Appeal — TEST-CLAIM-00027

Date: [Letter Preparation Date]

Via: [Submission Method]

Synthetic Cigna
Appeals and Grievances Department
[Payer Address]

Re: Formal Appeal of Claim Denial
Claim Number: TEST-CLAIM-00027
Internal Claim ID: 7c9c1335-9235-44ca-9c7f-192655db1de8
Payer: Synthetic Cigna
Service Date: 2026-02-08
Denial Date: 2026-04-21
Denied Amount: $550.09
Procedure Codes: CPT 43065, CPT 20735
Diagnosis Codes: M17.95, G43.06
Appeal Deadline: 2026-08-19

Dear Synthetic Cigna Appeals Department,

This letter constitutes a formal first-level appeal on behalf of the treating facility against the denial of Claim TEST-CLAIM-00027, issued on April 21, 2026, under denial code CO-197 (Precertification/Authorization/Notification Absent). The facility respectfully requests that Synthetic Cigna overturn this denial, reprocess the claim in full, and remit payment of the denied amount of $550.09.

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I. STATEMENT OF DENIAL AND BASIS FOR APPEAL

Synthetic Cigna denied a portion of the above-referenced claim — specifically $550.09 of the $972.94 total billed — asserting under CO-197 that precertification or prior authorization was absent for the services rendered on February 8, 2026. Those services include CPT 43065 (upper gastrointestinal endoscopy with biopsy) and CPT 20735 (arthrocentesis/aspiration of a joint), provided in connection with diagnoses M17.95 (osteoarthritis, unspecified, unilateral, unspecified leg) and G43.06 (persistent migraine aura without cerebral infarction, not intractable, without status migrainosus).

The facility contests this denial in its entirety. The factual premise of the CO-197 denial is incorrect: prior authorization was obtained from Synthetic Cigna in advance of the February 8, 2026 service date. The enclosed supporting documentation directly contradicts the assertion that authorization was absent and demonstrates full compliance with Synthetic Cigna's precertification requirements.

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II. SUPPORTING EVIDENCE

The following documents are enclosed with this appeal and are incorporated herein by reference:

1. Prior Authorization Approval Letter from Cigna — This document confirms that Synthetic Cigna issued authorization for the relevant procedures prior to the service date of February 8, 2026. The existence of this approval letter directly refutes the CO-197 denial code, which asserts that no authorization was obtained.

2. Precertification Request Documentation with Submission Date and Confirmation — This documentation establishes the timeline of the facility's authorization request, demonstrating that the precertification request was submitted to Synthetic Cigna prior to the date of service and that a confirmation of submission was received. This record shows that the facility fulfilled its obligation to seek authorization in a timely and compliant manner.

3. Proof of Timely Submission to Payer (Fax Confirmation or Electronic Submission Records) — This evidence corroborates the submission date of the precertification request and confirms that Synthetic Cigna received the request within the required timeframe.

4. Cigna's Authorization Request Requirements Checklist with Evidence of Compliance — This document demonstrates that the facility's precertification submission met all of Synthetic Cigna's stated requirements at the time of the request.

5. Operative Report for CPT 43065 — This report documents the clinical performance of the upper gastrointestinal endoscopy with biopsy and supports the medical necessity of the procedure.

6. Clinical Notes Demonstrating Medical Necessity for CPT 20735 — These notes support the clinical indication for joint aspiration in the context of the patient's documented diagnoses.

7. Letter of Medical Necessity — The enclosed letter of medical necessity provides additional clinical context affirming that both procedures were medically required and appropriate for the patient's conditions as of the service date.

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III. POLICY ANALYSIS AND GROUNDS FOR REVERSAL

Synthetic Cigna's prior authorization policy requires that covered procedures receive precertification prior to the date of service. The facility does not dispute this requirement. However, the CO-197 denial is predicated on the erroneous finding that such authorization was not obtained. As the enclosed prior authorization approval letter and precertification request documentation clearly demonstrate, authorization was in fact secured before services were rendered on February 8, 2026.

Where a payer has issued an authorization approval and that approval predates the service date, a subsequent denial under CO-197 is factually unsupported and inconsistent with the payer's own authorization records. The facility submits that Synthetic Cigna's internal records, when reviewed, will confirm the issuance of the authorization referenced in the enclosed documents.

In the alternative, should Synthetic Cigna's review identify any procedural gap in the authorization record, the facility respectfully notes that both CPT 43065 and CPT 20735 may qualify for consideration under Synthetic Cigna's urgent or emergent care authorization exemptions, depending on the clinical circumstances documented in the enclosed operative report and clinical notes. The enclosed letter of medical necessity addresses this point in further detail.

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IV. REQUESTED REMEDY

The facility respectfully requests that Synthetic Cigna:

1. Conduct a thorough review of its internal authorization records in conjunction with the enclosed precertification approval letter and submission documentation;
2. Overturn the CO-197 denial for Claim TEST-CLAIM-00027 in its entirety;
3. Reprocess the claim for CPT 43065 and CPT 20735 under diagnoses M17.95 and G43.06, consistent with the terms of coverage; and
4. Remit payment of the denied amount of $550.09 to the facility.

This appeal is submitted within the applicable appeal deadline of August 19, 2026. The facility respectfully requests written acknowledgment of receipt of this appeal and a determination within the timeframe required by applicable regulations and plan terms.

Should additional information be required to resolve this matter, please contact the facility's billing and appeals department at the contact information below.

Respectfully submitted,

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

Enclosures:
- Prior Authorization Approval Letter from Cigna
- Precertification Request Documentation with Submission Date and Confirmation
- Proof of Timely Submission to Payer
- Cigna Authorization Request Requirements Checklist with Evidence of Compliance
- Operative Report for CPT 43065
- Clinical Notes for CPT 20735
- Letter of Medical Necessity