[hua7450]

Part of #9734. Stacked on #10373. The base branch stack/pr-10373 points to its synced head eb50e2e02a; this PR contains only the follow-up fixes. Retarget to main after #10373 merges.

What and why

A West Virginia applicant with an ineligible spouse and no deemed income could receive the SSI couple standard merely because they were married. Use the existing SSI spouse-eligibility and deeming calculations to select the individual or couple standard for community applicants. A 70-year-old with $1,400 monthly countable income and a younger spouse with no income is now compared with $994, rather than $1,491, in 2026.

North Dakota's medically needy category flags excluded seniors and disabled people, and the category formula omitted blind-only applicants. Enable the supported aged, blind, and disabled coverage and update the existing monthly income tables to $1,174/$1,587 from April 1, 2025 and $1,197/$1,623 from April 1, 2026. The $995-monthly-income senior and an aged couple above the SSI rate now retain Medicaid through medically needy coverage.

Policy sources and scope

• WV Income Maintenance Manual §§3.17 and 4.14 — #page 383-385,665: needs-group size and spousal deeming. This fix addresses community applicants; the separate long-term-care rules are outside this change.
• N.D.A.C. 75-02-02.1-05(3)(e) and archived ND coverage manual: non-SSI aged, blind, or disabled coverage, including support before 2015.
• ND income levels effective April 2025 and current ND income levels: published individual and couple amounts.

The existing annual medically needy formula reads standards at the start of its calculation period. Calendar 2026 therefore uses the April 2025 amounts; rolling-year cases beginning in April 2026 exercise the new 2026 amounts. The actual effective dates are preserved. Earlier income values remain unchanged.

ND's optional non-SSI pathway remains with #10361's separate scope.

Test plan

• 107 targeted YAML tests pass across the five affected variable test files.

• All 81 existing SSI-rate property tests pass.

• Regression check: 12 added cases fail against the synced Use the SSI rate as the Medicaid aged/disabled income limit in West Virginia and North Dakota #10373 parent and pass with these fixes.

• Policy expectations come from the official sources above; cases cover spouse eligibility/deeming, mixed states, ND aged/disability/blindness, income boundaries, the March/April effective-date boundary, and final Medicaid eligibility.

• Source-conflict register: not applicable; no conflicting-source reading is taken.

• make format

• Changelog fragment in changelog.d/

No partner test files changed. No CI monitoring, full-suite run, or dataset microsimulation was performed.

axiom: needed