehealth rules | Weeks 5–8 | Legal review | Async vs synchronous, which states you are licensed in, and what your consent has to say about compounded drugs if you use them. |
| 7. Marketing and certification | Weeks 6–12 | $1,000–5,000/mo | If you advertise GLP-1 online, LegitScript certification is likely required by the ad platforms before you can spend. |
The two rows to read twice are sourcing and payments. They are the ones with no easy retrofit.
3. Drug sourcing: the decision everything hangs on
Branded or compounded is a business-model decision disguised as a clinical one.
Branded semaglutide or tirzepatide through a retail pharmacy is straightforward, defensible, and largely out of your hands on price — your patient pays what the pharmacy charges, and coverage is inconsistent. Your margin is the visit and the programme, not the drug.
Compounded changes the economics and the risk at the same time. It has been the subject of continuing FDA action and litigation through 2025 and 2026, and the rules around when compounding is permitted have moved more than once. Any clinic building its model on compounded supply should be reading primary sources and taking its own legal advice, not relying on a vendor’s summary — including this one.
Two things worth knowing whichever way you go. First, your consent and your patient communications should say plainly what the patient is receiving. Second, supply is a real operational risk: the 2026 compounding squeeze covers what happened when it tightened.
⚠️ One practical note on software: if you dispense in the clinic rather than sending a prescription out, your stock needs to move when you treat. Reconciling vials by hand at month end is fine at twenty patients and untenable at two hundred.
4. Payments: get this wrong and the money stops
Mainstream processors classify prescribing weight-loss clinics as high risk, and they enforce it after you have volume, not before.
The pattern is consistent enough to plan around: an account opens without friction, runs for a few months, and is frozen or terminated once the volume and the MCC attract review. The clinic finds out when a settlement does not arrive.
We wrote this up in detail because it kept happening to clinics that had done nothing wrong: why Stripe and Square shut down GLP-1 and TRT clinics.
What to do instead: tell a processor exactly what you do before you sign, in writing, and use one that underwrites this category deliberately. Expect to provide licences, your protocol, and your sourcing. A processor that asks nothing is not being easy on you — it is deferring the question.
And keep the recurring side separate in your head from the one-off side. A weight-loss clinic is a subscription business: monthly programme fees, card on file, failed-payment retries. That is a different set of requirements from taking a card at a front desk.
5. The business model in three numbers
Monthly programme price, patient lifetime in months, and cost of acquisition. Everything else is detail.
Cash-pay weight-loss programmes commonly sit somewhere between $200 and $500 a month, sometimes with the drug separate. The number that decides whether the clinic works is not the price — it is how many months a patient stays, and clinics consistently overestimate this in their first plan.
If acquisition costs $300 and the average patient stays four months at $300, the unit economics work. If they stay two, they do not. Build the model on a retention number you can defend, then instrument it so you find out what it really is by month six.
This is why the software decision is not just clinical. Failed card retries, a membership that pauses cleanly, and a renewal that does not need a human are retention mechanics, not billing features.
6. What the software actually has to do
Six things. Charting, prescribing, labs, recurring billing, messaging, and a way for the patient to reach you that is not your personal phone.
Weight loss is unusual among cash-pay specialties in how much of it is asynchronous. Most of the value between visits is a message, a weight logged, a dose question and a refill. If those live in three places, your team feels it every day.
Watch for the same trap as any subscription business: a product that handles a visit beautifully and a membership badly. Ask to see a patient who has been on a monthly programme for six months, missed a payment in month three, and paused in month five. That story exercises everything that matters.
The software comparison lives in its own piece: best EMR for medical weight loss and GLP-1 clinics.
7. Five mistakes that cost real money
Marketing before payments. Spending to fill a schedule you cannot collect against. Fix the processor first.
Advertising without certification. The ad platforms require LegitScript certification for GLP-1 advertisers. Budget the time as well as the fee — see what it costs.
Assuming retention. Building a plan on twelve-month patients when the data says four. Measure early.
Free text for anything that matters. Lot numbers, doses and consent in a note field are a search you cannot run when it matters.
Picking software on the demo instead of the sixth month. Everything demos well at ten patients. Ask what changes at two hundred.
8. Frequently asked questions
How much does it cost to start a medical weight loss clinic?
A realistic range for a solo or two-provider cash-pay clinic is $15,000 to $40,000 before you take on premises, with most of the variance in marketing and build-out rather than clinical setup. Entity and insurance run roughly $1,500–4,000, software $199–949 a month, and lab setup anywhere from nothing to a few thousand depending on how you order.
How long does it take to open?
Eight to twelve weeks from decision to first patient is realistic if you sequence it properly. The long poles are usually payment processing underwriting and, if you plan to advertise, certification — both of which take longer than founders expect and neither of which can be rushed at the end.
Do I need LegitScript certification?
If you advertise prescription weight-loss treatment on the major ad platforms, yes — they require it for this category. It is not a licensing requirement to operate, it is an advertising requirement, which is why clinics discover it late.
Can I prescribe GLP-1 medications via telehealth?
In many states, subject to that state’s telehealth and establishment-of-relationship rules, and subject to your own licensure in the patient’s state. GLP-1 medications are not controlled substances, so the DEA rules that complicate testosterone telehealth do not apply in the same way — but state law still governs, and it varies. Take advice for the states you intend to serve.
What software do medical weight loss clinics use?
Whatever they use has to do six things: charting, e-prescribing, labs, recurring billing, patient messaging and scheduling. The recurring billing part is what separates products that suit this specialty from products that merely allow it, because a weight-loss programme is a subscription rather than a series of visits.