What Is A/R (Accounts Receivable)?
Accounts receivable in medical billing is the total dollar amount of outstanding charges that have been billed to insurance payers and patients but not yet paid; A/R is tracked, aged, and worked by buckets (0-30, 31-60, 61-90, 91-120, 120+ days).
- Then work the aging by priority: the largest recoverable dollars in the 61-90 bucket first, then triage 90+ between appeal, write-off and patient transfer.
- The bucket-by-bucket detail sits in the A/R aging report guide.
A/R (Accounts Receivable)
Also known as: Accounts Receivable; AR; Outstanding A/R
Accounts receivable in medical billing is the total dollar amount of outstanding charges that have been billed to insurance payers and patients but not yet paid; A/R is tracked, aged, and worked by buckets (0-30, 31-60, 61-90, 91-120, 120+ days).
Definition
A/R represents the practice's unpaid claims and patient balances at any point in time. It is segmented by aging bucket (days outstanding from date of service or date of billing) and by responsible party (insurance vs patient). Insurance A/R aging shows whether claims are being adjudicated and paid timely; patient A/R aging shows collection effectiveness on patient responsibility. The two aging conventions are not interchangeable: aging from the date of service includes the lag between the visit and claim submission and so reads older than aging from the date the claim was billed. State which clock the report uses and keep it fixed, because switching conventions moves the buckets without anything changing in the business. The total A/R divided by average daily charges produces 'Days in A/R' — a topline measure of revenue cycle speed whose value depends on the charge window chosen for the denominator, and one the AAFP advises reading alongside an 'A/R greater than 120 days' view, while publishing no target percentage for that view and no aging-bucket targets at all (aafp.org, checked 17 September 2026).
Example
Illustrative arithmetic. A practice billing $1M a month, using a 30-day charge window, has average daily charges of $1,000,000 ÷ 30 = $33,333. Against $1.1M in total A/R that is 33 days in A/R ($1,100,000 ÷ $33,333). The window is a methodology choice rather than a standard — the days-in-A/R page here uses a 90-day rolling window, and a figure built on one window is not comparable to a figure built on the other. Aging that same $1.1M from the date each claim was billed: $700K at 0-30 days (normal adjudication), $200K at 31-60 (mostly ordinary payer cycles), $120K at 61-90 (payer issues surfacing), $50K at 91-120 (denial follow-up needed) and $30K past 120 days (high write-off risk). Aging the identical book from the date of service instead would shift dollars into the older buckets by whatever the charge-entry and submission lag is.
Common Misconceptions
Total A/R growing is not necessarily a problem — it should grow proportionally to charge volume. The signal of distress is A/R aging shifting older (more dollars in 90+ buckets relative to total) or Days in A/R increasing while charge volume is flat.
Practical Application
Split the aging by responsible party before reading anything into it: a 90-day insurance balance is a follow-up failure and a 90-day patient balance is a statement-and-collections failure, and the two need different teams and different playbooks. For a ceiling, keeping total A/R over 90 days under 25% is an operating convention used widely in outpatient revenue cycle work, not a published professional-society benchmark — no free primary source publishes aging-bucket targets for physician practices, so treat it as an internal threshold and set your own from your payer mix and your own trend. Then work the aging by priority: the largest recoverable dollars in the 61-90 bucket first, then triage 90+ between appeal, write-off and patient transfer. The bucket-by-bucket detail sits in the A/R aging report guide.
Related Terms
Days in A/R
Days in A/R is total accounts receivable divided by average daily charges over a chosen period — this page uses a 90-day rolling window — and represents the average number of days it takes a practice to collect on a billed charge.
Read definitionDenial Rate
Denial Rate is the percentage of claims (or claim dollars) denied by payers on initial adjudication, calculated as Denied Claims ÷ Total Claims Adjudicated × 100, typically tracked monthly and segmented by payer and denial reason category. Claims rejected before adjudication sit in neither the numerator nor the denominator — a rejection is not a denial.
Read definitionNet Collection Rate
Net Collection Rate is the percentage of allowed (contracted) revenue actually collected, calculated as Payments ÷ (Charges − Contractual Adjustments) over a rolling period; it measures how effectively a practice collects what it is contractually entitled to receive.
Read definitionAdjudication
Adjudication is the payer-side process of reviewing and determining how a claim will be paid: applying eligibility, benefits, coverage rules, contracted rates, and edits to determine the allowed amount, paid amount, patient responsibility, and any denials or adjustments.
Read definitionWhere This Applies on MedPrecision
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