How Long Do You Have to Appeal a Denied Insurance Claim? State-by-State Guide

Time is the silent killer of insurance appeals. You can have the strongest clinical argument in the world, but if you miss the appeal deadline, that claim is gone — no exceptions, no extensions, no mercy. Understanding exactly how much time you have is one of the most important things you can do to protect your patients and your revenue.

The frustrating reality is that appeal deadlines vary significantly depending on the type of insurance, the state, and whether you're filing an internal appeal (to the insurer) or an external review (to an independent organization). Here's a complete breakdown.

Federal Baseline: ACA Appeal Rights

For most private insurance plans (employer-sponsored or individual plans subject to the ACA), federal law establishes minimum appeal standards under 29 CFR §2590.715-2719 and 45 CFR §147.136:

• Internal appeals: Plans must allow at least 180 days to file an internal appeal after receiving a denial notice.
• Urgent care appeals: For urgent/concurrent care, you have the right to an expedited internal appeal with a decision within 72 hours.
• External review: After exhausting internal appeals, you typically have 4 months (approximately 120 days) to request external review.
• Simultaneous internal and external: For urgent care denials involving medical necessity, you can pursue internal and external review simultaneously.

Medicare and Medicare Advantage

Medicare appeals follow a structured five-level process, each with its own timeline:

• Level 1 — Redetermination (MAC review): Must be filed within 120 days of receiving the initial determination.
• Level 2 — Reconsideration (Qualified Independent Contractor): Must be filed within 180 days of the MAC redetermination.
• Level 3 — Administrative Law Judge hearing: Must be requested within 60 days of QIC reconsideration.
• Level 4 — Medicare Appeals Council: Must be requested within 60 days of ALJ decision.
• Level 5 — Federal District Court: Must be filed within 60 days of Medicare Appeals Council decision.

For Medicare Advantage (Part C) plans, the first-level appeal (reconsideration) must be filed within 60 days of the denial. This is significantly shorter than traditional Medicare's 120-day window.

Medicaid

Medicaid appeal deadlines are set by each state and vary significantly. The federal minimum is 90 days from the notice of adverse action, but many states have shorter windows. Managed Medicaid plans (MCOs) may have their own internal timelines before state fair hearings.

State-by-State Guide: Key States

Below are the internal appeal deadlines for major states. These are the deadlines for filing with the insurer — external review and state fair hearing deadlines may differ.

California

• Internal appeal deadline: 180 days from denial (Individual Market/ACA plans)
• Independent Medical Review (external): 6 months from denial
• Notable: California's IMR process is one of the most consumer-friendly in the country. The California Department of Managed Health Care (DMHC) processes reviews quickly — average 30 days for standard, 3 days for urgent.
• Key law: California Health & Safety Code §1370

Texas

• Internal appeal deadline: 180 days (ACA minimum applies)
• Independent review: 4 months from final internal denial
• Expedited review: Available for urgent cases, decision within 3 days
• Key law: Texas Insurance Code Chapter 4201

New York

• Internal appeal deadline: 45 days from denial (this is shorter than the federal minimum for many NY-regulated plans)
• External review: 4 months from internal denial
• Notable: New York has a robust external appeal process — insurers must pay for external reviews that are decided in the patient's favor.
• Key law: New York Insurance Law §4802

Florida

• Internal appeal deadline: 365 days from denial for state-regulated plans (one of the most generous)
• External review: 4 months from final internal denial
• Key law: Florida Statutes §627.6131

Illinois

• Internal appeal deadline: 180 days (federal minimum)
• External review: 4 months from denial
• Key law: Illinois Insurance Code 215 ILCS 5/155.22

Pennsylvania

• Internal appeal deadline: 180 days for individual and small group plans
• External review: 4 months from final adverse determination
• Key law: Pennsylvania Act 68 of 1998

Ohio

• Internal appeal deadline: 180 days
• External review: 4 months
• Key law: Ohio Revised Code §3922.03

Georgia

• Internal appeal deadline: 180 days (ACA minimum)
• External review: 4 months
• Key law: Georgia Code §33-24-59.5

Timely Filing Limits vs. Appeal Deadlines: Know the Difference

There's an important distinction between appeal deadlines and timely filing limits:

• Timely filing limit (CO-29): The deadline to originally submit a claim after the date of service. This ranges from 90 days (some Medicaid plans) to 365+ days depending on the payer. Missing this causes a CO-29 denial.
• Appeal deadline: The time you have after receiving a denial to challenge it. These are separate clocks.

If you receive a CO-29 denial, you can still appeal — but your argument must focus on why the timely filing limit shouldn't apply (e.g., payer administrative error, coordination of benefits issues, or that the claim was submitted on time and the payer's records are wrong). See our CO-29 denial code guide for details.

Practical Tips to Never Miss a Deadline

• Date-stamp every denial notice the day it arrives and immediately calendar the appeal deadline.
• For borderline timely claims, send your appeal via certified mail or through the payer portal to get proof of submission.
• If you discover a denied claim late, check the date on the denial letter — not when you found it. The clock usually starts from the denial date or date you could reasonably have known about the denial.
• Ask for a deadline extension if you have good cause (unavailability of medical records, hospitalization, etc.). Many payers grant these, though they're not required to.
• Keep copies of everything — appeal letters, fax confirmations, portal submission screenshots. If there's ever a dispute about whether you appealed in time, documentation wins.

For more resources, download our free guide to appealing insurance denials, which includes a complete checklist for managing appeal timelines. And visit our Denial Code Library for step-by-step guidance on every major denial code.