StacksVerified U.S. regulatory reference

42 CFR §81.23

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)In claims for which the primary cancer site cannot be determined, but a site of metastasis is known, DOL will calculate probability of causation estimates for various likely primary sites. Table 1 of this paragraph (a) indicates the primary cancer site(s) DOL will use in NIOSH-IREP when the primary cancer site is unknown.
  2. (b)DOL will select the site producing the highest estimate for probability of causation to adjudicate the claim.