Key Takeaways

  • Indiana requires a 6-month open enrollment period for Medicare Supplement starting at age 65
  • Guaranteed issue rights apply during open enrollment and specific triggering events
  • Indiana prohibits pre-existing condition waiting periods during open enrollment
  • Medicare Supplement plans must be standardized (Plans A through N)
  • Insurers can use attained-age or issue-age rating in Indiana
Last updated: January 2026

Indiana Medicare Supplement (Medigap) Regulations

Indiana has adopted standard protections for Medicare beneficiaries purchasing Medicare Supplement (Medigap) insurance.

Open Enrollment Period

Indiana provides a 6-month open enrollment period for Medicare Supplement:

When It Begins

The 6-month period starts:

  • First day of the month you are 65 or older AND
  • Enrolled in Medicare Part B

Protections During Open Enrollment

  • Guaranteed issue - Must be accepted regardless of health
  • No pre-existing condition exclusions
  • Standard rates - Cannot be charged more for health conditions
  • Any plan available - Can choose any Medigap plan A through N

Exam Tip: The 6-month open enrollment period is critical - it's the only time guaranteed issue is automatically available to all eligible persons.

Guaranteed Issue Rights

Beyond open enrollment, Indiana provides guaranteed issue rights in specific situations:

Triggering Events

EventGuaranteed Issue Right
Losing employer coverageCan purchase Medigap within 63 days
Leaving Medicare AdvantageCan return to Medigap within 63 days
Medicare Advantage plan leaves areaCan purchase Medigap
Medigap insurer becomes insolventCan switch to comparable plan
Losing MedicaidCan purchase Medigap

Trial Right

If you leave Medigap for Medicare Advantage:

  • Have 12 months to decide
  • Can return to previous Medigap plan
  • Or any plan from same insurer
  • Guaranteed issue, no health questions

Standardized Plans

Indiana requires Medigap plans to be standardized:

Available Plans

PlanBenefits
Plan ABasic benefits only
Plan BBasic + Part A deductible
Plan CComprehensive (pre-2020 only)
Plan DSimilar to C, no Part B excess
Plan FMost comprehensive (pre-2020 only)
Plan GLike F without Part B deductible
Plan K50% cost sharing, out-of-pocket max
Plan L75% cost sharing, out-of-pocket max
Plan M50% Part A deductible
Plan NCost sharing, copays for visits

Note: Plans C and F are only available to those eligible for Medicare before January 1, 2020.

Rate Regulation

Indiana allows different rating methods for Medigap:

  • Attained age rating permitted (premiums increase with age)
  • Issue age rating also permitted
  • Rate increases must be filed with IDOI
  • Cannot discriminate based on health during open enrollment

Pre-Existing Condition Rules

Outside of open enrollment:

SituationPre-Existing Waiting Period
Open EnrollmentNo waiting period
Guaranteed IssueNo waiting period
Outside bothUp to 6 months may apply

Insurers may impose up to a 6-month look-back period for pre-existing conditions, but:

  • Cannot apply during open enrollment
  • Cannot apply during guaranteed issue situations
  • Prior creditable coverage reduces waiting period
Test Your Knowledge

How long is the open enrollment period for Medicare Supplement in Indiana?

A
B
C
D
Test Your Knowledge

When can an insurer impose a pre-existing condition waiting period for Medigap in Indiana?

A
B
C
D