Updated: July 12, 2026 · 12 min read
An impairment rating is a percentage a doctor assigns after your work injury has stabilized. It measures how much permanent function you have lost. In New York workers' compensation cases, this percentage directly sets the length and amount of benefits you can receive. That is especially true for injuries to scheduled body parts like an arm, hand, or leg.
That single number carries enormous weight. It can be the difference between a modest award and a substantial one. It also shapes any settlement you might negotiate later. Yet most injured workers never get a clear explanation of what the impairment rating means, how the doctor arrived at it, or what to do if it seems too low. This article walks through all of it. You will learn when you get a rating, how it is calculated, the two very different ways New York uses it, and what you can do if you disagree.
At The Orlow Firm, we have represented injured workers throughout Queens and New York City since 1982. We have seen how often a low impairment rating quietly costs someone the benefits they are owed.
When Do You Get an Impairment Rating?
You do not get an impairment rating right after an accident. It comes later, once your medical condition reaches a stable state. Doctors call this Maximum Medical Improvement, or MMI.
MMI means your condition is not expected to get much better with further treatment. It does not mean you have fully recovered. It means you have plateaued. The surgeries, physical therapy, and medications have done what they are going to do, and your remaining limitations are likely permanent. Only at that point can a doctor fairly measure how much function is permanently gone.
Under New York Workers' Compensation Board rules, MMI generally cannot be declared earlier than six months from the date of injury. That applies to cases that did not involve surgery or a fracture. In practice, the rating often arrives somewhere between six and 18 months after the injury. It depends on how long recovery takes and how quickly the paperwork moves.
The evaluation usually starts with your own treating physician. That doctor submits Form C-4.3, the Doctor's Report of MMI/Permanent Impairment. The insurance carrier may also send you to an Independent Medical Examiner (IME), a doctor the insurer selects and pays. Both reports become part of the record, and they frequently disagree.
How Is an Impairment Rating Calculated in New York?
Doctors do not assign a rating based on gut feeling. They follow the New York State Guidelines for Determining Permanent Impairment. For scheduled body parts such as extremities, eyes, and hearing, physicians apply the 2018 SLU Impairment Guidelines. For non-scheduled injuries, such as those to the spine or brain, they use the 2012 guidelines.
The evaluation is a hands-on physical exam. Depending on the body part, it can include:
- Range-of-motion testing to measure how far a joint bends, rotates, or extends compared to normal
- Strength and grip testing
- Sensory testing for numbness or nerve damage
- Functional assessments of how the injury affects everyday movement
The doctor also reviews your imaging, surgical reports, and treatment records. From all of this, the doctor assigns a percentage between 0% and 100% for the affected body part or system. A 50% impairment of the arm, for example, means roughly half of your normal arm function is permanently gone.
The impairment rating depends heavily on measured findings, so thorough documentation matters. A doctor who records every limitation tends to support a higher, more accurate rating than one who does a quick, cursory exam.
Two Types of Injuries, Two Ways the Rating Is Used
This is the part that confuses most people, and it is the most important section to understand. New York treats work injuries on two separate tracks. Your impairment rating is used very differently depending on which track your injury falls under.
Schedule Loss of Use (SLU) — Scheduled Body Parts
The first track covers what the law calls scheduled body parts: arms, legs, hands, feet, thumbs, fingers, toes, eyes, and hearing. For these injuries, the impairment rating drives a Schedule Loss of Use award through a set formula:
SLU % × Maximum Scheduled Weeks × (Average Weekly Wage × 2/3)
Each body part has a maximum number of weeks set by Workers' Compensation Law § 15(3):
| Body Part | Maximum Weeks |
|---|---|
| Arm | 312 |
| Leg | 288 |
| Hand | 244 |
| Foot | 205 |
| Eye | 160 |
| Thumb | 75 |
| First finger | 46 |
| Second finger | 30 |
| Third finger | 25 |
| Fourth finger | 15 |
| Big toe | 38 |
| Other toe | 16 |
Here is how the math works in practice. Imagine a worker earning $900 a week who receives a 25% loss-of-use rating for a hand injury. The hand carries a maximum of 244 weeks, so 25% of 244 equals 61 payable weeks. Two-thirds of $900 is $600 per week. Multiply 61 weeks by $600, and the total SLU award comes to $36,600.
Two figures cap that calculation. For the period of July 1, 2025 through June 30, 2026, the maximum weekly benefit is $1,222.42, with a minimum of $325 per week for injuries sustained in 2025. These figures are indexed and adjusted each year, so the cap that applies to your case depends on your date of injury. This example is for educational purposes only. The actual figures in any case depend on current Board rules and your specific wage and rating.
Non-Schedule Injuries — Spine, Brain, and Internal Organs
The second track works completely differently. Non-scheduled injuries include the back, neck, spinal cord, traumatic brain injuries, internal organs, and the respiratory system. For these, the impairment rating is not plugged into a simple week-based formula.
Instead, the Board uses the impairment rating together with vocational factors. Those factors include your age, education, work history, and transferable skills. Together they determine your Loss of Wage Earning Capacity (LWEC). That LWEC finding then drives your ongoing weekly benefit payments.
The key thing to understand is that a 30% spinal impairment rating does not automatically translate into 30% of some fixed number of weeks. For non-scheduled injuries, the rating is one input into a broader, case-by-case look at how much your earning ability has dropped. Two workers with identical spinal ratings can end up with very different benefit outcomes based on their jobs and prospects.
What's in this video?
This video explains how workers' compensation benefits work in New York, including how permanent impairment ratings translate into benefit payments. It covers the types of benefits available and how the system determines what injured workers are owed.
Impairment Rating vs. Disability Rating — What Is the Difference?
People often use "impairment" and "disability" interchangeably. In New York workers' compensation, though, they are two separate concepts assigned by two different decision-makers.
An impairment rating is a medical measurement. It is the doctor's finding of how much physical or functional loss you have, expressed as a percentage. It looks only at the body.
A disability classification is a legal and vocational decision. The Workers' Compensation Board judge decides it. The judge considers your impairment alongside the real-world demands of your job. It looks at how the injury affects your ability to earn a living.
That distinction can produce surprising results in both directions. A surgeon with a 15% shoulder impairment might be classified as severely disabled, because that limitation makes operating impossible. Meanwhile, a worker with a much higher impairment rating might return to a sedentary desk job with little wage loss and a low disability finding.
New York recognizes four disability classifications, which are separate from the impairment percentage itself:
- Temporary Total
- Temporary Partial
- Permanent Total
- Permanent Partial
Consider a construction worker on a Manhattan job site who tears a rotator cuff and receives a 20% arm impairment rating. The job demands constant overhead lifting, so the judge may assign a far higher disability for wage-loss purposes than the 20% medical figure alone would suggest. The medical number and the wage-loss number are not the same thing.
How the Impairment Rating Affects Your Settlement
If you ever consider settling your claim, the impairment rating becomes a central bargaining chip. Most workers' compensation cases that resolve in a lump sum do so through a Section 32 Waiver Agreement. That is a voluntary settlement that closes out some or all of the claim in exchange for a set payment.
The rating is one of the primary levers in calculating and negotiating that amount. A higher rating means more compensable weeks on the SLU track, or a higher LWEC finding on the non-schedule track. Both push the settlement value up. A lower rating pushes it down. This is exactly why insurance carriers have a financial incentive to keep ratings low. It is also why their IME doctors, who are paid by the carrier, often produce more conservative numbers than your treating physician.
A Section 32 agreement can take different shapes. You might settle your indemnity (wage-replacement) benefits while keeping your medical benefits open. Or you might settle both in a full and final agreement. There is one feature every injured worker should understand before signing: a Section 32 settlement is final. Once approved by the Board and the 10-day withdrawal period expires, it generally cannot be reopened without the consent of all parties. That permanence is a reason to be certain about the numbers, including the rating behind them, before you agree.
Can You Dispute Your Impairment Rating in New York?
Yes. An impairment rating is not the last word. It does not become final until a Workers' Compensation Board judge issues a decision. That means you have room to challenge a number you believe is too low.
Disputes commonly arise when an IME doctor performed a brief or cursory exam, overlooked symptoms, failed to follow the state guidelines, or applied outdated criteria. Remember that IME doctors are retained and paid by the insurance carrier. They are not neutral. Their reports work as advocacy documents for the insurer, and you should read them with that in mind.
Challenging a rating generally follows three steps:
- Your treating physician submits their own Form C-4.3 with a higher impairment percentage, backed by detailed clinical findings.
- Your attorney requests a hearing before a Workers' Compensation Board judge.
- The judge weighs both medical opinions and issues a binding decision.
The strength of your treating doctor's documentation often decides the outcome. Functional limitations that go unrecorded cannot help you. So it is critical that your physician thoroughly documents every restriction, every loss of motion, and every lasting symptom.
Injuries That Often Lead to High Impairment Ratings
Some injuries reliably produce higher ratings because they cause significant, measurable, permanent loss. These include:
- Amputations. An amputation at the wrist generally results in a total loss of use of the hand. The precise percentage assigned to the arm depends on the level of amputation and the applicable guidelines.
- Spinal cord injuries. These can support a permanent total disability classification.
- Traumatic brain injury. Even a mild TBI with lasting cognitive effects can carry a significant whole-body impairment percentage under the 2012 guidelines.
- Severe joint injuries to the shoulder, knee, or hip, which leave ongoing range-of-motion and strength deficits.
- Nerve damage that causes permanent weakness, numbness, or loss of dexterity.
- Vision or hearing loss, both scheduled body parts with defined maximum weeks.
Related Questions
What is Maximum Medical Improvement (MMI) and why does it matter?
MMI is the point at which your condition has stabilized and is not expected to improve much with further treatment. It matters because no permanent impairment rating can be assigned until you reach it. Your remaining limitations have to be permanent before a doctor can measure them. Reaching MMI is what opens the door to a permanency award.
When will I receive my impairment rating after a work injury?
There is no fixed date. The rating cannot be assigned until you reach MMI. Under Board rules, MMI generally cannot be declared before six months from the injury in cases without surgery or fracture. Realistically, most workers receive an impairment rating somewhere between six and 18 months post-injury, depending on recovery time and how quickly medical reports are filed.
Who decides my impairment rating — my doctor or the insurance company's doctor?
Both doctors offer an opinion, but neither has the final say. Your treating physician submits a rating. The insurer's IME doctor often submits a competing, lower one. If the two disagree, a Workers' Compensation Board judge weighs both medical reports and issues the binding decision.
What is a Schedule Loss of Use award and how does it relate to my impairment rating?
A Schedule Loss of Use (SLU) award is the benefit paid for permanent loss of function in a scheduled body part — an arm, hand, leg, or eye. Your impairment rating is the key percentage in the SLU formula. Multiply the rating by the body part's maximum weeks, then by two-thirds of your average weekly wage. A higher impairment rating means more payable weeks and a larger award.
This article provides general information and is not legal advice. Every case is different. Contact an attorney to discuss your specific situation.
Sources & Official Resources
New York Laws Cited
New York Workers' Compensation Board Resources 2. NY WCB — Impairment Guidelines Overview 3. NY WCB — 2018 SLU Impairment Guidelines (PDF) 4. NY WCB — Schedule Loss of Use Award 5. NY WCB — Schedule of Maximum Weekly Benefit Rates 6. NY WCB — Awards for Loss of Use or Permanent Disability 7. NY WCB — Section 32 Waiver Agreement FAQ
Contact The Orlow Firm
Have you been injured at work in New York City and received, or are expecting, an impairment rating? That number matters enormously for your benefits and any potential settlement. A low rating can quietly reduce what you recover, and the insurance company already has doctors working to keep it low. You deserve someone reviewing that number on your behalf.
The Orlow Firm has helped injured workers throughout Queens and New York City for more than 40 years, across all five boroughs.
Call (646) 647-3398 for a free consultation. We work on contingency — you pay nothing unless we win.
The Following People Contributed to This Page
