A five-person practice cannot staff a denial department, and it does not need one. The work that recovers money is narrower than most denial reports suggest: a capped weekly queue, one letter per denial reason, and three short reports that show whether the hour was spent well. What follows is the version of that system a two-provider practice can run without hiring anyone.
What this covers
- A denial queue needs a dollar floor and a deadline window, or the list grows faster than a small team can work it.
- Sort the queue by dollars at risk and days left before the payer’s filing deadline, not by the date the denial arrived.
- Original Medicare allows 120 days from receipt of the initial determination to file a redetermination, and the MAC generally answers within 60.
- A Medicare determination that the practice filed late is not an initial determination, so the appeal ladder never opens on it.
- Three reports keep the hour bounded: the queue with days left, the appeal log with outcomes, and the reason-code rollup with one owner per fix.
A queue that grows every week is a filing cabinet. A queue with a dollar floor and a deadline is a worklist.The rule for what stays out of the hour matters more than the rule for what goes in.
Two clocks run on every denial, and they are not the same clock. One is the payer’s window to challenge the decision. The other is the practice’s own window to file the original claim, which under Original Medicare is one calendar year from the date of service and does not pause for a denial, an appeal or a corrected claim. The weekly hour works only when both clocks sit on the same screen.
This is written for a practice with one or two providers, a biller, and a front desk that also runs scheduling. ABA and behavioral health practices will recognize the volume problem immediately. Unit-based codes mean one authorization failure can deny a month of sessions at once, and that single denial outweighs a stack of smaller ones.
Do the arithmetic before you build the queue
A small practice does not have a denial problem measured in thousands of claims. It has one measured in dozens. Multiply monthly claim volume by your own first-pass denial rate, then divide by four. A practice submitting 600 claims a month with 8 percent denied on the first pass faces roughly 48 denials a month, or 12 a week. Once a template exists, each appeal runs 10 to 15 minutes, so the queue fits inside an hour.
The hour holds only if the queue is filtered before it starts. Most denial reports hand the biller every denied line, including lines that were never appealable. That list cannot be worked in an hour, so high-dollar claims sit behind the noise.
| Denial you are looking at | What the reason code says | Where the fix belongs | Weekly queue? |
|---|---|---|---|
| Contractual adjustment | CO-45, charge exceeds the fee schedule or contracted rate | Nowhere. It is the gap between billed charges and the allowed amount. | No |
| Coverage ended or wrong payer | CO-27, expenses incurred after coverage terminated; CO-109, claim not covered by this payer | Front desk, at scheduling and check-in | Only to rebill |
| Missing or invalid information | CO-16, claim lacks information or has a submission or billing error | Billing, then the clinician if a note is missing | Yes, above the floor |
| Authorization absent or exceeded | CO-197, precertification or authorization absent; CO-198, authorization exceeded | Authorization tracking, before the session | Yes |
| Diagnosis does not support the code | CO-11, diagnosis inconsistent with the procedure | Coder or clinician, at charge entry | Yes, once |
| Bundled into another service | CO-97, the benefit is included in a service already adjudicated | Coder, with a modifier review | Yes, once |
| Rendering provider not eligible | CO-185, the rendering provider is not eligible to perform the service billed | Credentialing, before the first session | Yes |
| Not medically necessary | CO-50, the payer does not deem the service medically necessary | Clinician, with the record attached | Yes, with documentation |
CO-45 is not a denial. It is the contractual write-down from billed charges to the allowed amount, and appealing it asks the payer to pay above the contracted fee schedule. Every CO-45 line in the queue pushes a real denial out of the hour.
Three queue rules: a dollar floor, a deadline window, one owner
A queue needs a rule for what stays out, because the list grows faster than any small team can work it.
- Set a dollar floor. Pick the amount below which an appeal costs more in staff time than the claim is worth, and send those denials to the write-off report.
- Work inside a deadline window. Only denials with 60 days or fewer left before the payer’s filing deadline belong in the weekly hour.
- Give every denial one owner and a next action date. A denial with two owners has none.
- Separate corrected claims from appeals. They carry different deadlines and make different arguments.
- Log the reason code rather than a free-text note. Free text cannot be counted or trended.
- Cap the queue. If the hour ends with items still open, the fix is upstream rather than a longer hour.
For Original Medicare the claim had to reach the MAC within one calendar year of the date of service, and a denial does not extend that period. A corrected claim filed in month 13 fails on the filing limit, not on the correction. The exceptions at 42 CFR 424.44(b) are narrow, so count from the original date of service.
The floor is the rule practices skip, and it decides whether the hour survives. Without one, a $12 claim and a $4,000 authorization failure compete for the same 60 minutes.
Rank the queue by dollars at risk and days left
Date order is the wrong sort. A denial that arrived 20 days ago with 40 days left before the deadline is urgent. One that arrived 90 days ago with 300 days left is not. Sort by days remaining first, then by dollars.
For Original Medicare, add 120 calendar days to the presumed receipt date. Receipt is presumed five days after the notice date unless there is evidence to the contrary, so the usable window is about 115 days.
Three buckets work: inside 15 days, inside 60, and beyond 60. The first two belong in the weekly hour.
One authorization failure in a unit-based ABA practice can deny a month of sessions at once. Ranking by dollars lifts those claims above single-unit denials that cost more to appeal than they pay.
The action is specific: request records, correct and rebill, file a redetermination, or call the payer for the reconsideration address.
Record the level, the date sent, the decision date and the outcome. That record feeds the reason-code rollup.
- Denials where the payer’s decision was correct and the contract leaves no room to argue.
- Denials below the dollar floor.
- Denials with no appeal rights, which under Original Medicare includes any determination that the practice filed late.
- Claims already in a payer’s payment queue with a promised date, which need a follow-up date rather than an appeal.
The appeal templates worth keeping
A small practice needs four letters, not forty. Each is a shell with the claim facts filled in, tied to a denial category rather than to one payer.
| Template | Trigger | What has to be attached |
|---|---|---|
| Authorization appeal | CO-197 or CO-198 on an ABA or behavioral health line | Authorization number, approved unit range, session notes with start and stop times, rendering provider’s credential |
| Units and documentation appeal | CO-16, CO-151 or CO-57 | Session note with start and stop times, unit calculation, treatment plan page |
| Medical necessity appeal | CO-50 | Assessment or treatment plan, progress data for the period in dispute, clinician’s statement of why that level of service is required |
| Timely filing proof | CO-29 on a commercial or Medicaid claim | Clearinghouse acceptance report or 277CA acknowledgement showing the payer received the claim inside its window |
The four templates cover commercial and Medicaid claims. Under Original Medicare, a determination that the practice filed late is not an initial determination under 42 CFR 405.926(n), so the redetermination process does not open. The only route is an exception request under 42 CFR 424.44(b).
Every letter needs the same core facts. The regulation governing a Medicare redetermination request lists four required elements, and they make a workable checklist for any payer.
- The patient’s name.
- The Medicare number, or the member identifier that payer uses.
- The specific service or item, and the specific date of service.
- The name of the party filing, or of that party’s representative.
A written request that is not on the CMS-20027 form is accepted if it carries those elements, and CMS also asks for an explanation of why the practice disagrees. Send all evidence with the first request, because evidence that arrives later can extend the decision window. Keep a copy of everything you send: the filing date is the date the contractor receives it, not the date you mailed it.
The three reports that keep the hour bounded
The hour stays an hour only if three reports exist. Two are weekly and short. The third is monthly and answers why the same denials keep arriving.
| Report | Built from | Question it answers | Cadence |
|---|---|---|---|
| Queue with days left | Denial date, date of service, computed filing deadline, dollars at risk, reason code | Which claims are closest to a deadline that ends the argument | Weekly, one page |
| Appeal log | Every appeal filed, the level, the date sent, the decision date, the outcome, dollars recovered | Whether the appeals being filed are winning, and how long they take | Weekly to maintain, monthly to read |
| Reason-code rollup | Denials grouped by reason code with dollars, plus one named owner per upstream fix | Which two or three causes produce most of the work | Monthly |
The rollup is the report that shrinks the queue, because it moves the fix upstream and names the person who owns it. Without it, the same reason returns every month and the hour never gets shorter.
A practice-wide denial rate hides the payer producing most of the work. Split all three reports by payer at least quarterly, and split the weekly queue by payer if the practice bills more than three of them.
Two providers and one biller can maintain all three. The queue comes from the remittance file. The appeal log is a spreadsheet until it is not.
One calendar, because the deadlines differ by payer
The most common mistake in small-practice denial work is assuming one appeal window covers everything. The Medicare fee-for-service ladder alone has four, and the amount in controversy matters only from the third level. Each window below is the deadline for the request at that level.
| Payer and level | Window to file the request | Payer decision window |
|---|---|---|
| Original Medicare, redetermination by the MAC | 120 calendar days from receipt of the initial determination | Generally 60 calendar days |
| Original Medicare, reconsideration by the QIC | 180 calendar days from receipt of the redetermination decision, or 60 days if the MAC dismissed it | Generally 60 calendar days |
| Original Medicare, ALJ hearing at OMHA | 60 calendar days from receipt of the reconsideration decision; amount in controversy is $200 for 2026 | 90 days |
| Original Medicare, Medicare Appeals Council | 60 calendar days from receipt of the ALJ decision | 90 days |
| Medicaid managed care plan appeal | 60 calendar days from the date on the adverse benefit determination notice | No longer than 30 calendar days, with a possible 14-day extension |
| Medicaid managed care state fair hearing | 90 to 120 calendar days from the plan’s notice of resolution | Set by the state |
| Medicaid fee-for-service, Texas example | 120 days from the disposition date on the Remittance and Status report | Set by the state |
| ERISA group health plan internal appeal | At least 180 days from receipt of the adverse benefit determination | Set by the plan |
| Commercial example, UnitedHealthcare | 12 months to complete a claim reconsideration and then a formal appeal | Plan-defined |
| Commercial example, Aetna | 180 days for an initial claim payment dispute, with longer state-specific exceptions | Plan-defined |
Every Medicare clock runs from receipt, and receipt is presumed five calendar days after the date on the notice unless there is evidence to the contrary. Diarize from the notice date and subtract five. A redetermination request that lands on day 118 of a 120-day window is late on arrival.
The Medicare Parts A and B appeals booklet carries the full ladder and the forms, and each MAC publishes its own filing address. Put every deadline in a shared calendar with a reminder 45 days ahead. A deadline that lives in one person’s memory leaves with that person, and denial management fails quietly when that happens.
Questions about running denial management in a small practice
Budget one hour a week for the queue and the appeals, plus about an hour a month for the reason-code rollup. The weekly hour holds only if the queue is capped and filtered by a dollar floor and a deadline window. A practice that tries to work every denied line will spend far more than an hour and still leave the high-dollar claims untouched, because the list is ranked by arrival rather than by dollars or deadlines.
Skip contractual adjustments, which are the gap between billed charges and the allowed amount and are not denials at all. Skip anything below the dollar floor where the appeal costs more than the claim is worth. Skip denials with no appeal rights, which under Original Medicare includes a determination that the practice filed late. Everything else with enough dollars and enough days left belongs in the queue.
It depends on the payer. Original Medicare allows 120 calendar days from receipt of the initial determination for a redetermination, then 180 for a QIC reconsideration, 60 for an ALJ hearing and 60 for the Medicare Appeals Council. Medicaid managed care allows 60 days from the date on the denial notice, filed for the member where state law permits. ERISA plans must allow at least 180 days.
No. A determination that a provider failed to submit a claim timely is not an initial determination under 42 CFR 405.926(n), so the five-level appeal process does not open and a redetermination request is rejected on process grounds. The only route is a request for an exception under 42 CFR 424.44(b), which is granted on narrow grounds such as contractor error or retroactive Medicare entitlement.
For a Medicare redetermination, a written request that is not on the CMS-20027 form is accepted if it names the patient, the Medicare number, the specific service and date, and the party filing. Add the denial notice, the clinical documentation and any authorization record. Send all evidence with the first request, because evidence submitted later can extend the decision window and may be considered only for good cause.
Run the reason-code rollup every month and give each of the top causes an owner outside the appeal queue. A units or authorization failure belongs to whoever builds the schedule. A diagnosis and procedure mismatch belongs to whoever assigns codes at charge entry. When the fix lives upstream, the denial count falls. When it lives in the appeal queue, the queue never shrinks.
The bottom line
The queue does not need a denial department behind it. It needs a dollar floor, a deadline window, one owner per denial, and a monthly look at which reason codes keep arriving. Four letters and three reports will hold a two-provider practice together for a long time; what breaks it is a list with no rule for what stays out.
How much of your denial A/R has less than 60 days left?
Send us one month of remittance advice and your denial worklist. We will rebuild the queue by days remaining before the filing deadline, sort it by dollars at risk, split the appeal log by outcome, and name the reason codes worth fixing upstream. Our team runs medical billing services for medical practices, with a focus on ABA and behavioral health, and outsourced medical billing services for practices that want the queue run for them.
Request a free denial queue auditThis article describes general billing practice and the payer and regulatory requirements in force at the time of writing. Appeal windows, contract terms and state Medicaid rules vary by payer and by state, so confirm the deadline, the filing address and the required elements on your own denial notice before you file.
