- Once a claim passes 90 days outstanding, the chance of ever collecting it drops below 10%.
- High performers keep Days in A/R under 32-35 days. Consistently above 45 points to upstream breakdowns in eligibility, modifier logic or follow-up.
- Automated follow-up at days 14, 30 and 45 has cut DAR by 12-18 days on average. For a group collecting $2M monthly, that frees roughly $1M in working capital.
- A lower DAR isn’t always good news. Writing off aging claims faster improves the number while abandoning real revenue.
- Judge DAR alongside actual collections, not on its own.
A shrinking DAR isn’t automatically good news.
Here’s how to catch at-risk claims early and bring DAR down without hiding the problem.
There’s a specific moment in every unpaid claim’s life when it stops being “in process” and starts being “at risk.” Data shows that once a claim crosses 90 days outstanding, the probability of ever collecting it drops below 10%. Most practices don’t notice that moment until it has already passed, because nothing about the claim’s status changes visibly — it just sits, aging, until it’s effectively gone.
Days in A/R — total receivables divided by average daily charges — is the clearest early-warning signal available for catching this before it happens. High performers hold it under 32–35 days; anything consistently above 45 points to breakdowns somewhere upstream, whether in eligibility verification, modifier logic, or follow-up cadence. Groups that build automated follow-up triggers at day 14, 30, and 45 have cut DAR by 12–18 days on average — for a group collecting $2M monthly, that translates to roughly $1 million in freed-up working capital, money that was always owed but wasn’t moving.
But there’s a trap worth naming here too: DAR can be pushed down artificially just by writing off aging claims faster, which improves the number on paper while costing real money in abandoned revenue. A shrinking DAR isn’t automatically good news.
Final takeaway
So before celebrating a lower DAR figure next quarter, it’s worth asking a sharper question: did we actually collect that money, or did we just stop counting the claims that were taking too long?
Sources
- American Society of Anesthesiologists. Days in Accounts Receivable. 2015
- MedPrecision. Days in A/R (Medical Billing Glossary).
- Medical Billers and Coders. What AR Aging Gaps Impact Anesthesia Cash Flow Today?
- MBMPS. Benchmarking Anesthesia Revenue Cycle KPIs: Metrics That Matter.
- BillingBench. RCM Benchmarks: Denial Rates, Days in AR. 2025
- MGMA. Top KPIs Physician Practices Should Be Monitoring. 2023
Frequently asked questions
What does “days in A/R” measure in anesthesia billing?
Days in A/R measures the average time it takes a practice to collect payment after a claim is submitted. A lower number generally signals a healthier, faster-moving revenue cycle, as long as claims are being collected, not written off.
Why does A/R age past 90 days in anesthesia practices?
Claims typically stall once denials sit unworked, documentation gaps delay resubmission, or follow-up has no clear owner. Past that point, claims become harder to collect and more likely to end up written off.
What causes slow accounts receivable in anesthesia groups?
Slow A/R usually traces back to inconsistent claim follow-up, unclear ownership of aging accounts, and denials that sit instead of getting worked. Payer-specific rules for anesthesia time units and modifiers can also delay resolution if they aren’t tracked closely.
Does a low days-in-A/R number always mean strong collections?
Not necessarily, since a low number can mean a practice is writing off denied or underpaid claims rather than pursuing them, which shortens the average without improving the revenue actually collected.
How can anesthesia groups reduce days in A/R?
Reducing A/R days starts with routine, assigned follow-up on aging claims and clear triggers for escalation before they stall. Tracking denials and payment variances by payer helps teams fix root causes instead of chasing individual claims one at a time.