Think Bullish
Built by doctors, for doctors

We didn't find healthcare. We grew up in it.

Since 2017, Think Bullish has been the trusted partner for medical practices seeking predictable growth and operational excellence — not another agency that overpromises and disappears.

2017
in the trenches since
441+
practices implemented
$9.1M+
ad spend managed
91%
average retention

As seen on

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Zack Siegel, founder, with his father Dr. Wayne

Zack, the founder, on the left — and his dad, Dr. Wayne, on the right.

How it started

One practice. One promise. Then hundreds more.

Think Bullish began by helping Zack's father grow his practice. The marketing “experts” kept overpromising and under-delivering — so Zack built the system himself.

It worked. Other doctors asked for it. 441+ successful implementations and over $9.1 million in managed advertising spend later, we've perfected the art and science of practice transformation.

$9.1 million in ad spend

We've learned what each message needs to look like — and each call needs to sound like.

From living in the trenches since 2017.

Facebook & Instagram advertising spend managed
Facebook & Instagram advertising spend managedView full size ↗
Meta advertising spend managed for medical practices
Meta advertising spend managed for medical practicesView full size ↗
Google advertising spend managed for medical practices
Google advertising spend managed for medical practicesView full size ↗
Campaign performance across client accounts
Campaign performance across client accountsView full size ↗
Revenue and lead performance
Revenue and lead performanceView full size ↗
Ad-account spend summary
Ad-account spend summaryView full size ↗

Hard-won experience

125 in-house call center reps hired & fired.

We've booked thousands and thousands of appointments in-house for our clients, and our team carries far vaster experience managing in-house call centers of 300+ active agents. We've learned what medical practices need — and how to do it at scale.

300+ agents managed

Our team has run call centers at a scale most practices never see — we know exactly what breaks and why.

2 full-time QA reps

Reviewing every conversation… and countless things were still missed. Humans don't scale; that's why we built A.I. that doesn't miss.

Thousands of appointments

Booked in-house for clients — the experience behind every script, sequence, and follow-up we run today.

Our mission

We believe in good healthcare — and in handling the business of it, so you can focus on serving patients at the highest level.

That's why we've developed the first system of its kind: A.I.-powered patient communication combined with proven patient-recruitment strategies — eliminating the chaos of managing multiple vendors while delivering consistent, measurable results.

Our bullish leadership

The team behind the system.

Decades of experience in software, artificial intelligence, marketing, and medical practice growth.

Zackary Siegel

Zackary Siegel

Chief Executive Officer

Ron Rechtman

Ron Rechtman

Chief Technology Officer

Justin Siegel

Justin Siegel

Head of A.I.

Matthew Gherman

Matthew Gherman

Software Engineer

Luis Miranda-West

Luis Miranda-West

Senior Account Manager

Mickaela Tan

Mickaela Tan

Senior Media Buyer

Facebook Marketing PartnerManyChat Agency Partner
Invitation: join our mission

What you'll get in a free strategy session

  • Learn the real-time opportunities your business might be missing out on
  • A custom-built strategy for your business
Book my free demo call

Only pay for results

Get pre-paid and pre-qualified patients for your best treatment programs showing up in your office — guaranteed.

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