What does a doctor actually do for $30?

SickSlip's answer: nothing clinical. You fill out a five-minute intake about why you're sick. A licensed physician reviews it. If it checks out, you get a signed, verifiable doctor's note for work or school. No video call. No exam. Just a signature on the premise that you were unfit to work for a day or two.

It launched in May 2026, founded by Dr. Adam Kawalek, an internist who says he personally wrote thousands of doctor's notes in 15 years of clinical practice. By August, the site says it had issued more than 3,500 notes across 30 states at a flat $29.99.

The business model is clear. Medical documentation is a bottleneck with one moving part: a physician willing to sign. Remove everything else — the waiting room, the exam room, the insurance claim — and what you have left is a signature-as-a-service.

The question isn't whether people want it. They clearly do. The question is whether a signature-as-a-service is a business that scales, or whether it's just a doctor working from a laptop.

Most telehealth companies tried to put an entire clinic online. Teladoc, the public market comparison, offers video visits, prescriptions, chronic care management, mental health. Its market cap is about $1.18 billion. It employs thousands of clinicians and it still struggles to grow revenue fast enough to justify its scale.

SickSlip is doing something simpler. It's not selling care. It's selling paperwork that requires a doctor's name on it.

That paperwork is more numerous than most people think. A doctor's note for work is the obvious entry point, but the same signature appears on sports physicals for kid's athletics, letters of medical necessity for HSA and FSA accounts, dive medical clearances for scuba certification, gym contract cancellation letters, school excuse notes. Every one of these requires a licensed physician to review a patient's health and attest that they meet or don't meet a standard.

None of them require a doctor to cure anything.

SickSlip's new brands make this explicit. SportSlip ($69) reviews a health history, watches a 30-second movement video on a phone, and signs your school's sports physical form. MedSlip ($69) issues Letters of Medical Necessity so you can use pre-tax HSA or FSA dollars for eligible expenses. DiveSlip ($91) reviews your medical questionnaire and signs the form that lets you get scuba certified. GymSlip is coming soon for gym contract cancellations.

The naming is almost too uniform. Every new "product" is a medical clearance that used to require a doctor's visit, now delivered asynchronously at a flat fee.

The expansion is interesting not because it shows product vision, but because it reveals the underlying constraint.

The website is explicit about one detail that most patients would miss if they didn't look: Dr. Kawalek personally reviews every case. No AI. No templates. The physician's name and National Provider Identifier — NPI 1326223306 — are printed on every document. The same doctor signs the sports physicals, the HSA letters, the dive medicals, and the original sick notes.

This is not a bug. It's the product. The company's competitive advantage is that the signature is real, traceable, and issued by a single board-certified internist who has credentials that check out. Competitors like free PDF generators have no real doctor. Traditional telehealth costs $45 to $99 for a video visit that you don't need and where the signing physician may not even be named until after. The only direct competitor in the asynchronous note space, MyTrust Medical, charges $34.99.

But here's the constraint that the product names don't address: if one doctor reviews every single case, one doctor is the throughput.

A doctor's note takes a few minutes to review. A sports physical with a video review takes longer. An HSA letter requires understanding the patient's diagnosis and the IRS rules. A dive medical requires going through the RSTC questionnaire and a short video visit. Each one has a review time floor. Even if we're generous and say each case takes five minutes of focused review, that's twelve per hour, about 100 per 8-hour day, maybe 2,000 per month with breaks, weekends, and the 30-minute video calls on the DiveSlip side.

The company has issued 3,500 notes in four months. That's about 875 per month. Which is sustainable for one doctor. Which is also what you'd expect from one doctor.

The expansion into new categories doesn't add capacity. It adds demand. If SportSlip takes off — and there's reason it might; 58 percent of U.S. youth participate in organized sports, and almost all of them need a physical — the bottleneck doesn't move. The same doctor now has to review sports physicals on top of sick notes on top of HSA letters.

Unless the company hires more doctors, or accepts that its growth is capped at one doctor's throughput, the expansion is a marketing strategy, not a scaling strategy.

There's a second layer to this. The medical-credentialing constraint isn't just about time. It's about risk.

Every signature is a legal attestation. Dr. Kawalek is licensing his professional judgment — and his medical license — to validate documents that employers, schools, scuba agencies, and the IRS will rely on. If the documents hold up, the business works. If an audit, a terminated employee, or a drowning child creates a liability event, the company's entire value rests on one doctor's malpractice insurance and professional standing.

The company mitigates this carefully. Dangerous answers on the sports physical stop the process before payment. If the dive medical raises concerns, the patient gets a full refund and a referral to an in-person doctor. GymSlip explicitly notes it can't handle states that require in-person exams. The "No Note, No Charge" guarantee on the original service is both a customer acquisition tool and a risk filter.

These are good risk controls. They also confirm the business model: the product is designed to minimize clinical risk by only touching cases that are straightforward enough to review without an exam. The moment a case gets complicated, the system refers it out.

That's smart. It's also a limit. The business can only grow by finding more categories of low-risk medical documentation. How many are there?

There's an obvious comparison to make. Teladoc has been trying to digitize the doctor-patient relationship for a decade. It failed at the ambitious part — chronic care, complex diagnoses, integrated platforms — and is now pivoting to simpler, visit-based care. Its market cap has fallen from over $20 billion in 2021 to about $1.18 billion. Investors learned that telehealth doesn't solve the hard parts of medicine and the easy parts don't generate enough margin to carry the overhead.

SickSlip has a different cost structure. No exam rooms, no nursing staff, no insurance billing, no drug supply chain, no mental health platform. Just a website, a questionnaire, and a doctor. The marginal cost of each note is the doctor's review time.

The question for anyone watching this business is: what does this look like at scale?

If Dr. Kawalek hires ten doctors, does the model still work? The brand promise — "one named physician, NPI 1326223306, reviews every case" — is part of what makes the product credible. Multiplying that across ten physicians multiplies the credentialing, the quality control, and the liability exposure. It becomes a traditional telehealth company. It loses the differentiation it built on.

If he doesn't hire, the ceiling is clear. Maybe 3,000 to 5,000 cases per month, maybe $150,000 to $300,000 in monthly revenue at average prices, minus payment processing and marketing. It's a very profitable solo practice. It's not a company that's going to raise venture capital or go public.

The expansion into sports physicals, HSA letters, and dive medicals doesn't change either equation. It just gives the same doctor more things to sign.

The way to think about SickSlip is not as a telehealth company trying to scale. It's a test of whether medical documentation — the paper you need to prove you exist in the healthcare system — can be productized.

The test result so far: yes, it can. People pay $30 for a sick note, $69 for a sports physical, $91 for a dive clearance. They want speed, they want simplicity, and they want a real doctor's name on it. The 4.7-star Trustpilot rating and the rapid uptake suggest the product works.

The open question is whether the category scales through more products or through more doctors. The former is what SickSlip is doing. The latter is what turns it into a business that can grow beyond one person's calendar.

Watch the hiring. If the company adds physicians, the model changes — and so does the risk. If it doesn't, the business will stay small, profitable, and capped. Either way, the expansion tells you more about what the founder thinks the category can be than about what it actually is right now.