Denial Management Process: Building a Denial Workflow From Intake to Prevention

The first time we opened the denial work queue at a four-physician orthopedic practice, it held 612 items. The biller was working it the only way she could, newest first, because the newest ones still had time left on the appeal clock. Buried at the bottom were denials from eleven months earlier, most of them CO-197 (no prior authorization) for the same two injection codes, from the same two payers, for visits scheduled by the same front desk. Nobody had ever told the front desk. The biller had been appealing, one at a time, a problem that a two-line change to the scheduling script would have stopped.

That is the pattern we see in nearly every practice that asks for help with denials. The work is being done by the one role that cannot prevent any of it. A denial management process worth the name assigns each denial to the role that created it, gives that role exact steps, and measures whether the denial stops recurring. This playbook is organized by role for that reason.

The denial management process has five stages: intake (collect every denial daily from the 835 remittance, the clearinghouse rejection report and paper remittances), triage (sort by adjustment reason code into the root-cause category and the role that owns it), resolution (correct and resubmit, appeal in writing, or write off with a documented reason, each inside its deadline), root-cause review (a monthly look at the top denial reasons by dollars) and prevention (a change to the upstream step, with a check that the denial rate for that reason falls). Everything below is how each role does its part.

How denials enter the practice and how they are triaged

Denials arrive in three places, and all three need a daily owner. The 835 electronic remittance carries adjudicated denials as zero-pay or reduced-pay lines with a claim adjustment reason code (CARC) and often a remittance advice remark code (RARC). The clearinghouse report carries rejections, claims that never reached adjudication, with a claim status category code (A3 or A7) and a status code. Paper remittances from small payers, workers' compensation and auto carriers arrive by mail and must be keyed. If a practice only works the first source, which is common because the practice management system shows it automatically, a third of its problems are invisible.

Triage is the step most practices skip. Each denial gets four labels before anyone works it: the CARC and RARC, the root-cause category, the owning role, and the deadline. The categories we use are registration and eligibility (CO-16 with patient identifier remarks, CO-27, CO-31, CO-140, CO-22, CO-109), authorization and referral (CO-197, CO-198, CO-15), coding and documentation (CO-11, CO-4, CO-50, CO-97, CO-236, CO-151), billing office (CO-18, CO-29, CO-B7, CO-252), contract and payer (CO-45 variances, CO-242, underpayments) and patient responsibility (PR-1, PR-2, PR-3, PR-204), which is not a denial at all but is often mislabelled as one. The work queue needs these as columns, sortable, with the dollar amount and the appeal deadline. A spreadsheet is fine for a small practice; a queue that cannot be sorted by owner is not. The denial codes tool maps each CARC to its usual category and first action.

The front desk: registration, eligibility and referrals

The front desk owns the largest single group of preventable denials, and almost never sees them. Their denials are the ones that say the payer did not recognize the patient (CO-16 with N382 or MA61), coverage was not active (CO-27 for terminated, CO-31 for patient not found), another payer is primary (CO-22, CO-109), or the plan needed a referral that was not on file (CO-15, CO-183). The front desk's steps are all about the day before and the day of the visit.

1. Run eligibility 48 hours ahead for every scheduled patient and work the exception list: inactive, not found, different payer, or a plan that requires a primary care referral. Call those patients before they arrive.
2. At check-in, scan the card front and back and compare the member ID character by character with what is in the system. Confirm the subscriber's name and date of birth for dependents.
3. Ask the two coordination-of-benefits questions at every visit: is there any other insurance, and has anything changed with your coverage? Record the answer with the date.
4. Confirm the referral for HMO patients before the visit begins: referring physician, authorization number, number of visits, expiration date, entered on the appointment.
5. Collect the copay shown on the eligibility response and give the patient a written estimate of anything else they will owe.
6. Work the eligibility denial feedback once a week: the billing team sends the list of registration and eligibility denials from the prior week, and the front desk lead reviews each one against what was done at check-in.

Step six is the one that makes the others stick. A front desk that never sees its denials cannot improve, and a front desk that sees them every week usually fixes the pattern within a month.

Clinical staff: authorizations, orders and documentation support

Nurses, medical assistants and referral coordinators own the authorization denials (CO-197 precertification absent, CO-198 authorization exceeded) and a share of the medical necessity denials, because they gather the clinical information the payer needs before a service and the records the appeal needs after a denial.

1. Check the authorization requirement when the order is placed, not when the appointment is booked: payer, CPT code, place of service. Keep a one-page grid of the practice's top 20 services by payer and whether each needs approval, and update it when a payer changes its list. Our prior authorization lookup is a starting point for that grid.
2. Submit the request with the clinical criteria the payer publishes, not just the order: conservative treatment tried and failed, imaging results, duration of symptoms. Half of the authorization denials we see were denied for missing clinicals, not for the service itself.
3. Record the approval completely on the appointment: authorization number, approved CPT codes, units or visits, start and end dates. A number alone is not enough.
4. Flag changes before the service: if the surgeon changes the planned procedure, or the therapist needs more visits, the authorization is updated before the claim is created, not after the denial.
5. Pull records for appeals within two business days of the billing team's request, and include everything the appeal letter cites: the note, the order, the results, the failed-treatment history.
6. Schedule peer-to-peer calls when a payer's medical director denies on necessity; the clinical staff arrange the time and have the chart open for the physician.

The billing team: intake, correction, appeal and tracking

The billing team runs the process. They own the denials caused in the billing office (CO-18 duplicate, CO-29 timely filing, CO-B7 provider not enrolled, CO-252 attachment required) and they are the first touch on every denial regardless of cause.

1. Post every remittance the day it arrives and make sure every zero-pay and reduced-pay line creates a work queue item automatically. Check the clearinghouse rejection report every morning and treat rejections as same-day work.
2. Triage within 48 hours: assign CARC, RARC, category, owner and deadline. The deadline is the shorter of the payer's appeal window and the timely filing limit for a corrected claim.
3. Route by owner: send registration and eligibility denials to the front desk list, authorization denials to the clinical list, coding and documentation denials to the coder or provider, and keep billing-office denials.
4. Correct what is correctable the same week: a corrected claim (frequency code 7 with the original claim number) for a wrong modifier, a missing seventh character, a unit error, a wrong place of service. Never resubmit an unchanged claim; that produces CO-18 and resets nothing.
5. Appeal what deserves appeal: medical necessity, authorization disputes where the service was approved under a different code, bundling edits the payer applied incorrectly, timely filing denials where the practice has proof of earlier submission. Use a template per denial type, attach what the template says, and log the date sent and the method.
6. Follow up on every appeal at 30 days if no response, by portal or phone, and record the reference number. Escalate to a second level or the state insurance regulator's complaint process when the payer is silent past its own deadline.
7. Write off only with a reason code and approval: the write-off log needs a category (timely filing, no authorization, non-covered, small balance, bad debt) and a manager's initials for anything over a set dollar amount. Timely filing write-offs go on the manager's monthly report by name.

Two billing habits matter more than any template. First, work denials by dollar and deadline, not by arrival date; a $1,400 surgery denial with 20 days left outranks forty $22 lab denials. Second, finish each touch with a documented next action and date. A queue full of items marked "called payer, pending" is not a process.

The provider: documentation, code selection and appeals that need a physician

Providers own the denials that only a clinician can fix: medical necessity (CO-50), diagnosis not supporting the procedure (CO-11), level of service not supported after a records review, and anything that requires a peer-to-peer conversation. They also own the signatures, which sounds trivial until an unsigned note sinks an appeal.

1. Close and sign every encounter within 48 hours. A late-signed note is challenged in audits, and an unsigned one is treated as no documentation.
2. Document the why, not just the what: the indication for the procedure, the conservative treatment that failed, the clinical reasoning behind the level of service. Payers' medical policies list the criteria; the note should answer them in plain words.
3. Answer coder queries within two business days and treat them as part of the job, not an interruption. A query that sits for two weeks becomes a denial that sits for two months.
4. Review the practice's top denial reasons quarterly with the coder, especially unspecified diagnosis codes and modifier 25 patterns.
5. Write or sign the clinical paragraph of medical necessity appeals and take the peer-to-peer calls; a letter signed by a biller carries less weight with a medical director than two paragraphs from the treating physician.

The practice manager: reporting, escalation and prevention

The manager owns the process itself: whether denials are being counted, whether each role is doing its steps, and whether the practice is talking to payers about patterns rather than one claim at a time.

1. Produce the monthly denial report: count and dollars by CARC, by category, by payer and by owning role, with the trend against the prior three months.
2. Run a 30-minute root-cause meeting with one person from each role. Take the top five denial reasons by dollars, agree one upstream change for each, name an owner, and set the number that will show it worked.
3. Escalate payer patterns: when one payer denies a code it approved under authorization, or applies an edit that contradicts its own policy, that goes to the provider representative in writing with claim examples, not into fifty individual appeals.
4. Review the write-off log and sign off on anything over the threshold. Ask why for every timely filing write-off; the answer is always a process gap.
5. Check the contract when CO-45 adjustments look large: an underpayment against the fee schedule is a denial in disguise. The contract rate benchmark helps spot allowed amounts that are out of line.
6. Keep the enrollment calendar: CO-B7 denials (provider not eligible on the date of service) come from lapsed revalidations and new providers seeing patients before the payer effective date.

The hand-off table

Denial type (typical codes)	Detected by	First owner	Hands off to	Deadline for first action	Output
Patient not identified, coverage terminated, other payer primary (CO-16 with N382, CO-27, CO-31, CO-22)	Billing, from the 835 or rejection report	Billing (triage)	Front desk to verify coverage and update registration	48 hours	Corrected claim or claim to the correct payer
Referral or authorization missing or exceeded (CO-15, CO-197, CO-198)	Billing	Clinical staff	Provider if a peer-to-peer or retro-authorization is needed	5 business days (retro-auth windows are short)	Retro-authorization and corrected claim, or appeal with clinicals
Diagnosis inconsistent, modifier inconsistent, bundled (CO-11, CO-4, CO-97, CO-236)	Billing	Coder	Provider by query if the note needs clarification or addendum	5 business days	Corrected claim or appeal citing the NCCI policy
Not medically necessary (CO-50, CO-167)	Billing	Provider	Clinical staff to assemble records	10 business days	Written appeal with physician letter and records
Duplicate, timely filing, provider not enrolled (CO-18, CO-29, CO-B7)	Billing	Billing	Manager for enrollment issues and write-off approval	48 hours	Proof-of-timely-filing appeal, enrollment fix, or documented write-off
Underpayment against contract (CO-45 variance)	Billing, from the posting variance report	Billing	Manager for payer escalation	30 days	Reprocessing request with contract page attached
Patient responsibility (PR-1, PR-2, PR-3)	Billing	Billing	Front desk if the amount should have been collected at the visit	7 days	Patient statement, and a note on the time-of-service collection report

What good looks like

These are the targets we use when we take over a denial process, and the ranges we see in practices that have one. Initial denial rate (denied claims divided by claims submitted, measured monthly) under 5 percent for a well-run primary care practice and under 8 percent for procedural specialties; industry surveys commonly put the average well above that, which is the opportunity. Every denial triaged within 48 hours and first action taken within 7 days. At least 85 percent of denials appealed or corrected rather than written off, and an overturn rate on appeals above 60 percent; a low overturn rate means the team is appealing the wrong things, a very high one means payers are denying things they should have paid and the manager should be escalating. Timely filing write-offs at zero dollars, every month, because every one of them is a process failure. And the top five denial reasons by dollars should change over the year as each one is fixed; if the same five sit at the top for twelve months, the root-cause meeting is not working.

One more number: the share of denials owned by the front desk and clinical staff. In a practice that has never run this process, half or more of the denials trace back to registration, eligibility and authorization. In a practice that has run it for a year, that share falls sharply and the remaining denials are the harder coding and necessity disputes that belong with the coder and the provider. That shift is the clearest sign the process is doing what it should.

Appeal deadlines the billing team must know

Appeal windows differ by payer, and the process has to carry the right one on every work item. For Original Medicare, the first level is a redetermination by the Medicare Administrative Contractor, which must be requested within 120 days of receiving the initial determination; the second level is a reconsideration by the Qualified Independent Contractor within 180 days of the redetermination decision; the third is a hearing before an administrative law judge within 60 days, with a minimum amount in controversy that CMS adjusts each year and publishes on its appeals pages. For Medicare Advantage, a non-contracted provider has 60 days from the remittance to request a reconsideration and must include a signed waiver of liability. For commercial payers, the window is in the provider manual or the contract and commonly runs between 60 and 180 days from the denial date. Medicaid programs and their managed care plans set their own, often shorter. Put the specific window for each of your top ten payers on one page and pin it above the denial desk; our denial management service keeps that page as a living document for the practices we work with.

Questions we hear

What is the difference between denial management and denial prevention?

Denial management is the work after the denial: triage, correction, appeal, write-off. Denial prevention is changing the upstream step so the denial does not happen again. A practice can do the first without the second, and most do, which is why their denial volume never falls. The monthly root-cause meeting is where management becomes prevention; without it, the billing team is bailing a boat with a hole in it.

Should we appeal every denial?

No. Appeal the ones where the practice is right and the dollars justify the time: medical necessity denials with supporting documentation, authorization disputes where approval exists, incorrect bundling edits, and timely filing denials where proof of earlier submission exists. Correct rather than appeal when the practice made the error. Write off, with a documented reason, when the service genuinely is not covered or the balance is below the cost of the work. The judgment call should be made at triage, not after an hour of effort.

How do we prove timely filing when the payer says the claim was never received?

With the clearinghouse acceptance report showing the claim's acceptance by that payer (the 277CA with an A1 or A2 status and the payer's claim control number), or the payer portal's own submission history. A practice management system's "sent" date is not proof; it only shows the claim left your system. This is why rejections must be worked daily: a claim rejected at the clearinghouse and never resubmitted has no acceptance record and no defense.

Who should run the denial process in a small practice with one biller?

The biller runs intake and billing-office denials; the practice manager or owner runs the monthly report and the root-cause meeting; and the front desk and clinical staff still own their lists even if those lists are short. The structure matters more than headcount. A one-biller practice that routes denials by owner will outperform a three-biller practice where everything stays in the billing office.

How quickly should denial volume fall once the process is in place?

It depends on where the denials come from. Registration and eligibility denials usually respond within one to two months once the front desk sees its weekly list and runs eligibility ahead of visits. Authorization denials take a quarter, because the grid of requirements has to be built and the ordering workflow changed. Coding and necessity denials move slowest, because they depend on documentation habits. We tell practices to expect the overall rate to improve over two to three quarters, and to judge the process by whether the top reasons change, not only by the total.

Sources and references

• Claim Adjustment Reason Codes, X12: the official CARC list with current descriptions, start and stop dates and usage notes for every code on an 835.
• Remittance Advice Remark Codes, X12: the RARC list that explains the detail behind a CARC, including the N and MA codes that identify what was missing.
• Claim Status Category Codes, X12: the A1 to A8 and related category codes used on the 277CA to tell an accepted claim from a rejected one.
• Original Medicare (Fee-for-Service) Appeals, CMS: the five appeal levels for Medicare claims, with links to each level's instructions, forms and the current amount in controversy.
• First Level of Appeal: Redetermination by a Medicare Contractor, CMS: how to request a redetermination, the 120-day filing limit and what to include.
• Medicare Managed Care Appeals & Grievances, CMS: the appeal process for Medicare Advantage plans, including the rights of non-contracted providers.
• Medicare Claims Processing Manual (Publication 100-04), CMS: Chapter 29 covers appeals of claims decisions; Chapter 1 covers timely filing and corrected claims.