Appeal — TEST-CLAIM-00082

Date: [Date of Submission]

Synthetic Aetna
Appeals and Grievances Department
[Payer Address]

RE: Formal Appeal of Claim Denial
Claim Number: TEST-CLAIM-00082
Service Date: January 21, 2026
Denial Date: March 12, 2026
Denied Amount: $8,116.65
Denial Code: CO-198
Appeal Deadline: September 8, 2026

Dear Synthetic Aetna Appeals Department,

This letter constitutes a formal first-level appeal on behalf of our facility regarding the denial issued on March 12, 2026, for Claim Number TEST-CLAIM-00082. We respectfully request that Synthetic Aetna overturn the denial and reprocess this claim for full payment of the denied amount of $8,116.65.

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I. BACKGROUND AND DENIAL SUMMARY

On January 21, 2026, our facility rendered services for procedures CPT 86064 (immunology panel) and CPT 82655 (urine microalbumin) in connection with a diagnosis of R07.73 (chest pain). The total billed amount for this claim was $12,392.82. Synthetic Aetna subsequently issued a denial for $8,116.65 of that amount under denial code CO-198, asserting that the precertification/authorization was exceeded.

We respectfully contend that this denial is incorrect and unsupported by the documentation on file. As detailed below, the billed procedures either fall within the scope of the authorization as approved, or the payer's interpretation of the authorization's boundaries is inconsistent with the terms set forth in the original approval. We therefore request that Synthetic Aetna reverse this denial and issue payment for the full denied amount.

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II. BASIS FOR APPEAL

A. The Billed Procedures Are Within or Consistent With the Approved Authorization Scope

A prior authorization was obtained in advance of the January 21, 2026, date of service. The enclosed prior authorization approval letter and prior authorization request documentation confirm that authorization was granted prior to the rendering of services. It is our position that CPT 86064 and CPT 82655, as billed, fall within the scope of services contemplated and approved under that authorization.

Synthetic Aetna's application of CO-198 presupposes that the services rendered exceeded the terms of the approved precertification. However, a careful review of the enclosed itemized claim detail — which documents the service dates, procedure codes, and their direct linkage to the authorized episode of care — demonstrates that the billed procedures are consistent with the authorization as granted. The payer's interpretation of the authorization boundaries appears to be overly restrictive and not reflective of the authorization language itself.

We direct Synthetic Aetna's attention to the enclosed correspondence with the payer regarding authorization scope and limits, which further documents our good-faith efforts to clarify and confirm the extent of the approved services prior to and following the date of service.

B. Medical Necessity Is Established and Supports the Services as Rendered

Even if Synthetic Aetna maintains that the authorization limits were technically exceeded, the clinical record establishes that the services provided were medically necessary for the patient's presenting diagnosis of R07.73 (chest pain). The enclosed clinical justification documentation — including the lab requisition and associated clinical records — demonstrates a clear and reasonable clinical rationale for ordering both the immunology panel (CPT 86064) and the urine microalbumin assessment (CPT 82655) in the context of the patient's diagnosis and clinical presentation on the date of service.

Payer policy governing prior authorization scope and limits should not be applied in a manner that results in the denial of payment for services that are demonstrably medically necessary and that were rendered in reasonable reliance on an existing, valid authorization. Denial of medically necessary services on the basis of an authorization technicality, without regard to clinical necessity, is inconsistent with sound utilization management principles.

C. The Payer's Interpretation of Authorization Limits Is Subject to Challenge

Pursuant to Synthetic Aetna's prior authorization scope and limits policy, a provider who obtains a valid prior authorization is entitled to rely upon that authorization for the services encompassed within its approved scope. Where, as here, there is a reasonable basis to conclude that the billed procedures fall within or are consistent with the authorized services, denial under CO-198 is not appropriate.

Our facility acted in good faith, secured authorization in advance of the service date, and rendered services consistent with the patient's clinical needs and the terms of the authorization. The enclosed prior authorization approval letter and supporting documentation substantiate that the authorization was active and valid as of the date of service.

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III. SUPPORTING DOCUMENTATION ENCLOSED

In support of this appeal, please find the following documents enclosed:

1. Prior authorization approval letter
2. Prior authorization request documentation
3. Itemized claim detail showing service dates and procedure linkage
4. Correspondence with payer regarding authorization scope and limits
5. Clinical justification for procedures performed (lab requisition and associated clinical documentation)

We respectfully request that the reviewer consider all enclosed documentation in its entirety prior to rendering a determination on this appeal.

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IV. REQUESTED REMEDY

Based on the foregoing, we respectfully request that Synthetic Aetna:

1. Overturn the CO-198 denial issued on March 12, 2026, for Claim Number TEST-CLAIM-00082;
2. Reprocess the claim in full; and
3. Issue payment for the denied amount of $8,116.65 in accordance with the applicable contract terms and benefit provisions.

Should additional information be required to resolve this appeal, please contact our facility's billing and appeals department at your earliest convenience. We appreciate your prompt attention to this matter and look forward to a favorable resolution.

Respectfully submitted,

[Authorized Facility Representative Name]
[Title]
[Facility Name]
[Facility Address]
[Phone Number]
[Fax Number]
[Date]