The Dabbler
Why your biggest growth opportunity may be your smallest customer.
Ask most lab owners how they plan to grow and the default answer is: more customers. The instinct to add is strong. New accounts feel like progress, they're easy to count, and they're usually the first lever people reach for.
It's not always the one that pays off the most.
Every customer you already have carries a running ledger of future revenue. How long they stay with you, and how much of their work you actually do while they're there, multiplied together, is what's called their lifetime value. It's the full picture of what a relationship is worth to the lab, not just what showed up on last month's invoice.
Lifetime value quietly does most of the heavy lifting in a mature lab. New customers cost time, money, and the uncertainty of whether they'll stick. Existing customers are already paying. Keeping them longer, or earning more of their work, builds on a relationship that already exists.
So there are really three levers for growing a lab, not one.
Ways to grow your lab
Your biggest growth opportunity is in expanding share of wallet with your existing customers. Lab owners and managers tend to think about their customers by size: VIPs at the top, large and medium in the middle, dabblers at the bottom.
Typically, the instinct is to work the top, where the revenue concentrates. And you are right to work to protect and maintain that revenue. But factor share of wallet in and the biggest growth opportunity often turns out to be at the bottom of the list, not the top. The dabblers.
What the dabbler actually is
It's tempting to describe the dabbler as a small, steady customer. They're not steady, exactly, and they are not necessarily actually small. A steady customer sends a balanced mix of work, month after month, because you're their primary lab. A dabbler looks steady on a cash flow report but isn't operating that way.
The dabbler is a doctor whose primary lab is somewhere else. The work they send you is specific, usually a single procedure type or material: the thing their main lab doesn't do well, or doesn't do at all, or doesn't price competitively. Everything else goes elsewhere.
The important thing about that pattern is what it implies. They chose you for something specific, you delivered, and they've come back for that specific thing ever since. The trust is real. It's just narrow.
The math of share of wallet
A VIP customer sending $5,000 a month to you is probably giving you about 90% of their total lab work. The ceiling is real but narrow. Even if you captured everything they have left, you'd add maybe $500 to an already large account.
A dabbler sending $500 a month is a different story. They're probably giving you 10 to 15% of their work. The rest is going somewhere else. Earn the full book and that customer becomes a $3,000 to $5,000 a month account. That's a 6x to 10x increase in revenue from a relationship that already exists.
Share of wallet growth is always biggest where share is smallest. That isn't an insight, it's arithmetic. But it runs directly against the instinct to spend your time at the top of the customer list; it runs even harder against the deeper instinct to spend it chasing customers you don't have yet.
Sort your customers by what they send you each month and a familiar shape appears.
Now reveal what those same customers are sending to other labs. Toggle the revenue you already have off and what remains is the shape of the wallet that isn't yours yet.
None of this is an argument for ignoring your top accounts, or for pausing the search for new ones. Big customers earn their attention. Losing one of them hurts far more than losing a dabbler, and the retention work on large accounts matters. New customers matter too; a lab that stops adding them eventually runs down. The argument is narrower than that. After you've done the work to protect the top of your list, the next best use of your time is almost never another VIP, and it's usually not a cold outreach to a practice that's never heard of you. It's the dabbler you've been overlooking.
Keep in mind, your VIP customers are a dabbler to someone else. Another lab is looking at their book the way this piece is asking you to look at yours. Protecting the top of your list isn't just defense, it's staying a step ahead of a lab running the same playbook on you.
Why this opportunity goes untouched
If the math is that clean and the customer already trusts you, why does this opportunity sit untouched in almost every lab?
A few reasons.
The first is that the relationship feels settled. The customer sends you a predictable amount of work. It feels rude, or presumptuous, to ask for more. There's an unspoken theory that if they wanted to send you more, they would.
The second is that most labs don't have the data to frame the ask. If you don't know which procedures the customer sends and which they don't, you can't have a specific conversation. Generic requests for "more business" land poorly. A specific observation about a gap in their mix is a different conversation entirely.
The third is that nobody's job is explicitly to grow these accounts. Sales teams focus on new practices. Owners focus on top accounts and operational fires. The dabbler falls into the gap between those priorities, and the gap quietly stays a gap.
Sales is helping people out of patterns
There's a version of this problem that calls for sophisticated analytics, detailed cohort work, and operational overhaul.
And then there's the simpler version.
Most dabblers aren't small because they distrust you. They're small because they've never had a reason to reconsider where the rest of their work goes. They picked a primary lab years ago, the arrangement has been fine, and fine is usually good enough to keep a pattern running. People stay in patterns even when the patterns are suboptimal. Moving out of one takes a nudge from someone they trust.
Sales, most of the time, is that nudge. Not a pitch. Not a campaign. A conversation that sounds something like this:
That question gives you something you almost never get by asking directly: a look at how the doctor actually thinks about your lab. What do they associate you with? What do they trust you for, and what don't they? Their answer is a map of where you sit in their head; it's usually narrower than you'd guess.
Once you know that, you've earned the right to ask about the rest. A good follow-up sounds like this:
That one opens the door in the other direction. Their answer tells you where the other lab is falling short: turnaround, communication, pricing, a relationship that's gone stale. Whatever it is, you now have a specific opening to position against, and a natural reason to ask for a shot at the cases that aren't coming to you today.
Those two questions, asked from a place of genuine curiosity by someone the customer already trusts, are the single highest leverage sales activity most labs never do. It doesn't require new marketing. It doesn't require new products. It requires noticing the customer, calling them, and asking.
Some of those conversations will go nowhere. The doctor is happy with their current setup, or there's a specific reason they keep their work split. That's useful information and worth knowing.
Some of them will open doors immediately. The other lab raised prices. Their primary lab misses due date. The doctor has been meaning to consolidate but never got around to it. These doors exist in your book right now. When did you last knock on one?
What changes when you see it
The growth story most labs tell themselves is about new customers: how many, how new, how big. The story worth telling is about how much of each customer's work you actually do, and for how long. For your VIPs you already do most of it. For your dabblers, how much of their work do you actually do? When was the last time you gave them a reason to change that?
The opportunity isn't selling them something new. It's helping them update a pattern they've never been prompted to examine.
That's where the dabblers live. And the way in is almost always just to ask.
