How to appeal a Cigna continuous glucose monitors & insulin pumps denial

The framework that applies to your appeal

Federal law gives you the right to a full and fair internal appeal, then an external review by an independent third party.

Cigna-specific note: Sold its Medicaid Advantage book to HCSC in 2023. Express Scripts (PBM) is Cigna-owned. Frequent class-action litigation around mental health parity.

What Cigna's policy requires for continuous glucose monitors & insulin pumps

Cited policy: Cigna coverage policy - CGM / 0102 - External Insulin Pumps

rt-CGM/isCGM for insulin-treated diabetes; specific T2 non-insulin criteria (severe hypo history). Pumps require T1DM or insulin-requiring T2DM with documented poor control on MDI, plus C-peptide if T2.

How Cigna denies continuous glucose monitors & insulin pumps — and how to counter it

Where Cigna pushes back: 1) 'Not on insulin / not enough insulin injections per day'; 2) 'C-peptide not documented' (T2 pump); 3) 'Trial of MDI not adequate (less than 6 months)'; 4) 'Tandem Mobi too new / experimental smartphone control'.

Counter-arguments that hold up: Cigna MCP 0106 was updated to align with CMS expansion. C-peptide is CMS-derived: provide fasting C-peptide <=110% of lower limit with concurrent fasting glucose <=225 mg/dL, OR positive beta cell autoantibodies (GAD, IA-2, ZnT8). Tandem Mobi uses identical Control-IQ algorithm as t:slim X2 (Brown NEJM 2019); FDA cleared Jul 2023. ADA 2025 + ATTD 2023 do not require fixed MDI trial duration when hypoglycemia or DKA documented.

What Cigna typically denies for continuous glucose monitors & insulin pumps

Across Cigna's commercial and Medicare books, denials cluster around a small number of patterns. For continuous glucose monitors & insulin pumps, expect:

• Mental health parity violations
• Step therapy
• Specialty drug prior auth
• OON balance billing disputes

Treatments most often denied in this category

These are the continuous glucose monitors & insulin pumps treatments most often flagged for prior auth, step therapy, or medical necessity review:

• Dexcom G7
• Dexcom G6
• Libre 3 Plus
• Libre 2 Plus
• Eversense 365
• Tandem t:slim X2

How to submit the appeal to Cigna

1. Read the denial letter — note the exact denial reason code and the appeal deadline (180 days from the date on the letter).
2. Gather supporting documentation: physician letter of medical necessity, relevant clinical notes, peer-reviewed citations supporting the treatment for your indication, and the policy or coverage document Cigna cited in the denial.
3. File the appeal through Cigna's portal (members: https://my.cigna.com ; providers: https://cignaforhcp.cigna.com). Standard decision returns within 30 days; expedited urgent appeals return within 72 hours.
4. If denied again, request external review by an independent reviewer within 4 months of the final internal denial. In CT, the state insurance department coordinates external review for fully-insured plans; ERISA self-funded plans use a federal external review through DOL/EBSA.

Clinician or prior-auth team handling this on the practice side? See Cigna's prior-authorization criteria by drug: Cigna PA criteria on ApprovalHelp.