Practice Ownership: The Business of Medicine

Ownership changes the question from what you produced to what the practice kept

As an employed attending, your economics fit on one line: wRVUs times a conversion factor, or a salary with a bonus formula. You watch your own production because your own production is the whole story. The day you become an owner, that line stops being the story. Your income becomes a residual — whatever remains after the practice pays the front desk, the medical assistants, the rent, the billing service, the malpractice carrier, and the electronic health record vendor. On $2,400,000 of collections in a three-physician practice, a three-point drift in the overhead ratio is $72,000 a year of partner income that quietly disappears, $24,000 of it yours. No one sends you a notice when it happens. The practices that pay their partners well are not always the ones that collect the most; they are the ones whose owners read the profit-and-loss statement the way you read a basic metabolic panel — every line, every month, with a differential in mind for anything out of range. This module teaches you to read those numbers before you buy them.

42.2%

In 2024, 42.2 percent of U.S. physicians worked in a private practice wholly owned by physicians — down roughly 18 percentage points from 60.1 percent in 2012, per the AMA's Physician Practice Benchmark Survey. The share of physicians holding an ownership stake in their practice fell from 53.2 percent to 35.4 percent over the same period, while hospital or health-system employment and private-equity ownership grew. The physicians surveyed name the drivers plainly: payment pressure, the cost of technology and administrative infrastructure, and the negotiating weight required to deal with payers. Two readings of this trend coexist. One: the economics of small-practice ownership have genuinely hardened, and the residual-income risk this module quantifies is part of why physicians sell. Two: nearly half of private-practice physicians still work in groups of five or fewer, ownership remains the only structure in which practice profit belongs to the physicians who generate it, and as fewer colleagues have owner experience, the physician who can read a P&L, a payer-mix report, and a buy-in valuation negotiates against counterparties who assume she cannot.

Source: AMA Physician Practice Benchmark Survey, 2024

Overhead ratio

A practice's operating expenses — staff, occupancy, supplies, billing, administration — divided by its collections, conventionally calculated excluding physician compensation.

Practice revenue starts as fiction and ends as fact. Charges are the fiction: payer contracts set the allowable for each code, so a $250 charge may be a $112 collection. Collections — cash actually received — are the fact, and the speed of conversion (days in accounts receivable, denial rates) determines whether the practice runs on cash or on a line of credit. Against collections sits overhead. Benchmark overhead ratios by specialty are not shown here — published ranges vary by survey, region, and how each survey categorizes expenses, which makes them a screening device at best. The ratio that sets your pay is this practice's own: compute it from three years of profit-and-loss statements, read the trend, and make the partners explain any line that moved. Owners also change the numerator and denominator: adding nurse practitioners and physician assistants, or in-office ancillary services such as laboratory and imaging, raises revenue per owner. That is leverage — and ancillary lines sit under the federal self-referral (Stark) rules, so a compliance review precedes any pro forma.

Why it matters: Once you own the practice, your pay is what survives the overhead line. A practice collecting $800,000 per physician at 58 percent overhead pays its owner $336,000; the same collections at 68 percent pay $256,000. That $80,000 gap has nothing to do with how good a clinician you are, which is exactly why owners who never learned to read the ratio underperform employed peers.

Revenue cycle

The administrative pipeline that converts clinical encounters into collected cash: coding, claim submission, payer adjudication, denial rework, and patient billing.

Between the visit and the bank deposit sits a pipeline, and every joint in it leaks. The sequence: the encounter is coded, the claim is scrubbed and submitted, the payer adjudicates it against the contract's allowable, denials come back for rework, patient balances are billed, and what survives becomes collections. Three gauges tell an owner whether the pipeline is healthy. Days in accounts receivable measures how long revenue sits between service and payment; benchmark targets are not shown here, and the reading that matters in diligence is the practice's own trend — a number climbing quarter over quarter is often the earliest visible sign of billing trouble. Net collection rate measures what percentage of the contractually collectible amount is actually collected, and on a $2,400,000 practice every point left uncollected is $24,000 of earned income that never arrives. Denial rate measures claims rejected on first submission, where the decisive question is not the rate itself but what happens next — denials that are never reworked become write-offs. These are screening gauges, not precision instruments; definitions vary by billing system, so ask how each number is computed before comparing anything. The point is that the pipeline is managed, or it decays — and its decay comes directly out of the residual that pays the owners. One document summarizes the pipeline's health in a single page: the accounts-receivable aging report, which buckets every outstanding dollar by how long it has waited — 0 to 30 days, 31 to 60, 61 to 90, and beyond. The shape of that distribution is a diagnosis. Receivables concentrated under 60 days describe a working pipeline; a fat tail past 120 days describes claims that were denied and never reworked, patient balances never pursued, or payers never chased — dollars that age into write-offs. In diligence, the aging report is also a valuation instrument: any buy-in that prices an AR component at face value, when a third of that AR sits past 120 days, is charging you full price for receivables that history says will mostly never arrive.

Why it matters: An employed physician never sees this pipeline; an owner lives on it. In diligence, three years of the seller's days-in-AR, net collection rate, and denial trends reveal more about future partner income than any recruiting conversation — a practice with strong collections and weak billing is buying its owners' income back at a discount every month.

A three-physician primary-care P&L, worked to the dollar

Three family physicians own a practice collecting $800,000 each on average. The practice employs a front office, medical assistants, and an outsourced billing service, and rents its space.

Bottom line: Each partner takes home $312,000 only because overhead holds at 61 percent — every single point of overhead ratio moves each partner's annual pay by $8,000.

Payer mix: identical medicine, $110,000 less income

A three-physician practice's clinical output is worth $2,000,000 per year at Medicare rates. Its payer mix shifts from 50 percent commercial, 40 percent Medicare, 10 percent Medicaid to 40 percent commercial, 40 percent Medicare, 20 percent Medicaid — the kind of drift a large local employer changing plans, or a hospital system steering referrals, produces in a single year.

Bottom line: A 10-point payer-mix shift the physicians never chose moves each partner's income by roughly $36,700 a year. In diligence, three years of payer-mix reports belong next to the P&L — and any buy-in priced on collections deserves a hard look at where those collections come from.

Where a payer-mix shift actually lands

Pass-through entity

A business structure — S corporation, partnership, or an LLC taxed as either — whose profits are taxed once, on the owners' individual returns, rather than at the entity level.

Nearly all physician practices are pass-through entities, so the practice profit lands on the owners' individual returns and is taxed once. The entity type still matters, because it controls the mechanics. In an S corporation, your pay splits into W-2 salary, which carries payroll taxes, and shareholder distributions, which do not. The IRS requires the salary to be reasonable compensation for the work performed; where that line sits is fact-specific and audited, which is why the split is CPA territory rather than a do-it-yourself project. In a partnership, partners commonly receive guaranteed payments — fixed amounts paid regardless of profit, taxed as ordinary income and subject to self-employment tax — with remaining profit divided under the partnership agreement. A C corporation pays a flat 21 percent federal rate, permanent since the 2017 TCJA, but its profits are taxed a second time when paid out to owners, which is why few medical practices choose it. The 20 percent qualified business income deduction, made permanent by the OBBBA in 2025, can help — but physician practices are a specified service trade or business, and the deduction phases out at higher incomes.

Why it matters: Two practices with identical profit can deliver different after-tax income and different retirement-plan capacity purely because of entity and compensation structure. You do not need to design the structure yourself; you need to understand it well enough to ask a CPA the right questions before you sign a buy-in, because the structure you buy into is expensive to change later.

Stark law and the Anti-Kickback Statute

Two federal fraud-and-abuse laws: the Stark law (civil, strict liability — self-referral for designated health services), and the Anti-Kickback Statute (criminal, intent-based — remuneration for referrals of federal program business).

In-office laboratory, imaging, and physical therapy are among the strongest levers an owned practice has on revenue per partner — and they sit inside two distinct federal laws that every prospective owner needs to be able to tell apart at the awareness level. The physician self-referral law, known as the Stark law, is a civil, strict-liability statute: it prohibits referring Medicare or Medicaid patients for designated health services — a defined list including clinical laboratory, imaging, and physical therapy — to an entity in which the physician or an immediate family member holds a financial interest, unless a specific exception is met. Strict liability means intent is irrelevant; a technically deficient arrangement creates repayment exposure no matter how good-faith the referrals were. The most common shelter for group practices is the in-office ancillary services exception, which carries detailed requirements about who performs the service, where, and how it is billed. The Anti-Kickback Statute is the other law and works differently: it is a criminal, intent-based statute prohibiting knowingly offering or receiving anything of value to induce referrals of federal health care program business, with regulatory safe harbors for common arrangements. A practice can satisfy one law and violate the other. Neither is a reason to avoid ancillary income — both are reasons the compliance posture of that income is part of its price.

Why it matters: If $400,000 of the income stream you are buying into depends on an ancillary line, its value is contingent on continuing compliance with an exception or safe harbor. A healthcare attorney's review of that posture is diligence on the asset itself — awareness of the two laws is what tells you to commission the review. This is awareness-level education, not legal advice.

The same goodwill, two methods, two different prices

An associate is quoted a buy-in for a one-third interest in the three-physician practice from the P&L lesson: $2,400,000 in collections and $312,000 partner draws. The excess-earnings method needs a compensation baseline, and the one the associate can actually verify is her own employed pay at this practice.

Bottom line: Whoever picks the goodwill method picks a five-figure swing in the price. The valuation workpapers — not the final number — are the document to request, and an independent CPA re-running goodwill under at least two methods is the cheapest insurance in the entire transaction.

Buy-in traps: paying twice for work you already did

Three traps appear in buy-in proposals often enough to check for by name. First, goodwill method games: goodwill can be valued as a percentage of revenue, as capitalized excess earnings, or by comparable-sale data, and the same practice can produce figures $50,000 or more apart depending on the method chosen. The method is a negotiating position, not a law of nature. Second, buying your own receivables: if the buy-in includes a share of accounts receivable, some of that AR may be collections from work you personally performed during your employed years — meaning you are paying the partners for income your own hands generated. Third, the private-equity trapdoor: if the practice sells to a PE platform during or shortly after your partner track, earnout and rollover-equity structures decide whether your buy-in converts to sale proceeds or gets stranded at its original price. Practice has varied widely here — the agreement controls, not the recruiting conversation.

How to avoid it: Request the valuation workpapers, not just the number, and have an independent CPA who works with medical practices re-run goodwill under at least two methods. Quantify how much of the practice AR your own production created before agreeing to buy any of it. Ask, in writing, what happens to your buy-in if the practice sells within five years, and require the answer to appear in the purchase documents. Engage a healthcare attorney before signing anything.

The signatures that follow you out the door

The buy-in check is the visible cost of partnership. The invisible costs arrive as signature lines: a personal guarantee on the office lease — often a ten-year obligation that landlords will not release merely because a partner leaves — joint liability on the practice's line of credit, equipment financing, and, in some partnership agreements, responsibility for a share of a departing partner's malpractice tail. These obligations frequently survive the events physicians assume would end them. A partner who leaves in year four of a ten-year lease can remain personally liable for six more years of rent if the departure terms are silent; a practice that borrows to expand can leave every guarantor exposed for the full balance, not a proportional share, because commercial guarantees are typically joint and several. None of this appears in the income projections that sell the partnership, and much of it is negotiable — before signing, and nearly impossible to fix after.

How to avoid it: Build a complete inventory of every obligation the partnership documents ask you to guarantee: lease, credit lines, equipment notes, tail provisions. For each, ask three questions in writing — is the guarantee capped, is it several rather than joint and several, and is there an automatic release when a partner departs or the obligation is refinanced. A healthcare attorney maps this exposure as part of any competent buy-in review; the review fee is trivial against a six-year rent guarantee.

The offer letter and the missing spreadsheet

Check yourself: what a 5 percent revenue dip does to the residual

1.35×

In a 2025 multi-institution study of U.S. physicians, poor control over patient-load volume was associated with 1.35 times the odds of burnout, and poor control over workload, clinical schedule, and clinical team composition were each independently associated with burnout — and with intent to reduce clinical hours — after adjusting for personal and professional characteristics. Set that finding beside what ownership structurally is: the owners set the schedule template, choose the staff, decide the patient load, and select which payers and service lines the practice carries. Those are precisely the control domains the burnout literature identifies, held as governance rights rather than requested as accommodations. The trade is symmetrical and honest: this module has priced the cost side — residual-income variance, payer-mix exposure, guarantees, buy-in capital at risk — and the burnout evidence prices the other side, in career sustainability rather than dollars. Nationally, 45.2 percent of physicians reported at least one burnout symptom in 2023. For some physicians, employed structure with a guaranteed floor is the sustainable choice; for others, the control that ownership confers is the single most valuable line in the deal — one that never appears in the P&L.

Source: Shanafelt et al., Annals of Internal Medicine, 2025

Own the numbers before you own the practice

• Owner income is a residual, so every point of overhead ratio in the worked three-physician practice moves each partner's pay by $8,000 a year, and revenue swings hit partner pay amplified.
• The overhead ratio worth trusting is the one you compute from the practice's own profit-and-loss statements across three years — read the trend, then audit the lines that moved.
• Entity structure changes how identical profit reaches you: S corporation salary-and-distribution splits and partnership guaranteed payments are CPA territory, not do-it-yourself territory.
• The three costliest buy-in traps are goodwill priced by a conveniently chosen method, accounts receivable your own work created, and sale clauses that strand your equity in a private-equity transaction.
• Ancillary revenue is real owner economics, but it exists only inside the federal self-referral rules — a healthcare attorney confirms compliance before that income belongs in your buy-in math.

Do this next: Before your next partnership conversation, request three years of practice profit-and-loss statements plus the current accounts-receivable aging report, and schedule a review of both with a CPA who works with medical practices.