What days in A/R actually measures
Days in A/R divides your total accounts receivable balance by your average daily charges. It aggregates everything — clean claims waiting for payment, claims held up in a payer queue, denials nobody has worked, and patient balances nobody has billed. That aggregation is its strength and its weakness: a practice can have a respectable overall number that hides a pile of 90-day-plus balances from a single payer. Always read it alongside the aging buckets, not instead of them.
The metrics that surround it
Days in A/R rarely moves alone. First-pass acceptance rate tells you how many claims the payer accepted without edits or rejection. Net collection rate tells you how much of what was billable actually converted into payment. Denial rate tells you how much work is being created downstream. When days in A/R rises, one of these is usually the culprit — most often a first-pass rate that has quietly slipped or a denial backlog that has outgrown the team working it.
Where aging balances come from
Aged balances usually trace to a few repeatable sources: denials that were never worked or appealed past their window, payments posted without being compared against the contracted rate, claims stuck in a payer's system with nobody following up, and patient balances that were never billed or re-billed after insurance finished. Each source has a different fix, which is why bucketing your A/R by reason — not just by age — is the first step to reducing it.
A disciplined follow-up approach
Effective AR follow-up is systematic rather than heroic: work balances in priority order by dollar amount and age, verify claim status directly with the payer before touching the claim, document every payer response, and escalate patterns — a payer that systematically underpays a code, for example — rather than reworking each claim individually. Consistency beats intensity. A fixed follow-up cadence worked every week outperforms a periodic 'AR clean-up sprint' that floods and then starves the queue.
How often to review
A monthly review is the practical floor: aging buckets by payer, denial patterns, posting accuracy, and the trend line of days in A/R itself. The point of the review is not to admire the numbers but to assign owners — every aging bucket over a threshold should have a named next action. Practices that review monthly, with someone accountable for each bucket, keep their A/R curve flat. Practices that review quarterly tend to rediscover problems that grew for three months.