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  • Writer's pictureJohn Larrimer

A Complete Guide Regarding What Is MMI in Workers' Comp

MMI stands for Maximum Medical Improvement in the medical field. The premise of MMI is one of the trickiest topics in workers' compensation claims. Even if a worker sustained a back, knee, or foot injury at work, figuring out MMI can be difficult. The workers' compensation insurance provider uses MMI to describe the point where it is unlikely that the injuries or medical condition will continue to improve.

When MMI is determined, it basically calculates the value of the workers' compensation claim with the help of permanent limitations and capabilities. A doctor will list all the patient's abilities and the tasks they can and cannot perform.

What Is Maximum Medical Improvement MMI?

What Is Maximum Medical Improvement MMI?

The Maximum Medical Improvement (MMI) milestone is very significant in a worker's compensation lawsuit. Injured victims can better prepare for the settlement of their claim and what comes next if they comprehend the significance and effects of MMI.

An MMI determination can result in the payment of a permanent disability award and stops an injured worker's eligibility for continuous wage loss compensation. The highest and most important monetary benefits available in a worker's compensation claim are frequently permanent disability payments.

A common misunderstanding is that, by the time an injured employee reaches MMI, everything should be back to normal, or they should have fully recovered. An MMI determination actually indicates that the injured worker's condition is as good as it can be given the circumstances and that no more medical care will significantly worsen it.

Simply put, the worker has reached the maximum medical improvement point. By this time, doctors must have tried every plausible option for their medical treatment.

The worker's comp doctor has the option, but not the obligation, to impose permanent work limitations at the time of MMI. Even with considerable impairment and a final award, many injured workers are classified at MMI but later return to work with no official limits imposed. Simply said, it depends on how the damage occurred.

Medical Expenses for Workers Compensation Claim

The payment of medical expenditures required to recover from an injury is one of the most significant benefits of a workers' compensation claim. Any insurance shouldn't put off meeting this demand because it is urgent.

It's crucial that the workers receive all the required and appropriate therapy to assist in the recovery to put them in the best position to go forward successfully following a work-related accident.

According to Ohio law, once a claim is approved, the insurer must pay for "reasonable primary medical services, especially prescription medicines" for conditions that directly result from the injury. This includes the primary medical services required to assist an injured worker in reaching "maximum medical improvement".

Who Determines Maximum Medical Improvement?

The only person who can assess MMI is the treating physician who carried out a free initial consultation, but an employer can also ask for an Independent Medical Exam (IME), who will then make this decision after studying the patient's medical records and seeing the patient in person. Agencies like the Bureau of Workers' Compensation can also conduct their own examination.

Total temporary compensation ends on the day of the examination or the day the treating physician gives clearance if the treating physician accepts the MMI conclusion made by the IME. The claim is sent either to the Industrial Commission or to a workers' compensation judge for a hearing and judgment if the treating physician disagrees.

Calculating Workers' Comp Benefits

The treating physician also assesses the patient for a prospective impairment rating if it has been determined that the worker has attained maximum medical improvement. Once assigned, impairment ratings are used to assist the insurer in calculating the final award amount for the injured worker.

There are numerous options in terms of potential workers' comp benefits at the time of an MMI case:

No Future Benefits

If a treating physician refers an injured worker to maximum medical improvement without identifying any impairment or recommending further treatment, the claim is closed, and no further benefits are due (unless steps are taken to challenge the physician's diagnosis).

Maintenance Benefits Care

In some cases, a doctor may additionally suggest "maintenance" care to prevent the injured worker's condition from worsening, even when they have determined that the person has plateaued and reached maximum medical improvement. These medical treatment benefits are usually small in scope and only last a few months to cover medical expenses.

Permanent Partial Disability Benefits

When an impairment rating is issued to the injured employee, but they can still work, these benefits are paid. Despite the name including the word "disability," this does not imply that they are bound by limitations forever. It is simply the term for wage loss benefits that will gain a lump sum payment and medical benefits.

Permanent Total Disability

According to the Workers Compensation Law, if the worker's occupational damage renders them incapable of working again, these payments are paid for life as wage loss benefits.

How Long Does Workers' Comp Take to Make an Offer After an MMI Case?

A worker is considered to be in MMI after an approved physician or an independent medical examination determines that no additional medical treatment improves their situation. The workers comp claim is usually determined six weeks after the IME.

They will rate every patient using a specific scale that will determine if the worker has:

  • Temporary partial disability (TPD)

  • Temporary total disability (TTD)

How Does the MMI Rating Affect a Workers' Comp Claim?

Anyone who has a work-related injury or fell ill at work as a direct result of the working conditions has the right to file a claim for workers comp. However, a state-certified doctor must prepare an MMI report outlining the extent of the injuries or illness to calculate the proper compensation for the medical bills. The impairment rating in this report is given a score out of 100.

An MMI value of 0% implies complete recovery, whereas anything higher denotes a functional decline. The MMI rating is necessary so that the DWC can give an individual's claim a value. An individual is eligible for higher compensation for continued medical treatment if the MMI rating is high.

Workers that reach maximum medical improvement in a workers' comp claim can impact the amount of any potential settlement with the insurance carrier, the worker's disability rating, and the work prospects for the future.

Does the Medical Treatment Stop If the MMI Stops?

Even though the workers' compensation benefits may stop, medical care does not have to. If anyone requires therapy, they can continue it because stopping it after MMI may cause the medical condition to regress or worsen. Once the MMI is attained, a person's injury-related medical condition could worsen in the future, requiring extra medical treatment.

How to Contest an MMI Determination

Injured employees who are dissatisfied with an MMI determination or the benefits payable after MMI may request a "Division Independent Medical Examination," or DIME.

With this procedure, a different medical professional can offer a second opinion on whether MMI has been attained, whether ongoing medical treatment is necessary, and whether any relevant impairments are available for workers comp.

An insurance company is also permitted to ask for a DIME. It rarely does so in response to the MMI determination in and of itself, although it might if it believes an impairment level to be excessive, and further medical treatment is necessary.

The doctor's conclusions regarding the DIME are final if a future workers' comp hearing results in the decisions being overturned. Without clear and persuasive evidence, the DIME-determined impairment rating and MMI date cannot be changed.

Why Do Injured Workers Fear Maximum Medical Improvement?

Why Do Injured Workers Fear Maximum Medical Improvement?

It is hardly a reason to celebrate when someone reaches MMI. Workers frequently worry that their benefits and medical care will expire after they reach MMI. As soon as MMI is established, the business that pays the workers' compensation insurance carrier may discontinue paying the total, partial benefit.

The injured worker may accept a settlement from the workers' compensation carrier in the amount requested in exchange for signing a release. They waive all future claims against the workers' compensation carrier once they concur and sign the release. This implies they won't have any options to pursue further compensation to cover their medical bills if their injury worsens.

Even after the employee reaches MMI, the employer will still be liable if they are deemed responsible for all of the worker's future medical costs associated with the accident. They must also keep paying for their medical expenses and disability benefits in light of this situation. The employer and/or insurance carrier must still pay medical benefits until the injured worker accepts a settlement and signs a release.

In fact, a person remains eligible for the following benefits even after reaching MMI:

  • Compensation lost for wages

  • Rehabilitation costs

  • Permanent total disability

  • Lum sum settlement

  • Compensation for percentage of Permanent Partial Disability


It's simple to understand why having a workermans compensation attorney in Columbus is essential once people comprehend the significance reaching MMI has for the future. While hiring an attorney for the first time, it's crucial to look for the appropriate qualities.

MMI workers require a lawyer from Larrimer & Larrimer in Columbus, OH, with the necessary skills, substantial experience, and a background with a long track record of achievement in the workers comp field.

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