Referral leakage in oncology: PCP and surgical inbound dynamics

May 6, 2026 · Pouyan Golshani, MD, Interventional Radiologist

Oncology referral patterns are volatile. Here’s how to measure inbound leakage and capture it.

That volatility isn’t just an operational headache for your practice manager; it’s a direct threat to the financial stability you’ve worked so hard to build. While your health system or private practice focuses on shoring up its referral base—often using sophisticated analytics to track patient flow—most of us neglect the significant “leakage” happening in our own personal finances. We focus on the clinical work, assuming our high income translates to wealth. It often doesn’t.

While your group uses tools like Referral Pulse to analyze and capture patient referrals from primary care and surgical specialties, this article provides the playbook for capturing your own financial leaks. We’ll move beyond the basics and into the specific, high-impact tax and savings strategies that are uniquely powerful for hospital-employed oncologists. For a broader look at the clinical and operational side, you can always explore the full oncology hub, but here, we’re focusing on your balance sheet.

Understanding the 199A QBI Deduction (and Why Most Oncologists Miss Out)

When the Tax Cuts and Jobs Act (TCJA) of 2017 was passed, the Section 199A Qualified Business Income (QBI) deduction was its centerpiece for small businesses. It allows owners of pass-through entities (like S-corps or LLCs) to deduct up to 20% of their business income, a massive tax savings. Naturally, physicians with side hustles or independent practices got excited. Then they read the fine print.

The catch is a provision targeting “Specified Service Trades or Businesses” (SSTBs). The IRS explicitly defines an SSTB to include “the performance of services in the field of health.” That’s us. For physicians, the 20% deduction is disallowed once your taxable income exceeds certain thresholds. For 2026, those thresholds are projected to be around $394,000 for single filers and $787,000 for those married filing jointly.

Most attending oncologists, especially in dual-income households, will sail right past these limits. The result is that a tax break worth tens of thousands of dollars to other high-income professionals is completely lost to us. It feels like a penalty for being a physician. Most of us just accept this and move on, leaving a huge amount of money on the table. The most common trap is assuming you’re automatically disqualified and not even running the numbers. But what if you could strategically lower your income to get back under that threshold?

The AGI Squeeze: How to Qualify for the 199A Deduction

Here’s where the strategy comes in. The 199A phase-out is based on your taxable income, not your gross salary. This means every dollar you can defer or deduct *before* that final number is calculated helps you claw your way back under the threshold. This isn’t about earning less; it’s about structuring your finances to legally report less taxable income.

Here is the sequence to manage your Adjusted Gross Income (AGI) down:

Max Out Pre-Tax Retirement Accounts: This is the first and most powerful lever. For 2026, this means contributing the maximum to your hospital’s 401(k) or 403(b) ($24,500 if under 50, $32,500 if 50+). If your employer offers a 457(b) plan, you can contribute another $24,500 to that, as its limit is separate. For a physician couple, that’s potentially over $100,000 in income deferred right off the top.
Leverage a Health Savings Account (HSA): If you have a high-deductible health plan, the HSA is a non-negotiable tool. Your contribution is an “above-the-line” deduction, meaning it lowers your AGI directly. For 2026, the family contribution limit is $8,750. It’s not just a health account; it’s a stealth IRA that helps you qualify for other deductions.
Charitable Bunching into a Donor-Advised Fund (DAF): Many physicians give consistently to charity each year. If your annual giving doesn’t exceed the standard deduction, you get no tax benefit. Instead, “bunch” two or three years’ worth of donations into a single year. For example, instead of giving $15,000 a year, donate $45,000 once every three years to a DAF. This large, single-year deduction can be enough to push you into itemizing and significantly lower your AGI for that year, potentially dropping you back into the 199A phase-in range.

The trap here is thinking incrementally. A single one of these strategies might not be enough, but when stacked together, they can easily reduce your AGI by $75,000 to $150,000, bringing a six-figure tax deduction back into play.

The W-2 Deduction Rescue: Using a Side Gig to Unlock Write-Offs

Another painful legacy of the TCJA was the elimination of unreimbursed employee expense deductions. Before 2018, as a W-2 employee, you could deduct costs your hospital didn’t cover: your CME travel, board exam fees, state license and DEA renewals, scrubs, and even a portion of your cell phone bill. That deduction is gone, and for most of us, it was worth thousands per year.

The fix is surprisingly simple: generate any amount of 1099 independent contractor income. This creates a small business for tax purposes, reported on a Schedule C. That Schedule C is the vehicle to rescue your lost deductions. All those professional expenses—CME, licenses, dues, subscriptions to journals, home office costs—can now be deducted as business expenses against your 1099 income.

Here’s a concrete example:

You do a few hours of telemedicine work a month, earning $8,000 in 1099 income for the year.
Your professional expenses for the year are: CME conference ($3,000), license/DEA renewals ($1,000), professional society dues ($500), and a home office deduction ($1,500). Total expenses: $6,000.
You deduct the $6,000 in expenses against your $8,000 of 1099 income. Your net business income is only $2,000.

You’ve effectively paid for $6,000 of necessary professional expenses with pre-tax dollars, a benefit you completely lost as a pure W-2 employee. The trap is thinking you need a massive, time-consuming side business. You don’t. Even a small amount of consulting, expert witness work, or medical writing is enough to open up the Schedule C and reclaim these valuable deductions.

Supercharging Savings with a Solo 401(k)

Once you have that 1099 side income, you unlock what is arguably the most powerful retirement savings tool available to a physician: the Solo 401(k). This is a retirement plan you establish for your small business (even if it’s just you). It allows you to contribute as both the “employee” and the “employer.”

Here’s how it works. For your side gig, you can contribute:

As the employee: 100% of your self-employment compensation up to the annual limit ($24,500 in 2026). This limit is shared with your W-2 401(k), so if you’ve already maxed out your hospital plan, you can’t contribute more here as an employee.
As the employer: Up to 20% of your net self-employment income. This is new, extra contribution space *on top of* what you contribute to your hospital 401(k).

The total contributions to the Solo 401(k) cannot exceed a combined limit (around $69,000 for 2026, plus catch-up contributions). For a physician with a significant side hustle, this can mean sheltering an additional $50,000+ per year from taxes, far beyond what a W-2-only employee can do. This is how you dramatically accelerate your path to financial independence.

The critical trap to avoid is the “pro-rata rule” with backdoor Roth IRAs. Many physicians have old 401(k)s that they rolled into a traditional IRA. The existence of that pre-tax IRA money poisons your ability to do a clean backdoor Roth conversion. A Solo 401(k) can be the solution: most Solo 401(k) plans allow you to roll existing IRA assets *into* them. This consolidates your pre-tax money inside a 401(k), leaving your IRA balance at zero and clearing the path for tax-free Roth conversions for years to come.

The HSA Triple-Stack: Your Ultimate Retirement Shelter

Most physicians view their Health Savings Account (HSA) as a simple checking account for medical bills. This is a colossal mistake. An HSA is the single most tax-advantaged account in the entire U.S. tax code, and it should be treated as a supercharged retirement vehicle.

The strategy is known as the “triple-stack” because of its three distinct tax advantages:

Tax-Deductible Contributions: The money you put in is tax-deductible, lowering your AGI. For 2026, a family can contribute up to $8,750.
Tax-Free Growth: Unlike a 401(k) or IRA, you must choose an HSA provider that allows you to invest your funds in low-cost index funds. The money then grows completely tax-free for decades.
Tax-Free Withdrawals: This is the key. You can withdraw money tax-free at any time for qualified medical expenses.

Here’s the how-to for the advanced strategy:

Step 1: Max out your family HSA contribution every single year ($8,750 for 2026).
Step 2: Do NOT use the HSA to pay for current medical expenses. Pay for them out-of-pocket with a credit card.
Step 3: Scan and save every single medical, dental, and vision receipt in a dedicated folder on your cloud drive (e.g., Dropbox, Google Drive). Label them by year.
Step 4: Invest 100% of your HSA balance in a low-cost stock market index fund and let it compound for 20-30 years.

Decades from now, in retirement, you will have a massive, tax-free investment account. You can then “reimburse” yourself from the HSA for all the medical receipts you’ve accumulated over the years. If you saved $150,000 in receipts, you can pull $150,000 out of the HSA completely tax-free to spend on anything you want—travel, a boat, a second home. After age 65, any funds withdrawn for non-medical purposes are simply taxed as ordinary income, just like a traditional 401(k). There is no penalty. It’s a can’t-lose proposition.

The planning trap is simple but devastating: using your HSA for small copays today. Every dollar you spend from your HSA in your 30s and 40s is a dollar that forfeits decades of tax-free compound growth. It’s the equivalent of raiding your 401(k) to pay for a prescription.