Days in A/R is the least emotional number in your practice and the most honest. It does not care how busy the schedule was or how hard the billing team worked. It tells you one thing: how long the money you have already earned sits somewhere other than your bank account.
If yours is sitting at 55, 60 or 70 days, halving it is realistic – not through more effort, but through a different sequence of work. Here is the formula, the benchmarks worth measuring against, and the six levers that actually reduce days in A/R.
The Short Answer
Days in A/R equals total accounts receivable divided by average daily charges, using gross charges from the trailing 90 days. Industry benchmarks put a healthy practice at 30–40 days, with better performers around 36 and the broader median closer to 47. The metric moves through six levers: charge lag, clean claim rate, denial turnaround, aged-bucket prioritisation, patient balance cadence, and payer-specific follow-up. A practice starting in the mid-50s can usually reach the low 40s in one quarter and the mid-30s in two.
Calculate It Correctly First
Days in A/R = total accounts receivable ÷ average daily charges, where average daily charges are gross charges over the last 90 days divided by 90.
Three details practices get wrong:
- Use a trailing 90-day window, not a single month. One month is distorted by holidays, provider leave and seasonal volume.
- Exclude credit balances from total A/R if your system reports them separately, or the figure will look better than reality.
- Read it alongside your aging buckets. A practice at 45 days with a clean distribution is healthier than one at 42 days carrying a swollen 90-plus bucket. The average hides the problem; the buckets show it.
What Good Looks Like
| Metric | Healthy range | What it tells you |
| Days in A/R | 30–40 days; better performers around 36 | Overall speed from service to cash |
| A/R over 90 days | Under 15% of total A/R | How much revenue is drifting toward write-off |
| Clean claim rate | 95%+, with strong performers at 98%+ | How much rework you are creating upstream |
| Charge lag | Encounters closed within 72 hours | Days added before a payer has even seen the claim |
Treat these as ranges, not pass-fail lines. Surgical specialties carrying heavy prior authorisation run naturally higher than primary care, and a payer mix weighted toward Medicare Advantage behaves differently from one weighted toward traditional Medicare. Compare yourself to your specialty and to your own trend first.
The Six Levers That Actually Move the Number
1. Charge Lag – The Free Days
Every day between the encounter and claim submission is a day added to the metric before any payer is involved. If your average charge lag is ten days and you get it to four, you have removed six days from A/R without touching a single payer process. Close encounters same-day where possible and never later than 72 hours, and hold providers to the documentation deadline the same way you hold billing to the submission deadline.
2. Clean Claim Rate – Stop Creating the Work
A rejected claim does not just delay payment; it restarts the clock and consumes staff time that should be spent on aged claims. Moving a clean claim rate from 90% to 95% typically removes one to three days from A/R by eliminating rework cycles. Scrubbing against current payer edits before submission is cheaper than working the rejection afterwards, every time.
3. Denial Turnaround – The 48-Hour Rule
Recovery rates fall as denials age, and unworked denials migrate into the 90-plus bucket where collection probability drops sharply. Working every denial within 48 hours of receipt does two things: it recovers more dollars, and it stops claims from ageing into the bucket that skews your entire aging report. If you only change one thing in your billing operation, change this.
Which denials to prioritise is not obvious from the report alone – our guide to the five denial codes quietly draining revenue covers the ones carrying the most recoverable value, and how denial management stops them repeating.
4. Prioritised Follow-Up – Work Dollars, Not Rows
Most A/R worklists are sorted by date or alphabetically, which means a team spends the same effort on a $40 claim as a $4,000 one. Sort by value and by proximity to the payer’s filing deadline. High-value, time-sensitive claims first, every day. This single change in worklist logic usually produces visible movement within three weeks.
5. Patient Balances – The Bucket Everyone Postpones
Patient responsibility has grown with high-deductible plans, and it collects very differently from payer A/R. Collect what you can at the point of service, verify eligibility and estimated responsibility before the visit, and run a consistent statement and follow-up cadence rather than a sporadic one. Patient balances left to age past 90 days are among the hardest dollars in the practice to recover.
6. Payer-Specific Follow-Up – Stop Treating Payers as One Group
Every payer has its own processing window, escalation path, appeal format and filing limit. A generic follow-up cadence means you call some payers before they have finished adjudicating and others long after the escalation window closed. Build the cadence per payer and per plan. This is exactly the specialisation that dedicated A/R management is built around.
A 90-Day Plan
- Weeks 1–2 – Measure honestly. Recalculate days in A/R with the correct formula. Break A/R into buckets and by payer. Total the dollars sitting past 90 days. Identify your top three denial reason codes by value.
- Weeks 2–4 – Fix the front end. Close the charge lag, tighten eligibility and authorisation verification, and put scrubbing rules in place for the errors your denial data just exposed. This stops the bleeding before you work the backlog.
- Weeks 3–8 – Run a parallel cleanup. Work the aged bucket as a separate project alongside current claims, sorted by value and filing deadline. Current claims must not slow down while old ones are recovered – that is how practices trade one problem for another.
- Weeks 4–12 – Close the loop. Review denial root causes monthly, fix the upstream workflow behind each recurring code, and track days in A/R weekly rather than monthly so you can see whether a change worked while you can still adjust it.
Is “In Half” Realistic?
It depends entirely on where you start. A practice sitting at 60 to 70 days usually has all six levers working against it at once, and fixing the obvious ones produces large, fast movement – halving is a reasonable target over two to three quarters. A practice already at 38 days will not reach 19; the remaining days are mostly payer adjudication time you cannot compress.
Be sceptical of anyone promising a fixed number without seeing your data. What is consistent is the direction: disciplined submission, fast denial work and prioritised follow-up reduce A/R days materially inside the first quarter. Ready Halo clients typically see days in A/R cut by up to a third within that window, with aged claim recovery running in parallel.
What Slow A/R Actually Costs
The cost is not abstract. On a practice billing $3 million a year in gross charges, average daily charges are roughly $8,200 – so every ten days of excess A/R is about $82,000 of earned revenue sitting in a worklist instead of your account. That is working capital not available for staffing, equipment or expansion, and a portion of it will never arrive at all once it crosses 90 days.
The other cost is quieter: aged A/R hides the problems that created it. When everything is late, nothing stands out, and a payer that quietly stopped paying a code six weeks ago looks identical to a claim that is merely slow.
Conclusion
Days in A/R does not fall because a team works harder. It falls because claims go out faster, go out cleaner, get worked in a smarter order, and denials get resolved before they age. Measure it correctly, break it into buckets, fix the front end first, then run the backlog as its own project.
If you would rather see the numbers before committing to the work, a free billing audit quantifies exactly where your revenue is stalling and hands back a prioritised recovery plan – with no obligation to switch billing providers. Book yours here, or see how our revenue cycle management team runs the whole cycle inside your existing system.
Frequently Asked Questions
How do you calculate days in A/R?
Divide total accounts receivable by average daily charges, where average daily charges are gross charges over the trailing 90 days divided by 90. Exclude credit balances if your system reports them separately, and review the result alongside your aging buckets rather than on its own.
What is a good days in A/R for a medical practice?
Commonly used benchmarks put a healthy practice in the 30–40 day range, with better-performing practices around 36 days and the broader median closer to 47. Surgical specialties with heavy prior authorisation typically run higher than primary care, so compare within your specialty and against your own trend.
How much of my A/R should be over 90 days?
Under 15% of total A/R is the widely used threshold. Above that, collection probability drops sharply and a growing share of the balance will eventually be written off.
How long does it take to reduce days in A/R?
Front-end fixes such as charge lag and clean claim rate show up within weeks. Aged A/R recovery takes longer because it depends on payer timelines and appeal windows. Most practices see meaningful movement in the first quarter and the larger gains over two to three quarters of sustained discipline.
Can very old claims still be collected?
Often, yes – provided they have not passed the payer’s timely filing limit. A structured recovery on aged A/R, run in parallel with current claims so today’s revenue does not slow down, regularly reclaims balances that would otherwise have been written off.