DSO Explained: What PT Practice Owners Need to Know About Days Sales Outstanding
By Brianna Hall, Director of Development, Medical Billing Center
If you’ve ever looked at your revenue and wondered why cash feels tight even when your schedule is full, your DSO might be worth a closer look. Understanding this metric won’t give you all the answers on its own, but it’s a great starting point for a conversation about your practice’s financial health.
What Is DSO?
DSO stands for Days Sales Outstanding. It measures the number of days between when a claim is submitted and when payment is received. For physical therapy practice owners, it’s one of the more useful benchmarks for evaluating revenue cycle performance, though it’s important to remember that no single number tells the whole story.
How Fast Do Payers Generally Pay?
Every payer is different, and timelines vary based on plan type, claim complexity, and other factors. That said, general industry estimates tend to look something like this:
Medicare: 14–30 days | Aetna: 14–30 days | BCBS: 15–30 days | UHC: 15–33 days
These are not guarantees. Your actual experience will depend on your specific contracts and patient population.
Why Cash Flow Can Feel Slower Than Your DSO Suggests
Even when payers are processing on time, several operational factors can make your revenue feel like it’s moving slower than it should. Common culprits include posting slowdowns or delayed ERA receipt, virtual or electronic credit cards, delayed secondary claim submissions, slow processing of physical checks, and your overall payer mix. Identifying which of these apply to your practice is key to understanding what’s actually driving your numbers.
What Different DSO Ranges Generally Indicate
30–45 days is often associated with steady, predictable cash flow. At 45–60+ days, it may be worth checking for submission delays, unworked denials, or uncollected patient balances.
A very low DSO (10–15 days) isn’t always good news either. It can sometimes mean balances are being written off too soon or AR isn’t being fully pursued.
These are general averages based on industry data and if your numbers fall slightly outside these ranges, that’s not automatically a red flag, but it is worth making sure nothing important is being overlooked in your process.
Your Practice Is Unique
The real value of tracking DSO is that it opens the door to better questions. Is your billing process running smoothly? Are claims going out clean and on time? Are denials being addressed promptly? Are patient balances being followed up on? Your DSO can help surface where to look, but understanding what it means for your practice takes a closer look at the details.
At MBC, we work with physical therapy practices to make sense of their individual billing picture. Whether your numbers look off or you simply want a second opinion on where you stand, we’re here to help you understand your specific situation and figure out what a healthy revenue cycle looks like for your practice.
Take a free billing health check at https://mbc-clinic-health.info