Centene Corporation owns a network of plan-specific subsidiaries — Ambetter (ACA marketplace), Wellcare (Medicare Advantage and PDP), Superior HealthPlan (Texas Medicaid), Magnitude (Exchange), and the legacy Health Net commercial products in California — and the published appeals framework varies by subsidiary. The corporate-level appeals address at PO Box 2560, Farmington, MO 63640-2560 and the published member-services line at 1-877-687-1182 are the corporate-published channels, and the same federal frameworks that apply to any other ACA / Medicare / Medicaid plan apply on the appeal — the ACA Nondiscrimination rule at 45 C.F.R. § 147.136 for ACA marketplace plans, the Medicare appeals framework under 42 C.F.R. § 422 for Medicare Advantage, the Medicaid managed-care contract framework for state-contract Medicaid plans, and the ERISA § 503 procedure at 29 C.F.R. § 2560.503-1 for self-funded employer plans.
01 · What this carrier looks like
Centene is the largest Medicaid managed-care insurer in the United States and the second-largest ACA marketplace insurer by enrollment, with subsidiaries that include Ambetter (marketplace), Wellcare (Medicare Advantage and PDP), Superior HealthPlan (Texas Medicaid), and Magnitude (Exchange). Each subsidiary has plan-specific clinical criteria and a plan-specific member portal — the published Member Appeals address at PO Box 2560, Farmington, MO 63640-2560 is the corporate routing address for the offline mail-in route, and the published member-services line at 1-877-687-1182 routes the enrollee to the right subsidiary call center. Each subsidiary has its own portal — ambetter.com, wellcare.com, superiorhealthplan.com, magnitude.com — that the appeal packet targets.
Centene appeals on the federal-framework side run through four channels depending on the subsidiary and plan type. ACA marketplace plans (Ambetter, Magnitude) operate under the Nondiscrimination obligation at 45 C.F.R. § 147.136 with the four-month external-review window at (d). Medicare Advantage Wellcare plans operate under the Medicare appeals framework at 42 C.F.R. § 422 with the 60-day reconsideration deadline and the Administrative Law Judge (ALJ) hearing on the second-stage level. State-contract Medicaid managed-care plans (Superior in TX, multiple Centene-managed Medicaid plans in CA, FL, and other states) operate under the controlling state Medicaid appeal contract — California's Medi-Cal State Fair Hearing under Welfare & Institutions Code § 10950 within 90 days, Texas Medicaid under the state's HHS appeal framework — and the federal Medicaid managed-care appeals at 42 C.F.R. § 431 Subpart E for fair-hearing rights. Self-funded ERISA group plans through Centene subsidiaries run through 29 C.F.R. § 2560.503-1 with the 180-day internal-appeal window.
A well-built Centene appeal letter names the subsidiary (Ambetter, Wellcare, Superior, Magnitude), cites the controlling federal framework — 45 C.F.R. § 147.136 for ACA, 42 C.F.R. § 422 for Medicare Advantage, the state Medicaid appeal contract for state-contract Medicaid, or 29 C.F.R. § 2560.503-1 for self-funded ERISA — attaches the EOB-side documentation, and frames the request to reach the right subsidiary. The letter branches on whether the controlling review window is the four-month ACA, the 60-day Medicare reconsideration, the 90-day State Fair Hearing for Medicaid, or the 180-day ERISA / 72-hour expedited urgent-claim. Centene-specific EOB reason codes are typically 'precertification not obtained,' 'criteria not met,' or 'out-of-network provider' — the same shape that attaches on any major-market ACA or Medicaid plan.
01 · The three Centene denial shapes we see most
Ambetter ACA marketplace denial on a precertification defect
An Ambetter plan denial letter cites 'precertification not obtained' or 'criteria not met' on the requested service, drug, or device — the prior-auth defect is procedural on the Ambetter clinical-criteria framework, the underlying clinical record is still on file, and the appeal attaches the prior-auth reference number, the referring-physician's order, and the documentation that was already on the clinical record at the time of the Ambetter Adverse Benefit Determination. The appeal frames the precertification defect as the eligible waiver basis, cites 45 C.F.R. § 147.136 for the ACA framework, and asks for reprocessing at in-network cost-share on the existing clinical record.
Wellcare Medicare Advantage denial on a step-therapy exception
A Wellcare Medicare Advantage denial letter cites 'step-therapy criteria not satisfied' or 'criteria not met' on the prescribed drug — the documentation in the clinical record shows prior failure on the Medicare Part D formulary-preferred step or a clinical contraindication, and the appeal attaches the prior-failure documentation, frames the step-therapy exception under the Medicare appeals framework at 42 C.F.R. § 422, and asks for a one-time formulary exception with the 60-day reconsideration window attaching on the first-stage level.
Superior HealthPlan TX Medicaid denial on a covered service
A Superior HealthPlan Texas Medicaid enrollee whose plan has denied a covered Medicaid service on 'medical necessity' or 'precertification not obtained' grounds. The Texas Medicaid managed-care framework supplies the appeal pathway — the controlling state HHS appeal framework, the parallel State Fair Hearing under the Texas Medicaid contract, and the 42 C.F.R. § 431 Subpart E fair-hearing rights — and the appeal attaches the Superior's clinical-review documentation, frames the request under the Medicaid contract framework, and asks for reprocessing on the published controlling federal / state framework.
01 · What this carrier looks like
Member portal·plan-specific member portal
Corporate Member Appeals·PO Box 2560, Farmington, MO 63640-2560
Member services·1-877-687-1182
Sign in to your plan-specific member portal (Ambetter / Wellcare / Superior) and use the secure-message inbox to attach the appeal.
02 · Frequently asked
Three questions a Centene member (Ambetter / Wellcare / Superior / Magnitude enrollee) typically has before drafting the appeal — with the corporate Member Appeals address, the plan-specific portal, and the controlling federal or state regime attached to each answer.
03 · Submit the Centene denial
Upload the most recent Centene / Ambetter / Wellcare / Superior denial letter or EOB, answer the four short intake questions, and Denvow picks the ACA Nondiscrimination rule under 45 C.F.R. § 147.136, the Medicare framework under 42 C.F.R. § 422, the Medicaid contract framework, or the ERISA § 503 procedure — and the letter branches on whether you're at the first-stage internal appeal or the four-month / 60-day / 90-day second-stage channel.
Already in the intake? Type “Centene” or “Ambetter” or “Wellcare” in the Insurer field on the form — the channel lookup keys off the typed name and the corporate Member Appeals address at PO Box 2560, Farmington, MO 63640-2560 plus the plan-specific portal are the published channels. Answer the rest of the four questions and submit.
03 · Submit the Centene denial
Denvow is template-and-tooling, not legal counsel. For denials that genuinely need litigation, an ERISA fiduciary complaint, or a state-court remedy, we recommend a licensed attorney in the relevant jurisdiction — and will say so when we see one.
Looking for state-specific guidance? Read the Georgia denial guide →·Read the New Jersey denial guide →