Days in accounts receivable is one of those metrics that reveals the overall health of a revenue cycle better than almost any other single number. It measures how long — on average — it takes from the day a service is provided to the day payment is received. The higher that number, the more working capital is tied up in outstanding claims, and the more your practice is essentially financing its own operations with unpaid bills.
This guide covers how to diagnose the specific causes of elevated AR days in your practice and what to do about them systematically. The complete guide to medical billing services for healthcare providers provides a useful foundation on how AR management fits into the broader revenue cycle.
What Days in AR Actually Measures
The days in AR calculation divides your total outstanding accounts receivable by your average daily charge volume. The result tells you how many days' worth of charges are currently uncollected — a higher number means more revenue is sitting in limbo, unavailable for operations or investment.
An important nuance: days in AR is an average, which means it can mask significant variation. A practice with a healthy commercial payer base that pays quickly might have most claims paid in 20-25 days — but if there's a backlog of unworked denials and aging Medicaid claims, the average days in AR could still be 45-50 days. Looking at the AR aging distribution — not just the average — gives you a more accurate picture of what's actually happening. Revenue cycle management tips cover how to read the aging report effectively.
The Most Common Causes of Elevated Days in AR
Practices with elevated days in AR are usually dealing with one or more of the following issues, and identifying which one dominates is the key to fixing it:
- Slow initial claim submission — claims that don't go out within 24-48 hours of the service date start aging before payer processing has even begun
- High denial rates — every denial extends the payment cycle by weeks while the claim is corrected and resubmitted
- Unworked denials — claims that are denied and not followed up on never get paid, which inflates both AR days and write-offs simultaneously
- Payer processing delays — certain payers are consistently slower to process, which shows up as elevated AR from that specific payer
- Patient balance backlogs — unpaid patient balances that age without follow-up outreach, particularly from high-deductible patients
Identifying which of these is the primary driver in your practice is the first step. Healthcare revenue cycle challenges provides a framework for diagnosing the root causes of AR performance problems.
Speeding Up the Front End of Your Revenue Cycle
The fastest way to reduce days in AR is to speed up the beginning of the payment cycle — getting clean claims out quickly after service. Every day a claim sits waiting for submission is a day added to your AR days, and those delays compound across your entire claim volume.
Front-end improvements that directly reduce AR days include: same-day or next-day claim submission for all non-complex claims; real-time eligibility verification that catches coverage issues before claim submission; and pre-service authorization management that ensures authorization is in place before claims are submitted.
The American Hospital Association has documented that practices and health systems with faster claim submission timelines consistently outperform peers on AR days — because the clock doesn't start ticking on payer processing until the claim is actually received.
Denial Management as an AR Reduction Strategy
Every denial that's worked and resolved removes a claim from the outstanding AR bucket. A denial management process that resolves denials quickly — within days of the denial, rather than weeks or months — has a direct and measurable impact on AR days.
The key elements of denial management as an AR reduction strategy: prompt identification of denials through daily review of remittance data, categorization by reason, prioritization by claim value and aging, and defined timelines for appeal and resubmission. Denial management services describe what this looks like as a structured function.
Patient Balance Collection: The Overlooked AR Driver
As patient out-of-pocket costs have risen, patient balances have become a larger component of overall AR for most practices. Patient balances age differently than insurance claims — they're not subject to timely filing deadlines, but they're also harder to collect the older they get.
Point-of-service collections — collecting copays and known patient balances at the time of the visit — remove patient balance AR before it's created. Payment plans for larger balances prevent the scenario where a patient ignores a large statement because they can't pay it all at once. Patient engagement techniques covers how front-desk communication practices affect point-of-service collection rates.
The Bottom Line
Reducing days in AR isn't a single initiative — it's the result of multiple process improvements that each take a small amount of time off the payment cycle. Clean claims submitted quickly, denials worked promptly, patient balances collected at the point of service — each of these moves the needle, and together they can shift average AR days significantly over 60-90 days.
If your practice's AR days are running consistently above where they should be, the place to start is the AR aging distribution, not just the average. That distribution will tell you whether the problem is claim submission speed, denial management, patient collections, or a combination. How to increase healthcare practice revenue covers how AR reduction connects to overall practice financial performance.
Frequently Asked Questions
- What's a realistic goal for days in AR?
Most well-run practices aim to keep average days in AR below 40 days. Practices with efficient claim submission and active denial management often achieve 30-35 days. The right target also depends on your payer mix — practices with heavy Medicaid volume may run slightly higher due to Medicaid's typically longer processing times.
- If our AR days are high, where should we start?
Start with the AR aging distribution. If most of the problem is concentrated in claims 60+ days old, the issue is denial management and follow-up. If claims are aging evenly across all buckets, slow claim submission may be the primary driver. If patient balances are the main contributor, patient collection processes are the place to focus. The distribution tells you where to direct attention.
- How quickly can practices expect to see improvement after addressing AR problems?
Front-end improvements — faster submission, better eligibility verification — typically produce measurable AR improvement within 30 days. Denial management improvements take 60-90 days to meaningfully reduce the backlog of aged denied claims. Patient balance improvements take longer to fully evaluate because the collection timeline extends over months.