How Long Does a Workers' Comp Investigation Take? 2026 State Guide

Overview: What Happens During a Workers' Comp Investigation?

When you file a workers' comp claim, the insurance carrier has a statutorily limited window to either accept, deny, or take investigatory status on your claim. During the investigation, the carrier looks for reasons to deny — or at least reduce — benefits.

Typical areas of investigation:

• Compensability — Did the injury arise out of and in the course of employment?
• Causation — Did the work actually cause the injury, or is it pre-existing?
• Extent of injury — Are you really as injured as you claim?
• Wages — Is your claimed AWW accurate, or higher than it should be?
• Fraud indicators — Any red flags suggesting exaggeration?

The good news: most investigations end with an accepted claim. The bad news: you'll feel watched.

State Deadlines for Claim Acceptance or Denial

| State | Accept/Deny Deadline | Notes | | --- | --- | --- | | Alabama | 21 days | From notice to employer | | Alaska | 21 days | From filing | | Arizona | 21 days | From filing | | California | 14 days (begin treatment) / 90 days (final decision) | Treatment auth within 14; investigation up to 90 | | Colorado | 20 days | From notice | | Connecticut | 28 days | Form 1A | | Florida | 14 days | Fastest in the country | | Georgia | 21 days | From notice | | Illinois | 7 days (notify) / 30 days (decide) | Tight timeline | | Indiana | 30 days | From notice | | Michigan | 14 days | Notice of Dispute required | | Minnesota | 14 days | Strict enforcement | | Missouri | 30 days | | | New Jersey | 21 days | Approved or contested | | New Mexico | 30 days | | | New York | 18 days | From claim filing | | Ohio | 28 days | BWC-managed | | Oklahoma | 15 days | | | Pennsylvania | 21 days | Notice of Compensation Payable | | Texas | 15 days | From notice | | Virginia | 21 days | Commission notification | | Washington | 14 days | L&I managed | | Wisconsin | 14 days | |

⚠️ Critical tip: If the carrier misses the deadline in several states (NY, IL, others), the claim is deemed accepted by operation of law. Don't let them quietly miss the deadline — if it passes, your attorney can enforce the automatic acceptance.

What Investigators Look For

1. Inconsistencies in your story — The accident report, initial medical record, and your recorded statement must align. Any conflict is fodder for denial.
2. Pre-existing conditions — Prior MRIs, chiropractor visits, gym memberships, old injury claims. All used to argue "pre-existing."
3. Social media activity — The single most-searched evidence source today.
4. Surveillance video — Both their own (PI surveillance) and yours (grocery store cameras, dashcams).
5. Witness statements — Co-workers' versions are often slightly different from yours.
6. Medical records — Every prior doctor visit for the body part in question.

How to Protect Yourself During Investigation

1. Give only the required statement. You must report the injury; you are not required to give a recorded statement without legal advice. Decline until you've talked to an attorney.
2. Follow all medical advice. Keep every appointment. Miss three in a row and expect the carrier to argue you're not really injured.
3. Document everything. Keep a daily journal of pain levels, activities, treatments. Photograph everything.
4. Make social media private. Better: stop posting entirely until the case closes.
5. Don't sign blanket medical releases. Release only records related to the injured body part and the past 5–7 years — not your entire medical history.

What to Do if Your Claim Is Denied After Investigation

Denials happen in 15–20% of claims nationally — much higher for spinal, mental health, and cumulative trauma cases. Your steps:

1. Get a written denial. Every state requires the carrier to issue a written denial with specific reasons.
2. Request a hearing within the state's appeal window (typically 30–90 days).
3. Hire an attorney — data shows represented claimants win 62% of appeals vs 37% unrepresented.
4. Gather independent medical evidence. A treating-physician opinion that specifically links the injury to work is powerful.
5. Show up prepared. Judges expect specific dates, medical records, and a clear narrative.

See our Workers' Comp Denied guide for the full appeal process.

Sources

• State workers' comp board statistical bulletins (all 50 states)
• NCCI Annual Report 2026
• U.S. Bureau of Labor Statistics — Workplace Injury Statistics