If a behavioral health operator could watch only one number to understand the health of their revenue cycle, it should be days in accounts receivable. Census tells you whether patients are coming in. Days in A/R tells you whether the revenue those patients generate is actually turning into cash — and how fast. It is the earliest and most honest warning sign a facility has, because it moves before the bank balance does.
Most operators watch cash in the account, which is a lagging indicator. By the time cash is tight, the problem that caused it happened weeks or months earlier. Days in A/R surfaces that problem while there is still time to fix it.
What days in A/R actually measures
Days in accounts receivable measures the average number of days it takes to collect payment after a service is billed. It answers a simple question: on average, how long is your earned revenue sitting unpaid?
The standard calculation is straightforward:
Days in A/R = Total current accounts receivable ÷ Average daily charges
To get average daily charges, take your total gross charges over a period — 90 days is a common window that smooths out short-term noise — and divide by the number of days in that period. Then divide your current total A/R by that figure.
For example, if you have $900,000 in outstanding receivables and your average daily charges over the last 90 days are $15,000, your days in A/R is 60. On average, it is taking two months to collect what you have billed.
A few practical notes. Use gross charges consistently, measure it the same way every month so the trend is comparable, and calculate it regularly rather than once a quarter. The trend matters more than any single reading.
What a healthy number looks like
There is no universal target that fits every facility, because payer mix, level of care, and whether you are in or out of network all move the baseline. Out-of-network programs and those weighted toward residential care will naturally run higher than in-network outpatient programs.
That said, the direction of travel is what matters most. A days-in-A/R figure that is stable or trending down is a sign of a healthy, well-run revenue cycle. A number that is climbing month over month is a warning, regardless of its absolute value — it means claims are aging faster than you are collecting them, and cash-flow pressure is coming.
It also helps to look beyond the single average. Aging buckets — the percentage of your A/R that is 0 to 30 days, 31 to 60, 61 to 90, and over 90 — tell you where the money is stuck. A facility with a reasonable average but a large share of receivables sitting past 90 days has a hidden problem the headline number is masking.
What drives the number up
When days in A/R climbs, the cause is almost always one or more of these:
- Slow or incomplete verification that leads to eligibility denials weeks after admission.
- Authorization gaps that hold up payment until resolved.
- Denials that are not worked promptly, so claims age in the appeals queue.
- Coding and submission errors that trigger rework and resubmission cycles.
- Weak follow-up on unpaid claims, letting them drift into the older aging buckets.
- Poor payer mix management, where a concentration of slow-paying payers drags the whole average.
Notice that every one of these is a process issue, and every one connects back to earlier stages of the revenue cycle. Days in A/R is a summary statistic — it aggregates the health of verification, authorization, billing, and collections into a single number. That is exactly why it is so useful as an early indicator.
How to bring it down
Reducing days in A/R is not about collecting harder at the end. It is about fixing the causes upstream and staying disciplined on follow-up:
- Tighten verification so eligibility denials stop appearing weeks after admission.
- Track every authorization deadline so no claim is held up for a preventable reason.
- Work denials within days, not weeks — the older a claim gets, the less likely it is to be collected in full.
- Scrub claims before submission to eliminate rework cycles that add weeks to the collection timeline.
- Follow up on aging claims relentlessly, with a systematic cadence rather than ad hoc chasing.
- Watch your aging buckets, not just the average, so nothing quietly slides past 90 days.
A useful discipline: for new engagements, the fastest wins usually come from working the oldest, most neglected claims first while simultaneously tightening the front end so fewer new claims age. Progress on both ends at once is what moves the number.
Why this is the metric to watch
Days in A/R is the closest thing a behavioral health facility has to a single vital sign for its finances. It integrates the performance of the entire revenue cycle, it moves before cash flow does, and it points you toward the specific stage that is failing when it climbs. An operator who watches it monthly, tracks the trend, and reads the aging buckets underneath it will see financial problems coming with enough runway to fix them.
If you are not tracking days in A/R, or you are watching it climb and are not sure why, that is exactly the kind of thing a fresh set of experienced eyes can diagnose quickly. Centerline’s free billing review includes a look at your days in A/R and aging, and where the delays are coming from. You can request one here.