Wound Care Accounts Receivable: Keep Days in AR Below 30

Accounts receivable management is where wound care practices either build financial stability or slowly bleed cash until the practice fails. You can see 200 patients a month, bill every visit correctly, and still go under if your AR is not managed -- because revenue is not revenue until it is collected.

The benchmarks are straightforward: days in AR below 30, clean claim rate above 95%, denial rate below 5%, and AR over 90 days below 15% of total AR. Most wound care practices miss at least two of these benchmarks, and the gap between where they are and where they should be represents tens of thousands of dollars in uncollected revenue.

This post covers the operational discipline that keeps AR healthy -- from claim submission through final collection. For the mechanics of electronic claim submission, see Wound Care Electronic Billing. For the revenue model these benchmarks plug into, see Wound Care Practice Revenue Model.

The Benchmarks That Matter

Before you can improve AR, you need to measure it. These are the metrics every wound care practice should track weekly.

Days in AR (DAR). Total accounts receivable divided by average daily charges. If you have $150,000 in outstanding AR and your average daily charges are $5,000, your DAR is 30. The target for a well-managed wound care practice is 25-30 days. Above 35 days, you have a systemic problem. Above 45 days, you are financing your payers' cash flow with your practice's working capital.

Clean claim rate. The percentage of claims that pass through the clearinghouse and are accepted by the payer on first submission without rejection or denial. Target: >95%. Every claim that bounces back requires rework -- staff time to identify the error, correct it, and resubmit. At $15-$25 per rework event (including labor and opportunity cost), a 90% clean claim rate on 800 monthly claims means 80 rework events costing $1,200-$2,000 per month.

Denial rate. The percentage of claims denied by the payer after initial acceptance. Denials are different from rejections -- a rejected claim never made it to the payer (formatting error, missing field), while a denied claim was received and adjudicated as not payable. Target: <5%. Wound care denial rates run higher than general practice because of LCD compliance requirements, medical necessity documentation, and the complexity of procedure-level coding.

AR aging distribution. Break your total AR into aging buckets: 0-30 days, 31-60 days, 61-90 days, 91-120 days, and 120+ days. A healthy distribution has >70% in the 0-30 bucket and <15% in the 90+ bucket. If more than 15% of your AR is over 90 days old, those claims are approaching the point where collection probability drops below 50%.

Net collection rate. Total payments collected divided by total allowed amounts (not total charges -- allowed amounts after contractual adjustments). Target: >95%. If your net collection rate is below 95%, you are leaving money on the table through missed denials, untimely filing, or inadequate follow-up.

Clean Claims: The Foundation

AR management starts before the claim is submitted. A clean claim is one that is accepted and paid on first submission. Every claim that requires rework adds days to your AR and costs money to correct.

Eligibility verification before every visit. Verify insurance eligibility and benefits before the patient is seen, not after the claim is denied. For wound care, this means checking Medicare Part B eligibility (is the patient in a Part A SNF stay?), Medicare Advantage plan enrollment (which MA plan, what authorization requirements?), and secondary insurance status. A 2-minute eligibility check prevents a 2-week denial cycle.

Charge capture at point of service. The clinician who performs the service should capture the charges -- CPT codes, diagnosis codes, units, modifiers -- at the time of the visit, not at the end of the week from memory. Delayed charge capture introduces errors: wrong wound linked to wrong CPT code, missing modifier, incorrect unit count for debridement area. If your clinicians document in an EHR, the charge capture should flow from the clinical documentation, not from a separate billing form.

Pre-submission claim scrubbing. Before claims hit the clearinghouse, run them through a rules engine that checks for common errors: diagnosis code not supporting procedure code, missing modifier, duplicate claim, authorization not on file, NPI mismatch. Every error caught in scrubbing is a rejection prevented.

LCD-compliant documentation submitted with the claim. Wound care claims are held or denied more often for documentation deficiency than for coding errors. If your MAC requires wound measurements, conservative care documentation, or medical necessity narratives, ensure that documentation is attached to or supports the claim at submission.

Denial Management: The 48-Hour Rule

When a claim is denied, the clock starts. Every day you wait to work a denial is a day closer to timely filing limits and a day the money sits on the payer's balance sheet instead of yours.

Work denials within 48 hours of receipt. This is the single most impactful AR discipline. When an ERA/835 comes back with a denied line, someone touches that denial within 48 hours -- identifies the reason, determines the corrective action, and either resubmits or appeals.

Categorize denials by reason. Not all denials are equal.

Documentation deficiency (CO-16, CO-4). The payer wants additional documentation. Pull the chart, confirm the documentation exists, and resubmit with the supporting records.
Authorization required (CO-197). You did not get prior authorization. If authorization was obtained, submit proof. If it was not, determine whether retroactive authorization is possible.
Medical necessity (CO-50). The payer does not agree the service was medically necessary. This is the most common wound care denial and requires a clinical appeal with supporting documentation -- wound measurements, treatment history, LCD criteria met.
Coding errors (CO-4, CO-16, CO-97). Wrong code, wrong modifier, missing modifier. Correct and resubmit.
Timely filing (CO-29). You missed the payer's filing deadline. This is preventable and unrecoverable in most cases. If the delay was caused by the payer (incorrect initial denial, slow authorization response), appeal with documentation of the payer-caused delay.

Track denial patterns. If 30% of your denials are for the same reason (missing modifier 59, LCD documentation insufficient, authorization not on file), that is a systemic problem to fix at the front end, not a denial to work repeatedly at the back end. Monthly denial analysis by reason code should drive process improvements.

Payment Posting: Same-Day, Every Day

Payment posting seems administrative, but posting delays cascade through your entire AR.

Post payments the day the ERA is received. Every payment should be posted within 24 hours of ERA receipt. Delayed posting means your AR report is inaccurate, your aging buckets are inflated, and your denial follow-up is working with stale data.

Post contractual adjustments immediately. When a payer pays the allowed amount, write off the contractual adjustment at the time of posting. Do not let contractual adjustments accumulate as open balances -- they inflate your AR and make your aging report meaningless.

Identify underpayments at posting. Compare the paid amount to the expected allowed amount from the payer's fee schedule. If a payer consistently underpays by $10-$20 per claim, those small amounts add up. Flag underpayments for appeal -- many payers pay incorrect amounts and count on providers not noticing.

Secondary billing within 24 hours of primary posting. When the primary payer pays and the patient has secondary coverage, the secondary claim should be submitted within 24 hours of posting the primary payment. Delayed secondary billing is one of the most common sources of aged AR.

The Weekly AR Review

Discipline beats talent in AR management. A weekly AR review keeps problems small.

Every Monday: run the AR aging report. Sort by aging bucket. Identify every claim over 30 days and determine its status. Is it pending with the payer? Was a denial worked? Is it awaiting additional documentation? No claim should sit in the 31-60 day bucket without a documented action.

Every Monday: review denied claims from the prior week. Confirm every denial was touched within 48 hours. If any were missed, work them immediately.

Every Monday: check timely filing deadlines. Medicare has a 12-month timely filing limit. Medicaid varies by state (90 days to 12 months). Commercial payers typically allow 90-180 days. Any claim approaching its filing deadline should be escalated immediately.

Monthly: run denial rate and clean claim rate reports. Are you trending toward or away from benchmarks? If denial rate increased from 4% to 6%, what changed? New payer? New clinician? New procedure? Monthly trending catches problems before they become quarter-long revenue leaks.

When to Escalate Aged Claims

Not every aged claim is worth the same effort.

31-60 days: call the payer. If a claim has been pending for 30+ days with no ERA response, call the payer's provider services line. Get a reference number, the name of the representative, and the expected resolution date. Document the call.

61-90 days: written appeal or escalation. If the claim is denied and your initial corrected claim was not processed, submit a formal written appeal with supporting documentation. If the claim is pending and the payer cannot explain the delay, escalate to the payer's provider relations department.

91-120 days: consider your leverage. For claims this old, calculate the cost of continued pursuit versus the likely recovery. A $150 claim that has required three phone calls and a written appeal has already consumed $75 in staff time. A $500 claim is still worth pursuing.

120+ days: final effort or write-off. Claims older than 120 days have a collection probability below 30% for most payers. Make one final escalation attempt. If the payer does not resolve, write off the balance -- but document the reason for write-off and include the payer in your denial pattern analysis. If one payer consistently pushes claims past 120 days, that is a contract negotiation issue, not an AR management issue.

AR Discipline Is Practice Survival

For a wound care practice billing $50,000-$100,000 per month, the difference between 30-day AR and 45-day AR is $25,000-$50,000 in cash that is sitting with payers instead of in your operating account. That gap is payroll, supplies, malpractice insurance, and collaborative agreement fees.

The practices that survive are not the ones with the most patients. They are the ones that collect what they are owed, on time, every time. If your AR is not where it should be, the fix is not more patients -- it is better process.

Medipyxis tracks AR aging, denial rates, and clean claim metrics in real time, so you see problems when they start -- not when they have already cost you a month of revenue. See how it works.