Office procedures + GYN ASC: the OB/GYN ownership story

OB/GYN runs on office-based procedures (LEEP, colposcopy, IUDs) and GYN surgical ASCs. Here’s the modeling.

For most of us in procedural specialties, the path to financial autonomy isn’t about seeing more consults or working more call shifts. It’s about ownership. In Obstetrics and Gynecology, this story is written in two chapters: maximizing the value of your office-based procedures and, for the GYN-focused surgeon, building or buying into an Ambulatory Surgery Center (ASC). These aren’t just clinical sites; they are economic engines. Mastering their financial and tax structure is as critical as mastering a difficult hysterectomy. This isn’t taught in residency, but it’s the language of private practice and partnership. We’ll walk through the key financial structures that define the modern OB/GYN ownership model. For a broader look at the specialty, you can find a collection of obstetrics and gynecology free tools and ASC resources on the GigHz hub.

ASC Ownership and K-1 Tax Structuring

When you buy into a GYN-focused ASC, you’re not just getting a place to operate; you’re becoming a partner in a separate business. Your return on that investment doesn’t come as a salary. It arrives on an IRS Schedule K-1, which reports your share of the partnership’s income, deductions, and credits. This is fundamentally different from the W-2 income you receive from your clinical practice, and the distinction is critical.

Here’s how it works: The surgical group (your “day job”) and the ASC are typically separate legal entities. You receive a W-2 for your clinical services from the practice. You also receive a K-1 from the ASC partnership for your share of its profits. This two-part structure allows for sophisticated planning. The first critical concept is “active” versus “passive” participation, governed by IRS §469. If your involvement in the ASC is deemed passive, any losses the ASC generates (common in early years due to startup costs and depreciation) can generally only offset other passive income. However, if you are an “active” participant—which usually requires meeting one of several material participation tests, such as spending more than 500 hours per year on the activity—those losses can potentially be used to offset your high W-2 income. For a surgeon-owner regularly performing cases at the ASC, meeting this test is often straightforward.

The trap many physicians fall into involves basis. You can only deduct losses up to your “basis” in the partnership—essentially, your financial skin in the game. Basis is calculated as the cash you contributed plus your share of partnership debt. If your buy-in was heavily financed and the ASC has a rough first year, you might receive a K-1 showing a $50,000 loss but only have $20,000 of basis, meaning you can only deduct $20,000 that year. Understanding the pro forma financials and capital structure before you invest is non-negotiable. This is where an ASC/OBL feasibility advisory engagement can model out the capital calls, debt structure, and projected earnings to ensure the deal is sound from day one.

The ‘OpCo/PropCo’ Model: Commercial Medical Real Estate

One of the most powerful wealth-building strategies for physician partners is owning the real estate where you practice. This is typically done through a structure known as “OpCo/PropCo,” where the medical practice (the Operating Company or “OpCo”) is a separate entity from the company that owns the building (the Property Company or “PropCo”).

The how-to sequence is direct:

1. You and your partners form a separate LLC to act as the PropCo.
2. This LLC acquires the medical office building, either through a purchase or ground-up construction.
3. The PropCo then signs a formal, long-term, triple-net (NNN) lease with your medical practice (the OpCo) at a fair market rate.

The financial mechanics are elegant. Your practice, the OpCo, pays rent to the PropCo. This rent is a fully deductible business expense for the practice, reducing its taxable income. The PropCo receives this rent as income. However, the PropCo can take substantial depreciation deductions on the building, which creates a “paper loss” that shelters the rental income from tax. To supercharge this, the PropCo can engage an engineering firm to perform a cost segregation study. This study identifies parts of the building (e.g., specialty wiring, cabinetry, plumbing) that can be depreciated over a much shorter period (5, 7, or 15 years) instead of the standard 39 years for commercial property, front-loading massive tax deductions into the early years of ownership.

The ultimate move here is to qualify a spouse for Real Estate Professional Status (REPS) under IRS §469(c)(7). If your spouse spends more than 750 hours per year in real property trades or businesses and more than half of their total working time on those activities, the real estate losses from the PropCo are no longer considered “passive.” This means the paper losses from depreciation can flow through to your joint tax return and directly offset your high active W-2 income from practicing medicine. The planning trap here is poor record-keeping; the IRS requires a contemporaneous log of hours to substantiate REPS qualification.

Stacking a Cash Balance Plan on Your 401(k)

For high-earning OB/GYN partners, a standard 401(k) is just the beginning. The most powerful pre-tax retirement savings vehicle available is a defined benefit plan, most commonly structured as a cash balance plan. Think of it as a supercharged, tax-deferred pension that you control.

While a 401(k) has defined *contributions* (e.g., you can contribute up to $26,000 in 2026, plus a profit-sharing component), a cash balance plan has a defined *benefit*. An actuary calculates the annual contribution needed to fund a specific lump-sum payout at retirement. Because older, higher-income partners have fewer years to save, their allowable annual contributions can be enormous—often ranging from $100,000 to over $300,000 per year, depending on age and income. These contributions are fully tax-deductible to the practice, dramatically reducing your current income tax bill.

Here’s a concrete example: A 50-year-old OB/GYN partner earning $700,000 could max out their 401(k) with a profit-sharing contribution of $73,500 (for 2026). On top of that, they could add a cash balance plan and contribute an additional $200,000. That’s over $273,000 in tax-deductible retirement savings in a single year. At a 40% combined federal and state tax rate, this strategy saves over $109,000 in taxes for that year alone.

The primary trap is complexity and cost. These plans require an actuary and a third-party administrator (TPA) to manage compliance, which adds administrative fees. They are also less flexible than a 401(k); contributions are generally mandatory once the plan is established. However, for partners in their peak earning years, the tax savings far outweigh the administrative burden. It is the single most effective tool for sheltering a large portion of your income from taxes.

The Big Warning: Section 199A Is Not for You

When the Tax Cuts and Jobs Act of 2017 introduced the Section 199A Qualified Business Income (QBI) deduction, it was heralded as a major tax break for small business owners. It allows owners of pass-through entities (partnerships, S-corps) to deduct up to 20% of their business income. However, for almost every successful OB/GYN partner, this deduction is a mirage.

The reason is a provision targeting “Specified Service Trades or Businesses” (SSTBs). The law explicitly defines the field of medicine as an SSTB. While SSTB owners can take the deduction, the benefit is completely phased out once your taxable income exceeds certain thresholds. For 2026, those thresholds are projected to be around $393,800 for single filers and $787,600 for those married filing jointly.

Most OB/GYN partners, especially those with ASC ownership and a mature practice, will have income that sails past these limits. This means your QBI deduction will be zero. The planning trap is building a financial strategy around a deduction you won’t qualify for. Many physicians hear “20% pass-through deduction” and mistakenly believe it applies to them. It doesn’t. This is a critical warning: do not count on 199A to reduce your tax burden. Your focus must be on the alternative strategies that actually work for high-income clinicians: maximizing retirement plans like cash balance plans, leveraging real estate depreciation, and structuring your ASC investment for maximum tax efficiency.

Understanding the Section 199A SSTB Phase-Out Mechanics

Let’s dig into the mechanics of why the 199A deduction disappears. The rule is designed to prevent high-income professionals in service fields from getting the same tax break as businesses that are more capital-intensive. As mentioned, the practice of medicine is an SSTB.

The phase-out works on a sliding scale. The 2026 income phase-out range for SSTBs is projected to be $343,800 to $393,800 for single filers and $687,600 to $787,600 for married couples filing jointly. If your taxable income is below the bottom of the range, you get the full 20% deduction. If your income is above the top of the range, your deduction is zero. If you fall within the range, your deduction is proportionally reduced.

Consider a married OB/GYN couple with $800,000 in taxable income. Because their income is above the $787,600 threshold, their 199A deduction from their medical practice and ASC K-1 income is eliminated entirely. It doesn’t matter how much W-2 wages the practice pays or how much equipment it owns (factors that can increase the QBI deduction for non-SSTB businesses). Once you cross that income line, the door slams shut.

This is why understanding payer rates and revenue modeling is so much more impactful than chasing phantom tax deductions. Building a profitable ASC requires a deep understanding of your case mix, supply costs, and commercial payer contracts. You can’t afford to leave money on the table with payers because you were hoping for a tax break that doesn’t exist for you. Using a tool with CenterIQ rate intelligence allows you to benchmark your reimbursement rates against local and national data, ensuring your ASC’s financial foundation is solid. The real financial gains are made on the revenue side, not by hoping for a tax law that was written to exclude you.

The journey from a salaried physician to a physician-owner is about shifting your mindset from clinical work alone to a holistic view of the business of medicine. By structuring your ASC ownership correctly, leveraging medical real estate, and using sophisticated retirement plans, you can build a financial future that gives you true professional and personal autonomy. These are the levers that create lasting wealth in a procedural specialty.

Reviewed by Pouyan Golshani, MD, Interventional Radiologist — May 21, 2026