Write-Off
A write-off is any portion of a charge removed from accounts receivable without payment. Contractual write-offs are required by payer contracts; non-contractual write-offs (bad debt, timely filing losses, small balances, courtesy discounts) are avoidable or discretionary. Tracking the two separately is the only way to see real revenue leakage.
- Two families
- Contractual (required) vs non-contractual (avoidable)
- Healthy target
- Non-contractual write-offs under ~3–5% of net revenue
- Needs
- Adjustment codes + approval thresholds
- Red flag
- One generic "adjustment" bucket for everything
What are the main types of write-offs?
- Contractual adjustment: billed charge minus the payer's allowed amount, mandatory under your contract. See contractual adjustment.
- Timely filing / denial write-offs: revenue lost because a claim was filed late or a denial was never worked. Entirely avoidable.
- Bad debt: patient balances that survived a full collection cycle unpaid.
- Small balance: balances below a threshold (commonly $5 to $15) where statement costs exceed the balance.
- Courtesy / hardship: discretionary discounts under a written financial policy.
The reporting sin is dumping all five into one "adjustment" bucket. Once that happens, avoidable losses hide inside the contractual number and nobody ever sees them again.
Which write-offs are required and which are leakage?
Contractual adjustments are the cost of network participation and are not a problem to solve. Everything else is a decision or a failure, and the distinction shows up instantly with real numbers. Say a practice bills $250 for a visit with a $110 allowed amount: the $140 contractual adjustment is normal. But if that claim denies for timely filing and gets written off, the practice lost $110 of real, contracted revenue, and the write-off report is the only place that loss is visible.
Benchmark yourself: pull twelve months of non-contractual write-offs by reason code. A practice with $1.2M in net revenue writing off $84,000 (7%) in avoidable categories has, conservatively, $40,000 to $60,000 a year recoverable through denial follow-up and front-end fixes. A free billing audit is the fastest way to get this breakdown if your reports cannot produce it.
What controls should govern write-offs?
- Distinct adjustment codes for every reason: contractual, timely filing, no-auth, bad debt, small balance, hardship, and so on.
- Approval thresholds: billers up to $100, supervisor to $500, owner/administrator above that. No one should be able to silently write off their own work queue.
- Monthly write-off report by reason and by user, reviewed by someone who does not post adjustments.
- Denial-linked write-offs require a denial code: a write-off tagged CO-29 or CO-197 tells you exactly which process failed.
What are the compliance traps in write-offs?
Two big ones. First, routine copay and deductible waivers for insured patients: the OIG has treated routine waivers as potential fraud since 1994, because they misrepresent your actual charge and can act as illegal inducements. Waive only for documented hardship under a written policy. Second, "professional courtesy" for referral sources: discounting care for physicians who send you patients can implicate the Anti-Kickback Statute and Stark Law. If it correlates with referrals, do not do it.
Frequently asked questions
In most billing systems they are the same transaction type with different reasons attached. Convention: "contractual adjustment" means the mandatory difference between billed charges and the contracted allowed amount, while "write-off" often refers to everything else, such as bad debt, timely filing, uncollectible balances, and courtesy discounts. What matters is coding each reason separately.
After a documented collection effort: typically three statements, at least one call attempt, and a final notice, over 90 to 120 days. Writing off earlier hides collectible money; writing off later inflates A/R days with balances that will never pay. Set a policy and apply it uniformly to avoid inducement issues.
No. Routinely waiving copays and deductibles for insured patients can violate the federal Anti-Kickback Statute and payer contracts, because it misstates your actual charge and can induce utilization. Waivers must be case-by-case, based on documented financial hardship, under a written policy.
Contractual adjustments commonly run 30% to 60% of gross charges depending on how inflated the chargemaster is, and that number alone means little. The metric that matters is non-contractual (avoidable) write-offs, which well-run practices keep in the low single digits as a percentage of net revenue.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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