Healthcare

Medicare Part B & Part D late-enrollment penalties

Computes the permanent Medicare late-enrollment penalties (LEP) for delaying Part B and/or Part D without qualifying coverage. Part B adds 10% of the standard Part B premium for each full 12-month period late; Part D adds 1% of the national base beneficiary premium for each full month without creditable drug coverage — both rounded to the nearest $0.10 and paid for life. Returns the monthly, annual, and projected lifetime surcharge. Year-keyed CMS/SSA figures. Deterministic; confirm determinations with Medicare/SSA.

post/v1/medicare/late-enrollment-penalty

Request

  • Base URL: https://api.numeratica.com
  • URL: https://api.numeratica.com/v1/medicare/late-enrollment-penalty
  • Auth: one of:
    • HTTP bearer
    • API key in header X-API-Key

Request body

yearinteger

Benefit year; omit for 2026.

part_b_months_lateinteger

Months eligible but not enrolled in Part B without qualifying coverage.

part_d_months_lateinteger

Full months without creditable drug coverage (63+ day gaps).

projection_yearsinteger

Years to project the lifetime cost; omit for 20.

Response

The penalty breakdown

result_idstring
engine_versionstring
disclaimerstring

Example response

{
  "result_id": "medlep_1a2b3c4d5e6f7a8b",
  "engine_version": "medicare-lep-1.0.0"
}

Changes

No recorded changes to this operation across all 1 revision of this API.