Appeal Templates and Resolution Kits

Before you write

• Pull the payer's LCD or medical policy for the exact CPT code. Cite it by number in the letter.
• Confirm the denial is truly CARC 50. If it is CARC 55 (procedure code not appropriate for age or gender), the root cause is often a coding error, verify the code before appealing.
• Request a peer-to-peer review from the payer's medical director in parallel with the written appeal. Peer-to-peer conversations resolve a meaningful share of medical necessity denials without a formal decision letter.

What to include

• Physician narrative that maps line-by-line to the LCD/NCD criteria, generic letters rarely succeed.
• Peer-reviewed literature or specialty society guidelines when the LCD is out of date with current clinical practice.
• Complete medical records, physician letter of medical necessity, diagnostic results, operative report if applicable.

Filing details

• Timely filing: Most commercial payers require appeals within 180 days of the denial. Medicare Advantage is 60 days for standard appeals.
• Escalation: If the first-level appeal is denied, escalate to an external independent review (state DOI process for commercial, IRE for MA plans).

Before you write

• Verify the service actually required prior authorization for this specific plan on the date of service. Payer requirements change and often carve out emergencies, urgent care, and certain in-network settings.
• Determine whether a retroactive authorization is available. Most commercial payers allow retro-auth requests within 30 to 90 days when the service was medically justified.
• If the service was emergent, urgent, or medically necessary during a non-business window, cite the plan's own emergency exception language, most plans have one.

What to include

• Documentation showing why prior auth was not obtained (emergency, urgent, patient in active treatment, physician office closed, payer portal outage).
• Clinical records supporting medical necessity, same standard as a medical necessity appeal.
• The payer's own retroactive authorization or emergency exception policy, cited by section.

Filing details

• Timely filing: Retro-auth requests usually have a shorter window than appeals, verify each payer's cutoff.
• Escalation: If the retro-auth is denied and the service was medically justified, file a formal appeal citing the retro-auth denial as evidence the payer refused to consider the merit.

Before you write

• Confirm the payer's actual filing deadline for this plan. Deadlines vary widely: Medicare 12 months, Aetna 120 days, Cigna 90 days (par) or 180 days (non-par), most BCBS 180 days.
• Pull the strongest proof of timely submission you have: 999 or 277CA acknowledgment, clearinghouse submission log, payer portal confirmation, or certified mail receipt.
• Check for exceptions that reset the clock: retroactive eligibility, coordination of benefits delay, declared emergency waiver, or payer administrative error.

What to include

• The strongest timestamp evidence available, ideally an electronic acknowledgment with the exact submission date and time.
• Documentation of any qualifying exception, cited to the payer's own policy or (for Medicare) 42 CFR § 424.44(b).
• A clear timeline showing the date of service, the submission date, and the denial date, so the payer can verify at a glance.

Before you write

• Verify the modifier is appropriate for the clinical scenario. Modifier 25 requires a significant, separately identifiable E/M service. Modifier 59 (or the X-modifiers) requires a distinct procedural service, different session, site, or lesion.
• Confirm with the NCCI edit tables whether the code pair is bundled and, if so, whether an override modifier is allowed.
• Consider whether the denial is a coding-driven fix rather than an appeal. If the modifier was omitted or wrong, a corrected claim is usually faster than an appeal letter.

What to include

• Progress notes documenting the distinct nature of each service, separate sites, sessions, or clinical justifications.
• NCCI edit language showing the code pair is separately reportable when the modifier is used correctly.
• CPT Assistant references or specialty-society coding guidelines when payer interpretation conflicts with published guidance.

Before you write

• Verify the true primary payer with the patient and via a 270/271 eligibility inquiry. COB denials often trace back to outdated coverage information on file.
• If Medicare is involved, apply the Medicare Secondary Payer (MSP) hierarchy: working-aged, disability, ESRD, workers' compensation, no-fault, or veterans benefits each have specific rules.
• If the patient has confirmed only one plan is active, obtain a signed COB update or termination letter from the alleged primary and submit with the appeal.

What to include

• Eligibility verification (270/271 response) confirming the correct primary payer on the date of service.
• Documentation from the alleged primary payer stating the patient is not covered or the plan has terminated.
• For MSP cases: the specific MSP category and citation from CMS Pub. 100-05 Chapter 3 or 42 CFR § 411 subpart B.

Before you write

• Check whether the plan document actually excludes this service or whether the denial was a coverage-tier misclassification. Ask for the specific plan section that supports the exclusion.
• If the service was performed for a diagnostic indication (not screening), verify the ICD-10 code submitted actually reflects that. Diagnostic vs. screening is the most common cause of a preventable non-covered denial.
• For ACA-regulated plans, confirm whether the service is a preventive service required to be covered at no cost-sharing.

What to include

• The plan's own summary of benefits and coverage (SBC) or evidence of coverage (EOC) showing either coverage or, if truly excluded, the specific exclusion language for the payer to explain.
• Clinical documentation establishing diagnostic (not screening) indication if the denial was tier-driven.
• For preventive services: the ACA preventive services list and the USPSTF, HRSA, or ACIP guideline that supports coverage.

Before you write

• Re-verify the codes on the claim against the clinical documentation. Many coding-denial appeals fail because a coding correction was actually needed, not an argument that the payer is wrong.
• If a corrected claim will work faster than an appeal (and the timely-filing window allows), submit a corrected claim first.
• Check the payer's own coding policy manual, most publish payment policies that dictate how they interpret specific code combinations.

What to include

• The clinical documentation supporting each code as submitted, referenced by page and line.
• CPT Assistant citations or CMS coding guidance if there is a coding interpretation dispute.
• The payer's own coding policy if their denial contradicts their published guidance.