Key Takeaways

  • Arizona provides a 6-month open enrollment period for Medicare Supplement starting at age 65 with Part B
  • During open enrollment, insurers cannot deny coverage or charge more due to health conditions
  • Arizona does NOT have a Birthday Rule like California for annual Medigap switching
  • Guaranteed issue rights apply when losing other coverage or in specific circumstances
  • Medicare Supplement plans must be standardized using letter designations (A through N)
Last updated: January 2026

Arizona Medicare Supplement (Medigap) Regulations

Arizona has adopted federal Medicare Supplement (Medigap) regulations with standard protections for Medicare beneficiaries.

Open Enrollment Period

Arizona 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 can apply
  • Standard rates - Cannot be charged more for health conditions
  • Any plan available - Can choose any Medigap plan offered

Exam Tip: The 6-month open enrollment period is a federal requirement that Arizona follows. This is the best time to purchase Medigap coverage.

Guaranteed Issue Rights

Beyond open enrollment, Arizona 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 (conditions apply)
Medicare Advantage plan leaves areaCan purchase Medigap
Medigap insurer becomes insolventCan switch to comparable plan
Losing MedicaidCan purchase Medigap
Losing retiree coverageCan purchase Medigap within 63 days

Trial Right

If you leave Medigap for Medicare Advantage for the first time:

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

No Birthday Rule

Unlike some states (like California), Arizona does NOT have a Birthday Rule:

What This Means

  • Cannot switch Medigap plans annually without underwriting
  • After open enrollment, health questions may apply
  • Premium may be higher based on health conditions
  • Best to choose right plan during open enrollment

Switching Plans After Open Enrollment

If you want to switch Medigap plans after open enrollment:

  • May be subject to medical underwriting
  • May be denied based on health conditions
  • May face higher premiums
  • Exception: Guaranteed issue situations apply

Standardized Plans

Arizona 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

Arizona allows different rating methods for Medigap:

Rating MethodDescription
Attained AgePremiums increase with age
Issue AgePremium based on age at purchase
Community RatingSame rate regardless of age

Most Arizona insurers use attained age rating, meaning premiums increase as you get older.

Pre-Existing Condition Provisions

During open enrollment:

  • No pre-existing condition exclusions allowed

Outside open enrollment:

  • Insurers may impose up to 6-month waiting period for pre-existing conditions
  • Applies only to conditions treated within 6 months before coverage
  • Prior creditable coverage may reduce or eliminate waiting period
Test Your Knowledge

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

A
B
C
D
Test Your Knowledge

Does Arizona have a Birthday Rule that allows annual Medigap plan switching without underwriting?

A
B
C
D