Califano v. Sanders, (430 U.S. 99 [1977]) foreclosed judicial review of reopening decision absent a constitutional claim. Claimant's 1973 claim was properly dismissed on res judicata grounds, since the claim was identical to one heard and denied in 1965, after claimant's eligibility for benefits expired. Claimant's contention that his condition had deteriorated after his eligibility lapsed does not affect the finality or validity of the prior determination.