Biz Tips | SVA Certified Public Accountants

Managing Injection Costs and Profitability in Your Ophthalmology Practice

Written by James Emmerich, CPA, CVA | Nov 12, 2026
Highlights:
  • Ophthalmology practices can improve injection profitability by evaluating drug acquisition costs, manufacturer rebates, reimbursement rates, and actual collections.
  • Coordinating medication purchases, inventory levels, vendor payment terms, and insurance reimbursements helps reduce cash flow challenges and unnecessary expenses.
  • Tracking margins by drug and payer, inventory costs, and reimbursement delays helps practice owners make informed financial and operational decisions.

Injectable medications are an important part of patient care for many ophthalmology practices, but they’re also a significant financial investment. Between purchasing expensive medications, managing inventory, navigating insurance reimbursements, and timing payments, there's a lot to consider beyond the procedure itself.

A practice may perform a high volume of injections and generate substantial revenue, but that doesn't necessarily mean those procedures are as profitable as expected.

Understanding the financial side of injections can help practice owners make better purchasing decisions, manage cash flow, and get a clearer picture of their overall profitability.

Understanding the True Cost of Injectable Drugs

The purchase price of an injectable medication is only one part of its overall cost. Drug manufacturers may offer rebates, discounts, or refunds based on purchasing arrangements or order volumes. Some practices can also benefit from credit card rewards when purchasing medications.

Taking advantage of these opportunities requires some planning and forward thinking.

For instance, some manufacturers may offer higher rebates when a practice reaches specific purchasing thresholds. Timing orders strategically could help maximize those benefits and reduce the actual cost of medications.

However, purchasing more drugs simply to reach a rebate threshold isn't always the best decision. Practices also need to consider how much inventory they're maintaining and whether those medications will be used before they expire.

The goal is to balance purchasing opportunities with inventory needs. Having accurate acquisition costs, including applicable rebates and discounts, helps practices evaluate procedure profitability and allocate expenses appropriately when calculating physician compensation.

How Reimbursement Affects Profitability

Even when the acquisition cost of a medication remains the same, the profitability of an injection varies depending on who's paying for the procedure.

Medicare, private insurance companies, and self-pay patients may reimburse at different rates. One insurance company may pay more for a particular injection than another, even though the practice incurred the same drug cost. Understanding these differences helps practice owners evaluate how reimbursement affects their financial performance.

Reimbursement rates are only part of the equation. Practices also need to pay attention to whether they're actually collecting the amounts they're owed. Claim denials, billing errors, underpayments, and unpaid patient balances can quickly create financial challenges. The practice has already purchased and administered the medication, but the expected revenue hasn't arrived.

When these issues occur, they need to be addressed promptly. Delays in correcting claims can further disrupt cash flow, and missing a payer's filing deadline could mean losing reimbursement altogether. If collections fall behind, practices may need to draw on a line of credit or delay owner compensation to cover their expenses.

Manage the Timing of Payments and Collections

One of the biggest financial challenges associated with injectable medications is the time between purchasing a drug and receiving reimbursement.

A practice may administer an injection today but not collect payment from the insurance company for days, if not weeks. Meanwhile, the medication has already been purchased, and the vendor's invoice will eventually come due. That's why payment terms are an important part of managing injection-related cash flow.

Depending on the purchasing arrangement, a vendor may offer 30-, 60-, or 90-day payment terms. Understanding those terms allows practices to better coordinate when money goes out with when reimbursement is expected to come in.

Some practices may also use credit cards to extend the payment window while earning rewards on purchases. However, this approach needs to be managed carefully to avoid creating additional costs.

Without a strategy for coordinating purchasing, payments, and collections, significant amounts of cash can become tied up in medications. That leaves less money available for other operating expenses, reinvestment, or physician compensation.

Find the Right Inventory Balance

Inventory management is another important part of injection economics.

Keeping too many expensive medications on the shelves ties up money that could otherwise be used elsewhere in the practice. But maintaining too little inventory can create challenges when medications are needed for patient treatment.

There's also the risk of expiration, spoilage, and waste. While some manufacturers may accept returns of expired medications, that's not always an option. When drugs can't be used or returned, the practice absorbs the financial loss.

New treatments and medications also continue to enter the market, making it important to avoid accumulating excessive quantities of products that may no longer be preferred.

Practices should regularly evaluate purchasing patterns, inventory levels, and anticipated patient needs to find the right balance.

Track the Numbers that Matter

Understanding injection profitability requires more than looking at total revenue or the overall cost of medications. Practices should also track a manageable set of financial measures that provide greater visibility into individual drugs and reimbursement arrangements.

Some useful metrics include:

Acquisition Cost & Reimbursement Per Injection Compare what the practice pays for a medication versus what it actually collects.
Margin by Drug & Payer Identify how profitability differs among medications and insurance companies.
Inventory Value & Days On Hand Monitor how much money is tied up in medications and how long they're sitting on the shelves.
Days to Reimbursement Understand how long it takes to collect payment after administering an injection.
Denials & Underpayments Identify collection problems that may be reducing revenue and affecting cash flow.

Tracking these measures consistently can help practice owners spot trends, evaluate purchasing arrangements, and identify opportunities to improve financial performance.

Look Beyond the Financial Statements

Financial reporting provides valuable information, but it doesn't tell the whole story. A financial statement may show that a practice is profitable and has a healthy cash balance today.

However, that doesn't necessarily account for the large drug invoices or credit card payments coming due over the next several weeks, particularly when reviewing cash-basis financial information.

Practice owners need to look forward, not just at where their finances stand today. That means understanding the entire process, from ordering and receiving medications to administering injections, billing insurance companies, collecting reimbursements, and paying vendors.

An accountant or advisor familiar with ophthalmology can help connect these activities to financial reporting, evaluate drug profitability, and identify potential cash flow challenges before they become larger problems.

For multi-owner practices, accurate tracking can also support fair allocation of drug costs and profitability when determining physician compensation.

Ultimately, clinical decisions should continue to be guided by patient needs and treatment effectiveness. But understanding the financial implications of those decisions helps practice owners manage the business more effectively.

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