Overview
When a health insurance company denies coverage, reduces payment, or refuses authorization for care, Indiana residents generally have the right to challenge that decision through an internal grievance or appeal process.
The exact process depends on the type of plan (commercial, Marketplace, employer self-funded, Medicare Advantage, or Indiana Medicaid managed care), but most follow a similar two-step structure:
- Grievance — initial complaint or dispute
- Appeal — formal review of an adverse decision
Not sure which rules apply to you? Start with Indiana: Start Here to confirm plan type and regulator.
Grievance vs. Appeal in Indiana
In Indiana insurance law and Department of Insurance guidance:
- A grievance is typically the first internal complaint process.
- An appeal is the request to review a grievance decision or adverse benefit determination.
Insurers may use different terminology, including:
- Internal appeal
- Reconsideration
- Adverse benefit determination review
- Complaint resolution
Always follow the terminology and instructions in your denial letter or Explanation of Benefits (EOB), since those control deadlines.
Indiana Internal Appeals and Grievances by Plan Type
When a health insurance company denies coverage, reduces payment, refuses prior authorization, delays care, or mishandles a claim, the member may have the right to challenge that decision through an internal grievance or appeal process. The exact process depends on the type of plan. A fully insured Indiana plan, Marketplace plan, employer self-funded plan, Medicare Advantage plan, and Indiana Medicaid managed care plan may use similar words, but they do not always follow the same rules.
The first step is to identify the plan type. Then read the denial letter carefully. The denial letter usually tells the member what kind of review is available, where to send the appeal, what deadline applies, and whether expedited review is available.
Fully Insured Indiana Commercial Plans
For many fully insured Indiana commercial plans, the process often starts with a grievance. A grievance is the member's complaint or dispute with the plan. If the grievance does not fix the problem, the member may then request an internal appeal, which is a higher-level review of the plan's decision.
Indiana treats this process as more than optional paperwork. The plan must acknowledge the filing, investigate the issue, keep records, and notify the member of the result and any further appeal rights. The main administrative rule is 760 IAC 1-59-6. For insurers, Indiana Code § 27-8-28-16 generally requires grievance acknowledgment within five business days and requires the insurer to document, investigate, and resolve the grievance in a timely way.
The timing rules are important. Under 760 IAC 1-59-10, an insurer generally must resolve a grievance within 20 business days after receiving the information reasonably necessary to complete the review, and must send written notice within five business days after the grievance is resolved.
If the grievance decision is unfavorable, the member can usually request an internal appeal. Indiana Code § 27-8-28-17 requires insurers to acknowledge appeals within five business days, investigate the appeal, and send a written decision explaining the result and any further remedies available. Medical disputes should be reviewed by people with relevant clinical expertise who were not involved in the original decision. For many standard appeals of grievance decisions, the appeal must be resolved as quickly as the clinical urgency requires and no later than 45 days after filing.
Indiana HMOs
Indiana HMOs follow a similar grievance-and-appeal structure, but some deadlines are slightly different. For HMOs, Indiana Code § 27-13-10-7 generally requires the HMO to acknowledge a grievance within three business days, investigate it, document the actions taken, and notify the enrollee of the outcome and appeal rights.
Under 760 IAC 1-59-10, an HMO generally must resolve a grievance within 20 business days after the grievance is filed, and must send written notice within five business days after resolution. If the member appeals the grievance decision, the HMO generally must acknowledge the appeal within three business days and resolve it within 45 business days after the appeal is filed.
The related HMO appeal statute is Indiana Code § 27-13-10-8. If the appeal involves a health care procedure, treatment, or service, 760 IAC 1-59-12 describes the appeal panel requirements, including review by people who were not involved in the original decision.
Marketplace Plans
Marketplace plans are usually subject to federal Affordable Care Act internal appeal rules. For many Marketplace denials, the member generally has 180 calendar days from receiving the denial notice to file an internal appeal (healthcare.gov — internal appeals).
The denial letter should be treated as the roadmap. It should explain why the claim, service, or authorization was denied and how to file the appeal. If the situation is urgent, the member can ask for expedited review. In urgent cases, the member may also be able to request external review at the same time as the internal appeal.
Because Marketplace plans may also be fully insured by an Indiana-regulated insurer, advocates should check both the denial letter and the plan type. The Indiana grievance rules may be relevant, but the 180-day federal appeal deadline is often the key filing deadline for an adverse benefit determination.
Employer Self-Funded Plans
Employer self-funded plans are usually governed by federal ERISA rules rather than Indiana insurance grievance statutes. These plans are often administered by familiar insurance companies, but the insurance company may only be acting as the claims administrator. That means Indiana insurance rules may not control the appeal process in the same way they would for a fully insured plan.
For these plans, the most important documents are the denial letter, the Summary Plan Description, and the plan's claims and appeals procedures. Many employer health plans give the member 180 days to appeal a denied health benefit claim, but advocates should confirm the exact deadline in the denial letter and plan documents.
If the member is unsure whether the plan is self-funded, ask the employer's benefits office or plan administrator. Do not assume that a plan is fully insured just because the card says Anthem, UnitedHealthcare, Cigna, Aetna, or another major insurer.
Indiana Medicaid Managed Care
Indiana Medicaid managed care plans use a different appeal structure. This includes programs such as the Healthy Indiana Plan, Hoosier Healthwise, Hoosier Care Connect, and Indiana PathWays for Aging. If the issue involves a health plan's decision about care, coverage, prior authorization, reduction, termination, or payment, the member generally must start with the managed care entity's appeal process.
Indiana Medicaid guidance states that managed care members generally have 60 calendar days from the date of the action notice to file an appeal with the managed care plan, consistent with 42 CFR § 438.402. Indiana's Medicaid member appeals page also explains that members in Healthy Indiana Plan, Hoosier Healthwise, or Hoosier Care Connect should contact their health plan and work through the plan's appeal process for healthcare-related actions (in.gov — member appeals).
Continuation of benefits is especially important in Medicaid cases. If the plan is reducing, suspending, or terminating a service the member is already receiving, the member should ask immediately whether benefits can continue during the appeal. Under 42 CFR § 438.420, continuation of benefits generally requires timely action, including filing for continuation within the required timeframe, often within 10 calendar days of the notice or before the effective date of the proposed change, whichever is later.
Medicare Advantage Plans
Medicare Advantage plans use their own Medicare appeal and grievance system. In Medicare, the distinction between a grievance and an appeal is usually clearer. A grievance is generally a complaint about quality of care, access problems, delays, customer service, or how the member was treated. An appeal is used when the member disagrees with a refusal to cover, pay for, or authorize a service, item, or supply.
For Medicare Advantage coverage denials, the first appeal is usually called a reconsideration. Medicare explains that Level 1 Medicare Advantage appeals are called health plan reconsiderations, and that a member can ask the plan to reconsider an unfavorable organization determination (medicare.gov — Medicare health plan appeals). HHS states that a Medicare Advantage member may request reconsideration within 60 days of being notified of the plan's initial decision (hhs.gov — Part C Level 1 appeals).
For grievances, CMS explains that a Medicare health plan grievance is an expression of dissatisfaction with the plan's operations, activities, or behavior, other than an organization determination. The grievance generally must be filed no later than 60 days after the event or incident (cms.gov — managed care grievances).
Practical Tips for Advocates
No matter the plan type, advocates should treat every grievance or appeal as both a medical argument and a deadline-driven record. Save the denial letter, note the date it was received, keep proof of filing, ask the plan for its grievance and appeal procedures in writing, and make sure the plan explains both the medical reason and the policy reason for the denial.
If waiting for the normal timeline could seriously harm the patient, ask for expedited review right away. If the member is on Medicaid and services are being reduced, suspended, or terminated, ask about continuation of benefits immediately. Not sure which rules apply? Start with Indiana: Start Here to confirm the plan type and regulator.
What to Include in an Appeal
A complete appeal packet should include:
- Member ID and claim/authorization number
- Copy of denial letter or EOB
- Clear written explanation of why the denial should be overturned
- Medical records supporting the request
- Physician letter of medical necessity
- Relevant clinical guidelines (if applicable)
- Proof of submission (fax receipt, portal confirmation, certified mail)
For medical necessity denials, the physician statement is often the most important document. See Building a strong appeal packet for a fuller checklist.
Major Indiana Insurers and Their Appeal Processes
Below are the major insurers in Indiana and how their internal appeal systems generally work. Deadlines and procedures can vary by product—always use your denial letter as the final word.
Anthem Blue Cross and Blue Shield
Anthem provides an internal appeal process for denied claims, prior authorizations, and coverage decisions. Members typically have up to 180 days to file appeals for commercial plans. Appeals can be submitted through the member portal, mail, or fax. Expedited appeals are available when delays could seriously impact health.
Appeals information: anthem.com/member-resources/claims-appeals
UnitedHealthcare
UnitedHealthcare allows members to appeal denied claims or services through its internal review system. Appeals can be submitted online, by phone, or in writing. Members generally have 180 days to file appeals for commercial plans.
Appeals information: uhc.com — appeals and grievances
Aetna
Aetna's internal appeal process applies to claim denials, authorization denials, and medical necessity disputes. Appeals may be submitted online, by mail, or through member services. Most plans allow up to 180 days for filing appeals.
Appeals information: aetna.com — complaints, grievances, and appeals
Cigna
Cigna offers an internal appeal process for denied services and claims. Members can submit appeals through secure online accounts or written submission. Expedited review is available for urgent medical needs.
Appeals information: cigna.com — appeals and grievances
Humana
Humana provides grievance and appeal procedures depending on plan type (commercial, Medicare, or Medicaid). Indiana Medicaid members typically have 60 days to appeal. Appeals may be submitted online, by phone, fax, or mail.
Appeals portal: resolutions.humana.com
CareSource
CareSource separates grievances (service complaints) from appeals (coverage disputes). Indiana Medicaid members generally have 60 days to file appeals. Appeals can be submitted via portal, fax, mail, or phone.
Appeals information: caresource.com — Indiana grievance and appeal · Marketplace appeals
Managed Health Services (MHS Indiana)
MHS (Centene) manages Indiana Medicaid and Ambetter Marketplace plans. Members may file grievances for service issues and appeals for denied benefits. Appeals can be submitted by mail, phone, or online portal.
Appeals information: mhsindiana.com — inquiries and appeals
Ambetter (MHS Indiana)
Ambetter members may appeal denied claims, prior authorizations, and coverage decisions. Most Marketplace plans allow up to 180 days to file an appeal. Appeals are typically submitted through the member portal or written request.
Appeals information: ambetterhealth.com — grievance and appeal process
Molina Healthcare
Molina provides grievance and appeal processes for coverage disputes and service complaints. Appeals can usually be submitted online, by mail, or through member services. Denial letters specify exact deadlines and expedited review rights.
Appeals information: molinahealthcare.com — grievance and appeals
Indiana Laws Governing Appeals and Grievances
These are the key Indiana and federal legal frameworks governing internal appeals:
Indiana Grievance Statute
- Indiana Code § 27-8-28-16 (timely grievance resolution requirements)
- Indiana Code Chapter 27-8-28 (grievance procedures framework)
HMO Regulation
- Indiana Code Article 27-13 (Health Maintenance Organizations)
- 760 IAC 1-59 (HMO grievance procedures)
Federal ACA Internal Appeals Rule
Applies to most fully insured Marketplace plans:
45 CFR § 147.136 — internal claims and appeals
ERISA Self-Funded Employer Plans
Employer-sponsored self-funded plans are governed by federal law, not Indiana's insurance grievance statutes. See Self-funded ERISA plans and:
External Review Rights
If the internal appeal is denied, many members may request an external independent review conducted by a third party not affiliated with the insurer.
Indiana Department of Insurance external review information: in.gov/idoi — file a complaint. For next steps on this site, see Indiana external review.
Key Takeaway
Indiana health insurance appeals are not one-size-fits-all. The applicable rules depend heavily on:
- Plan type (fully insured vs. self-funded)
- Coverage category (Marketplace, Medicaid, employer, Medicare Advantage)
- The specific denial language in the member's notice
The denial letter is always the controlling document for deadlines and procedures.