Example 1: You were awarded disability benefits due to a herniated nucleus pulposus which was determined to equal the level of severity contemplated by Listing 1.05.C. At the time of our prior favorable decision, you had had a laminectomy. Postoperatively, a myelogram still showed evidence of a persistent deficit in your lumbar spine. You had pain in your back, and pain and a burning sensation in your right foot and leg. There were no muscle weakness or neurological changes and a modest decrease in motion in your back and leg. When we reviewed your claim your treating physician reported that he had seen you regularly every 2 to 3 months for the past 2 years. No further myelograms had been done, complaints of pain in the back and right leg continued especially on sitting or standing for more than a short period of time. Your doctor further reported a moderately decreased range of motion in your back and right leg, but again no muscle atrophy or neurological changes were reported. Medical improvement has not occurred because there has been no decrease in the severity of your back impairment as shown by changes in symptoms, signs, or laboratory findings.
Example 2: You were awarded disability benefits due to rheumatoid arthritis of a severity as described in Listing 1.02 of appendix 1 of this subpart. At the time, laboratory findings were positive for this condition. Your doctor reported persistent swelling and tenderness of your fingers and wrists and that you complained of joint pain. Current medical evidence shows that while laboratory tests are still positive for rheumatoid arthritis, your impairment has responded favorably to therapy so that for the last year your fingers and wrists have not been significantly swollen or painful. Medical improvement has occurred because there has been a decrease in the severity of your impairment as documented by the current symptoms and signs reported by your physician. Although your impairment is subject to temporary remissions and exacerbations the improvement that has occurred has been sustained long enough to permit a finding of medical improvement. We would then determine if this medical improvement is related to your ability to work.
Example: The electrocardiographic exercise test has replaced the Master's 2-step test as a measurement of heart function since the time of your last favorable medical decision. Current evidence could show that your condition, which was previously evaluated based on the Master's 2-step test, is not now as disabling as was previously thought. If, taking all your current impairments into account, you are now able to engage in gainful activity, this exception would be used to find that you are no longer disabled even if medical improvement has not occurred.
Example: You were granted benefits when it was determined that your epilepsy met Listing 11.02. This listing calls for a finding of major motor seizures more frequently than once a month as documented by EEG evidence and by a detailed description of a typical seizure pattern. A history of either diurnal episodes or nocturnal episodes with residuals interfering with daily activities is also required. On review, it is found that a history of the frequency of your seizures showed that they occurred only once or twice a year. The prior decision would be found to be in error, and whether you were still considered to be disabled would be based on whether your current impairment(s) meets or equals the requirements of appendix 1 of this subpart.
Example: You were previously granted disability benefits on the basis of diabetes mellitus which the prior adjudicator believed was equivalent to the level of severity contemplated in the Listing of Impairments. The prior record shows that you had "brittle" diabetes for which you were taking insulin. Your urine was 3 + for sugar, and you alleged occasional hypoglycemic attacks caused by exertion. On review, symptoms, signs and laboratory findings are unchanged. The current adjudicator believes, however, that your impairment does not equal the severity contemplated by the listings. Error cannot be found because it would represent a substitution of current judgment for that of the prior adjudicator that your impairment equaled a listing.
20 C.F.R. §404.1579