Nathan E. Douglas appeals the district court’s * dismissal of Douglas’s action seeking judicial review of the Commissioner’s denial of disability insurance benefits. An administrative law judge decided that an earlier determination could not be reopened because it was issued more than four years ago, and res judicata barred consideration of the present application. The district court dismissed Douglas’s action because 42 U.S.C. § 405(g) does not allow judicial review of decisions to dismiss claims based on res judicata.

After de novo review, see Boock v. Shalala, 48 F.3d 348, 351 & n. 2 (8th Cir. 1995), we agree with the district court. We have recognized only two exceptions to the general rule prohibiting judicial review of decisions denying applications on the basis of res judicata. See Yeazel v. Apfel, 148 F.3d 910, 911-12 (8th Cir. 1998). We conclude neither exception applies here. First, we do not believe the Commissioner reopened the earlier determination as a matter of administrative discretion. See 20 C.F.R. §§ 404.988(b)-(c), 416.1488(c) (2001); Burks-Marshall v. Shalala, 7 F.3d 1346, 1348 & n. 6 (8th Cir. 1993). Second, we conclude Douglas has not presented a colorable constitutional claim related to either his alleged mental impairment, see Boock, 48 F.3d at 352, or the lack of a hearing concerning the earlier determination, see Yeazel, 148. F.3d at 912.

*296 We affirm the judgment of the district court. See 8th Cir. R. 47B.

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