What is the C-4.3 form and why does it matter for my workers’ comp case?

The C-4.3 form is the “Doctor’s Report of Maximum Medical Improvement and/or Permanent Impairment.” Your treating physician submits it to the Workers’ Compensation Board to formally rate how much your injury limits your ability to work.

The form does two critical things. First, it tells the WCB your work capacity — full duty, light duty, or no work at all. Second, it establishes whether you have reached Maximum Medical Improvement (MMI), meaning your condition has stabilized and is unlikely to improve further with treatment.

Once MMI is established, the Board uses the C-4.3 to classify your disability. Under NY Workers’ Comp Law, classifications include Temporary Total Disability (TTD), Temporary Partial Disability (TPD), Permanent Partial Disability (PPD), and Permanent Total Disability (PTD). Each classification carries a different benefit calculation and time limit.

If your doctor checks the wrong box, understates your restrictions, or fails to submit the form on time, your weekly payments can be reduced or suspended. The insurance carrier watches these forms closely and will use any gap or error to challenge your benefits.

You have the right to request copies of every medical form filed on your behalf. If a C-4.3 does not accurately reflect how your injury affects your daily life and work capacity, talk to your attorney immediately. A corrected report or an additional medical opinion can reverse incorrect benefit decisions.

Hablamos español — call us if you need help understanding your medical forms or hearing notices.