District of Columbia Medicaid ex parte renewal share, August 2026

Ex parte share measures how much of the renewal burden the state carries instead of the beneficiary. It trends with data-matching infrastructure, which improves in vendor-release steps rather than smoothly.

Latest 96.4 (02/26); mean monthly change over trailing window 1.79pp; damped six-month projection = 98.0.

Half-weight trend continuation with volatility-scaled uncertainty; renewal cohorts differ month to month, so the interval is wider than the point trend alone would suggest.

The resolver is a District of Columbia state row, not a national weighted average: the original first-publication August 2026 reporting-period row in the CMS eligibility processing dataset. The target is the share of completed renewals processed ex parte, reported in percent and rounded to one decimal.

Base-rate/reference-class anchor: the most relevant outside view is District of Columbia's own official-source-derived first-print observations where available from July 2025 through February 2026. The five-point inspected mean is about 93.3 percent, while the latest three observed points average about 96.3 percent, so state persistence near the ceiling is more informative than a broad national average.

Level, momentum, and mechanism: the level is already near the feasible ceiling, consistent with strong data-match coverage and mature renewal automation. Momentum remains positive over the full July-February window, but the January-to-February dip argues against mechanically extrapolating above 99 percent.

Prior/update/interval: prior model is latest-value persistence with a damped local trend, using District of Columbia's inspected July 2025, September 2025, November 2025, January 2026, and February 2026 official-source-derived first-print observations where available. Starting from the 96.4 latest inspected value, I add +1.1 pp for the positive July-February slope and +0.5 pp for continued compliance and automation pressure, limited by the 100 percent ceiling, yielding 98.0. The 80% interval uses realized sparse-sample moves up to 7.6 pp, widens for six-month cohort and system risk, and caps the upper tail below 100 at 99.0.

Counter-consideration: upside outside the interval would require DC to print essentially universal ex parte renewals, above 99 percent, in August 2026. Downside outside the interval would require a manual-heavy renewal cohort, data-source outage, eligibility-system reporting break, or denominator composition shift that pulls the share below 91.6 percent.

Point calculation: 96.4 latest inspected value + 1.1 pp damped trend + 0.5 pp automation/compliance adjustment = 98.0 percent. Interval calculation: lower bound 98.0 - 6.4 = 91.6; upper bound 98.0 + 1.0 = 99.0 after applying the ceiling-aware cap and rounding to one decimal. The lower-side width is much larger because the 100 percent ceiling leaves only about 2.0 pp of possible upside from the point, while recent DC monthly/bi-monthly volatility includes moves as large as 7.6 pp; the chosen interval is an approximate 80% coverage band that preserves meaningful downside risk while keeping the upper tail below the mechanical maximum.

Resolution-date note: the official CMS page evidence supports the monthly release vehicle and the June 26, 2026 current update cycle, but the inspected context did not expose a future dated August 2026 state-row placeholder. I keep the forecast tied to the canonical ledger date 2026-12-15 and bind resolution to the first official CMS dataset print.

Review disposition: accepted the resolver critique by removing the same-release-day correction exception and restating first official CMS print exactly as first published; accepted the interval critique by explicitly tying the asymmetric bounds to the 100 percent ceiling, recent DC volatility, and approximate 80% coverage. Also clarified the historical sample as official-source-derived first-print observations where available and kept February 2026 labeled as latest inspected.