A 0% rating means VA confirmed service connection. The condition is documented - what it lacks is severity evidence. This tool maps each condition's path to the next tier under 38 C.F.R. Part 4.
Conditions
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Indexed
Authority
Part 4
38 C.F.R.
Insight
Tier-by-tier
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WHY 0% MATTERS
A 0% rating is service connection without compensation. The hard part is done. You only need severity evidence to move it up the schedule. File a supplemental claim with medical evidence aligned to the next tier criteria, or request a new C&P exam if the condition has worsened.
Educational tool. Cites 38 C.F.R. Part 4 (Schedule for Rating Disabilities), § 3.156(d) (supplemental claim with new evidence). Final rating decisions are VA's; this tool surfaces tier criteria only.