Fractional CFO for ambulatory surgery centers
A fractional CFO for an ambulatory surgery center is a part-time senior finance leader who runs the numbers that actually decide an ASC's money: revenue per OR-hour, margin per case with the implant loaded in, anesthesia coverage cost, payer and site-of-service mix, and the line between platform operating margin and physician-owner distributions. For a $5 to $50M ASC or office-based lab, you get that judgment for a fraction of a full-time hire, and it is the same view a buyer's quality-of-earnings team will take before a platform sale.
Where an ASC's margin actually lives
Contribution margin per OR-hour
by service line and by surgeon
Case cost with implant and device loaded
physician-preference items benchmarked
Block utilization and turnover time
idle block is fixed cost with no revenue
Anesthesia coverage cost per case
subsidy priced against real volume
Payer and site-of-service mix
ASC vs HOPD rate and implant carve-outs
Facility EBITDA vs owner distributions
the platform number a buyer will use
These are line items, not invented benchmarks. The Margin Map builds each one from your own case data.
01 · Where an ASC loses margin
The financial problems specific to surgery centers and OBLs
A surgery center is a capital-intensive business with a small number of very expensive rooms, a handful of surgeons who control the schedule, and a device cost that can swamp a case. That is a different financial machine from a physician office, and the leaks are specific to it.
Revenue per OR-hour is the real unit, and most centers do not report it
An ASC's fixed cost runs whether the room is busy or idle. The unit that decides the money is contribution margin per OR-hour, by service line and by surgeon. Late first-case starts, slow turnovers, and unused block time quietly drain that margin. Most centers see monthly volume and net revenue, not margin per OR-hour, so the fix is invisible.
The implant or device is often the largest cost in the room
In orthopedics, spine, and pain, the implant or device can be the single biggest variable cost per case, and on some payer contracts it approaches or exceeds the facility's own reimbursement for that case. Physician-preference items, rep-driven selection, and no benchmarked vendor pricing mean the center carries device cost it never negotiated. Case-costing with the device loaded in is where the margin hides.
Anesthesia coverage is a subsidy the center rarely prices
Many centers cover anesthesia through a separate group, a stipend, or a subsidy tied to case volume. When volume dips or the block schedule is soft, that coverage cost per case climbs. If the arrangement is not structured against actual utilization, the center is funding idle anesthesia time without seeing it on any report.
Distributions to owners get confused with a healthy platform
Physician-owners are paid twice: as clinicians for the professional fee, and as owners through syndication distributions. When distributions are strong, everyone assumes the platform is strong. Those are different numbers. Facility-level operating margin can be thin even while distributions look fine, and you cannot tell until the two are pulled apart.
Site-of-service migration adds cases faster than case-costing keeps up
As higher-acuity procedures move from the hospital outpatient department into ASCs and OBLs, a center can add total joints, cardiovascular, or spine cases that look like growth. Without per-case costing that includes staffing, implant, and room time, some of those new cases add revenue and subtract margin. Growth in the wrong case mix is a quiet loss.
The books are not built the way a buyer will read them
A platform buyer runs a quality-of-earnings review that separates run-rate facility EBITDA from owner distributions, normalizes physician compensation and management fees, and prices related-party rent at market. If the financials were never built that way, diligence becomes a fire drill, and every unexplained add-back costs multiple at the table.
02 · How the Command Center Method applies
What the Margin Map builds for a surgery center
The Margin Map is a fixed $7,500 diagnostic over three weeks. For an ASC or OBL, it rebuilds your reporting around the room and the case instead of the month:
- 01
Margin per OR-hour, by service line and surgeon
So the block schedule can be pointed at the cases and surgeons that actually pay, and the ones that lose money stop being invisible.
- 02
Per-case costing with the implant loaded in
Device and physician-preference-item cost sits inside each case, and underwater payer-plus-device combinations surface instead of hiding in the aggregate.
- 03
Facility EBITDA separated from owner distributions
The platform number stands on its own, apart from what flows to physician-owners as distributions or professional fees. That is the number that governs a sale.
- 04
A short list of the biggest opportunities, priced
The Margin Map identifies at least $22,500 in margin opportunities, three times its fee, or you do not pay. From there the Command Center Method moves to Build and an Operating Cadence.
On independence
Koen takes no fee, commission, or referral cut from any PE firm, buyer, device vendor, or billing company. The read on your platform is built for you, not for whoever wants to buy it or sell to it.
03 · If a platform sale is on the table
Quality of earnings, before the buyer runs it
A platform buyer prices run-rate facility EBITDA, not last year's distributions. The work that protects your multiple is done before you sign an LOI: normalize physician compensation and management fees, price related-party rent at market, clean up revenue recognition and case-level costing, and separate the money that belongs to the platform from the money that belongs to the owners.
Josh has closed five sell-side transactions and was CFO of the Walter Reed Army Institute of Research. The point of building the numbers this way early is simple: when diligence starts, there are no surprises to explain and no add-backs to defend under pressure.
See how this played out for a medical practice heading to exit.
Straight answers
Questions ASC and OBL owners ask
What does a fractional CFO do for an ambulatory surgery center?
Builds the reporting an ASC actually runs on: contribution margin per OR-hour by service line and surgeon, per-case costing with the implant and device loaded in, block utilization, anesthesia coverage cost, and payer or site-of-service mix. Separates facility operating margin from physician-owner distributions so you can see the platform, and gets the books into the shape a buyer's quality-of-earnings team will expect.
How is that different from our administrator or our accountant?
The administrator runs operations and the accountant closes the books and files taxes. Neither is built to tell you margin per OR-hour, whether a device contract is underwater on a given payer, or what your real facility EBITDA is once distributions and related-party rent are normalized. A fractional CFO owns those financial decisions without the cost of a full-time executive.
Why does revenue per case matter less than margin per OR-hour?
Because the room is the constraint. Two cases can bill the same and leave very different money behind once you load in the implant, the staffing, and the time the room was occupied. The center that knows margin per OR-hour schedules the block toward the cases and surgeons that actually pay, and stops subsidizing the ones that do not.
We are getting interest from a platform or PE buyer. When should we bring in a CFO?
Before you engage, not after. The financials a buyer prices are run-rate facility EBITDA with owner distributions and physician compensation normalized, related-party rent at market, and clean case-level costing. Building that view early protects your multiple and turns diligence into a review instead of a scramble. Josh has closed five sell-side transactions and reads the numbers the way the buyer's quality-of-earnings team will.
Does this work for an office-based lab, not a full ASC?
Yes. OBLs in cardiology, vascular, and interventional carry the same economics in a smaller footprint: capacity utilization of the lab, device and supply cost per case, the split between technical and professional components, and reimbursement pressure per procedure. The margin questions are the same, so the diagnostic is the same.
How much does a fractional CFO for an ASC cost?
The engagement starts with the Margin Map, a fixed $7,500 diagnostic over three weeks. If you continue, ongoing work runs on a monthly retainer well below a full-time CFO's total cost. A full-time healthcare CFO typically costs $275,000 to $500,000 all in; fractional work delivers the same judgment for the roughly $90,000 to $150,000 range a year.
Keep reading
Fractional CFO for medical practices
The full guide: what one does, when you need it, and how it differs from a bookkeeper or CPA.
Fractional CFO for physician groups
Provider-level profit, overhead allocation, comp models, and evaluating a PE LOI.
Fractional CFO for dermatology and med-spa
Splitting medical derm from cash-pay aesthetics, product margin, and room productivity.
Find the margin in your surgery center
Three weeks, $7,500 flat. The Margin Map finds at least $22,500 in margin opportunities, three times the fee, or you do not pay. Retainer capacity is capped at 5 clients.