The doctor said the words you had been dreading: maximum medical improvement. Your treatment is done. Your condition has stabilized. Now comes the rating — a single percentage number that will determine how much money you receive for an injury you will carry the rest of your life.
And here is what nobody tells you before that appointment: the doctor doing the rating may work for the insurance company. Their incentive is not to rate you as high as possible. The system is not neutral.
I have spoken with injured workers in New Jersey who walked out of an IME — independent medical examination — with a rating that felt nothing like their actual limitations. One man with a crushed lumbar vertebra was rated at 12% whole person impairment. His treating physician had estimated 28%.
Understanding how your state calculates permanent disability ratings is the first step to knowing whether the number you were given is fair.
What a Permanent Disability Rating Actually Measures
A permanent disability rating measures the lasting functional loss caused by a work injury after you have reached maximum medical improvement. It is expressed as a percentage — either of the whole person or of a specific body part depending on your state’s system.
The rating is not a measure of your pain. It is not a measure of how much your life has changed. It is a clinical measurement of how much physical function you have lost compared to a baseline of full function.
That distinction matters because it means the rating can feel deeply inadequate relative to how the injury actually affects your daily life — and legally, that feeling does not change the number.
The Two Main Rating Systems — AMA Guides vs State Schedules
AMA Guides to the Evaluation of Permanent Impairment
The American Medical Association publishes a reference guide used in most states to rate permanent impairment. The current edition is the Sixth Edition — though some states still mandate the Fifth Edition. The AMA Guides provide standardized criteria for evaluating impairment across every body system — spine, extremities, neurological, cardiovascular and more. Using a standardized guide reduces variation between doctors — in theory.
State-Specific Scheduled Award Systems
Many states use a “schedule of injuries” that assigns fixed benefit amounts to specific body parts regardless of an AMA rating. Lost a finger? The schedule says you get X weeks of benefits. Lost hearing in one ear? Y weeks. These scheduled awards are easier to calculate but do not account for how an injury uniquely affects a specific worker’s ability to do their job.
Occupation-Adjusted Systems
A smaller number of states — including California — apply occupational adjustments to the base impairment rating. A 15% whole person impairment rating for a surgeon who can no longer perform surgery is treated differently than the same rating for an office worker who can still do their job. The final disability rating reflects both the medical impairment and the vocational impact.
Permanent Disability Rating Systems — All 50 States 2026
| State | Rating System Used | How It Works + Key Details |
|---|---|---|
| Alabama | AMA Guides (5th Ed) | Whole person impairment rating using AMA 5th Edition. Benefits calculated based on rated impairment percentage multiplied by state benefit schedule. WCC oversees all permanent disability determinations. |
| Alaska | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Permanent partial disability paid as lump sum based on rating. WCB reviews all permanent disability awards. |
| Arizona | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. ICA converts rating to scheduled benefit amount. Unscheduled injuries use earning capacity loss to determine benefits. |
| Arkansas | AMA Guides (4th Ed) | Arkansas uses the older 4th Edition AMA Guides. Whole person impairment converted to benefit weeks. Commission oversees all permanent impairment ratings. |
| California | PDRS + Occupation Adjustment | California uses its own Permanent Disability Rating Schedule (PDRS) based on AMA 5th Edition but with occupation and age adjustments. Final PD percentage accounts for how the impairment affects your specific job. One of the most complex rating systems in the country. |
| Colorado | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Permanent partial disability pays 67% of AWW for the number of weeks corresponding to the rating. Division Director oversees disputes. |
| Connecticut | AMA Guides (5th Ed) | Scheduled and unscheduled injuries. Scheduled injuries use body part schedule. Unscheduled use AMA 5th Edition whole person impairment. Commissioner approves all permanent disability awards. |
| Delaware | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. IAB converts rating to benefit weeks at two-thirds of AWW. Scheduled losses available for specific body parts. |
| Florida | AMA Guides (6th Ed) | Impairment Income Benefits (IIBs) paid based on AMA 6th Edition rating. Formula: rating percentage × 3 weeks of benefits at 75% of TTD rate. One of the lower permanent disability payouts relative to injury severity. |
| Georgia | State Schedule + AMA Guides | Scheduled injuries for listed body parts. Unscheduled injuries use AMA Guides. Benefits paid at two-thirds of AWW for the number of weeks assigned to the rating. State Board oversees all awards. |
| Hawaii | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. DLIR converts rating to benefit schedule. Scheduled awards available for specific listed body parts. |
| Idaho | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition combined with earning capacity loss for unscheduled injuries. Industrial Commission oversees all permanent disability determinations. |
| Illinois | State Schedule (% of loss) | Illinois uses percentage of loss of use of a body part — not whole person impairment. Specific body parts have set maximum weeks. Benefits at 60% of AWW. One of the more worker-favorable scheduled systems. |
| Indiana | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. PPI (Permanent Partial Impairment) benefits paid as lump sum based on rating and AWW. WCB oversees all determinations. |
| Iowa | Functional Impairment + Earning Capacity | Iowa uses a two-factor system — physical impairment and loss of earning capacity. Industrial Commissioner weighs both factors. Often results in higher awards than pure AMA ratings for workers whose injury affects their job significantly. |
| Kansas | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Benefits calculated from rating × 15 weeks × AWW (subject to caps). WCAB oversees disputes. |
| Kentucky | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. ALJ can apply multipliers based on worker’s education, age and job skills — increasing final award beyond raw rating. |
| Louisiana | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Supplemental earnings benefits available if worker cannot earn 90% of pre-injury wage. OWC oversees all permanent disability awards. |
| Maine | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. After 260 weeks, employer can petition for reduction if worker has some earning capacity remaining. WCB oversees all permanent awards. |
| Maryland | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. IWCC converts rating to percentage of total disability benefit. Scheduled losses available for specific body parts at set rates. |
| Massachusetts | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. DIA judges have discretion in applying ratings. Massachusetts workers can challenge inadequate ratings through formal hearing process. |
| Michigan | Wage Loss System | Michigan is unique — permanent disability benefits are based on actual wage loss rather than an impairment rating. If you can earn what you earned before, you receive nothing for permanent impairment regardless of the rating. If you earn less, you receive a percentage of the difference. |
| Minnesota | Minnesota DOLI Schedule | Minnesota uses its own schedule of permanent partial disability values — not directly AMA Guides based. Each body part and condition has an assigned value. DLI administers the schedule. Benefits paid as lump sum based on assigned value. |
| Mississippi | AMA Guides + State Schedule | Scheduled injuries use state body part schedule. Unscheduled injuries use AMA Guides whole person impairment. MWCC converts to benefit weeks at two-thirds AWW. |
| Missouri | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. ALJ can increase award based on occupational disability beyond medical impairment. Second Injury Fund available for workers with pre-existing conditions. |
| Montana | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Impairment awards paid as lump sum. Wage loss benefits separate from impairment award. DLI oversees all permanent disability awards. |
| Nebraska | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. WCC converts rating to benefit schedule. Loss of earning capacity considered for unscheduled injuries. |
| Nevada | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. PPD benefits paid as percentage of AWW for set duration based on rating. DIR oversees all permanent disability determinations. |
| New Hampshire | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. Impairment award paid as lump sum in addition to any wage replacement benefits. Labor Department oversees all awards. |
| New Jersey | NJ Disability Schedule | New Jersey uses its own disability schedule — not directly AMA Guides based. Judge of Compensation determines disability percentage at formal hearing. Both medical and occupational disability considered. Division of Workers Compensation oversees all permanent disability awards. |
| New Mexico | AMA Guides (4th Ed) | New Mexico still uses the 4th Edition AMA Guides. Whole person impairment converted to partial disability benefit. WCA administers all permanent disability awards. |
| New York | NY Schedule + WCB Classification | New York uses its own schedule for listed injuries and WCB classification for unscheduled injuries. WCB classifies permanent partial disabilities based on loss of wage earning capacity — not purely on medical impairment. One of the more worker-favorable systems for serious injuries. |
| North Carolina | State Schedule + AMA Guides | Scheduled injuries use NC body part schedule. Unscheduled use AMA Guides. IC determines rating at formal hearing. Permanent total disability pays for life or 500 weeks with extension. |
| North Dakota | AMA Guides (6th Ed) via WSI | WSI monopoly state. All ratings done through WSI process. AMA 6th Edition used for whole person impairment. All disputes handled through WSI administrative process. |
| Ohio | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. BWC medical staff review all ratings. Permanent partial disability pays 66.67% of AWW for weeks corresponding to rating percentage. |
| Oklahoma | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. OWCC converts rating to benefit schedule. PPD benefits capped at 350 weeks maximum regardless of rating. |
| Oregon | AMA Guides (5th Ed) + Oregon Schedule | Oregon uses AMA 5th Edition modified by its own administrative rules. Work disability combines impairment rating with vocational factors including age and job demands. DCBS oversees all permanent disability determinations. |
| Pennsylvania | AMA Guides (6th Ed) via IRE | After 104 weeks of TTD, employer can request an Impairment Rating Evaluation (IRE). If rating is under 35% whole person impairment using AMA 6th Edition, benefits convert from total to partial disability. Critical threshold — workers near 35% should seek attorney guidance. |
| Rhode Island | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. Court determines permanent disability at formal hearing. Workers can present their own medical evidence to challenge insurer’s rating. |
| South Carolina | State Schedule + AMA Guides | Scheduled injuries use SC body part schedule with set maximum weeks. Unscheduled use AMA Guides whole person impairment. WCC reviews all permanent disability awards. |
| South Dakota | AMA Guides (4th Ed) | South Dakota uses the 4th Edition AMA Guides. Whole person impairment converted to benefit schedule. DOL administers all permanent disability awards. |
| Tennessee | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Courts can multiply rating up to 1.5× if worker cannot return to pre-injury occupation. Bureau of Workers Compensation oversees all awards. |
| Texas | AMA Guides (4th Ed) | Texas uses the 4th Edition AMA Guides for whole person impairment. Impairment Income Benefits (IIBs) paid at 70% of TTD rate for 3 weeks per rating percentage point. Supplemental Income Benefits available after IIBs if significant work capacity loss remains. |
| Utah | AMA Guides (6th Ed) | Whole person impairment using AMA 6th Edition. Labor Commission converts rating to benefit schedule. Permanent total disability pays for life if rating reflects inability to work. |
| Vermont | AMA Guides (5th Ed) | Whole person impairment using AMA 5th Edition. Impairment benefit paid in addition to ongoing wage replacement. Labor Department administers all permanent disability awards. |
| Virginia | State Schedule + AMA Guides | Scheduled injuries use VA body part schedule with set maximum weeks. Unscheduled injuries use AMA Guides. VWC determines all permanent disability ratings at formal hearing. |
| Washington | WAC Schedule via L&I | L&I monopoly state. Uses Washington Administrative Code (WAC) schedule — not directly AMA Guides based. Permanent partial disability awards determined by L&I medical staff. Pension available for permanently totally disabled workers. |
| West Virginia | AMA Guides (4th Ed) | West Virginia uses the 4th Edition AMA Guides. Whole person impairment converted to benefit schedule. Office of Judges reviews contested permanent disability ratings. |
| Wisconsin | State Schedule + AMA Guides | Scheduled injuries use WI body part schedule. Unscheduled use AMA Guides whole person impairment. DWD administers all permanent disability awards. Loss of earning capacity considered for unscheduled injuries. |
| Wyoming | AMA Guides (6th Ed) via WSD | WSD monopoly state. All ratings through WSD process using AMA 6th Edition. All disputes handled through WSD administrative appeals. No private insurers involved. |
How to Challenge a Rating You Believe Is Too Low
The rating the insurer’s doctor assigns is not final. Every state provides a mechanism to challenge it — and workers who challenge inadequate ratings frequently get them increased.
Get your treating physician’s rating in writing. Your treating doctor — the one who has actually treated you throughout recovery — knows your condition better than any IME doctor who spent 20 minutes with you. Ask them to formally document your impairment rating using the same AMA Guides edition your state requires.
Request an Independent Medical Examination. In most states you have the right to request your own IME from a doctor you select. This gives you a second formal rating that can be presented at a hearing. When two ratings conflict, the workers comp judge or board weighs both and makes a determination.
Hire a workers comp attorney before the hearing. Permanent disability rating disputes are legal proceedings. An attorney who knows your state’s rating system — including how judges in your jurisdiction typically weigh conflicting ratings — can mean the difference between a 12% award and a 28% award. On a serious injury that difference is not small money.
What Actually Happened to Robert in Pennsylvania
Robert worked in a Pittsburgh steel fabrication plant for nineteen years. A structural collapse injured his spine — three vertebrae affected, surgery required, permanent nerve damage to his left leg confirmed by MRI and nerve conduction studies.
At 104 weeks the insurer requested an IRE — Pennsylvania’s Impairment Rating Evaluation. The insurer’s chosen physician rated Robert at 34% whole person impairment using the AMA 6th Edition. Pennsylvania’s threshold for converting from total to partial disability benefits is 35%. Robert was one percentage point below the line.
His attorney challenged the rating. An independent physician — reviewing the same MRI and nerve studies — rated Robert at 38% using the same AMA 6th Edition. The discrepancy came down to how the nerve damage was classified. The WCJ reviewed both reports, heard testimony from both physicians, and sided with the independent rating of 38%.
Robert remained on total disability benefits. Had he accepted the initial 34% rating without challenge, he would have converted to partial benefits — a reduction of approximately $340 per week for the remainder of his benefit period. Over five years that was over $88,000.
One percentage point. One attorney. One challenge. The system works — but only if you use it.
Questions People Ask About Workers Comp Permanent Disability Ratings
Who assigns my permanent disability rating?
Typically a physician — either your treating doctor, a physician chosen by the insurer for an IME, or an independent physician you select. In some states the workers comp board or a judge makes the final determination after reviewing medical evidence from multiple doctors. The rating is medical but the final legal determination is made by the system that oversees your state’s workers comp process.
What is the difference between whole person impairment and scheduled loss?
Whole person impairment rates your injury as a percentage of total body function — a 20% whole person impairment means you have lost 20% of your body’s overall functional capacity. Scheduled loss assigns a fixed number of benefit weeks to specific body parts — losing a thumb might equal 60 weeks regardless of how it affects your overall function. Scheduled losses are simpler to calculate but can significantly undervalue or overvalue specific injuries depending on the worker’s occupation.
Can my rating change after it is assigned?
Yes — in two main ways. If your condition significantly worsens, you can petition to reopen your claim and seek a new rating in most states. And during the formal dispute process, a judge can reject the assigned rating and order a new evaluation. Once a settlement is signed that includes a permanent disability rating, changing it becomes very difficult or impossible depending on your state.
Does a higher rating always mean more money?
Generally yes — but the relationship varies by state. In states with scheduled awards, a higher rating means more benefit weeks at your weekly rate. In Michigan, your actual wage loss matters more than the rating percentage. In California, occupational adjustments can increase the payout of a moderate rating significantly if the injury affects your specific job. Understanding your state’s formula matters as much as the rating itself.
What is an AMA Guides edition and why does it matter which one my state uses?
The AMA Guides have been updated multiple times — the most recent major editions are the 4th, 5th, and 6th. Each edition uses different methodologies for rating the same conditions. The 6th Edition tends to produce lower whole person impairment ratings than the 5th Edition for many musculoskeletal injuries. If your state uses the 5th Edition you may receive a higher rating for the same injury than a worker in a state using the 6th Edition. This is why which edition your state mandates directly affects the dollar value of your award.
What if I had a pre-existing condition before my work injury?
Most states use an “apportionment” system — the rating is divided between the work injury and the pre-existing condition. Only the portion attributed to the work injury is compensable. For example, if you had a 10% pre-existing back condition and your work injury brought you to 30% total impairment, you may only be compensated for the 20% attributed to the work injury. This is one of the most contested areas in permanent disability law and almost always benefits from attorney representation.
How long after MMI do I receive my permanent disability award?
The timing varies by state. In some states permanent disability benefits begin immediately after the MMI determination and rating. In others they begin after TTD benefits end. In states using lump sum awards for permanent partial disability, payment comes after the rating is finalized and approved — which can take several months if disputed. Your workers comp attorney or state board can give you the specific timeline for your state and situation.
U.S. Department of Labor — Office of Workers Compensation Programs ·
National Council on Compensation Insurance (NCCI) ·
American Medical Association — Guides to the Evaluation of Permanent Impairment ·
State Workers Compensation Board Official Websites
📋 Disclaimer: The information on this page is for general educational purposes only and does not constitute legal advice. Workers compensation permanent disability rating systems vary significantly by state and change regularly. The information here reflects our research as of early 2026 and should always be verified with your state workers compensation board or a licensed workers compensation attorney. If you believe your permanent disability rating is too low, seek legal representation before accepting any award. USARoundup.com is not a law firm and does not provide legal representation of any kind.
Last reviewed and updated for 2026 · USARoundup.com
