6.2 Michigan Group Health Insurance

Key Takeaways

  • Michigan group health is layered: ERISA, the Affordable Care Act (ACA), the Michigan Insurance Code, and the Michigan HMO Act all apply.
  • Small group in Michigan = 1-50 full-time-equivalent employees; large group = 51 or more.
  • Federal COBRA applies to employers with 20+ employees; Michigan mini-COBRA covers many employers with 2-19 employees for up to 18 months.
  • COBRA durations are 18 months (termination/reduced hours) or 36 months (divorce, death, dependent aging out, Medicare entitlement), at up to 102% of the group rate.
  • Federal/state mental health parity bars stricter cost-sharing or treatment limits on behavioral health than on comparable medical/surgical benefits.
Last updated: June 2026

The Regulatory Stack

No single law governs Michigan group health; several layers apply at once, and the exam expects you to know which does what.

LawWhat it controls
ERISA (federal)Plan administration, fiduciary duties, claims/appeals for most private employer plans
ACA (federal)Essential health benefits, guaranteed issue, no pre-existing-condition exclusions, dependent coverage to age 26
COBRA (federal)Continuation for employers with 20+ employees
Michigan Insurance CodeState-regulated insured group plans, agent conduct, claim practices
Michigan HMO ActGroup coverage written through HMOs
Michigan mini-COBRAContinuation for many smaller employers not subject to federal COBRA

Self-funded employer plans are largely governed by ERISA and escape state mandates; fully insured plans must also meet Michigan Insurance Code rules. This ERISA preemption is a common distractor on the exam.

Group-Size Definitions

SegmentFull-time-equivalent (FTE) employees
Small group1-50
Large group51 or more

The 1-50 small-group line matters because small-group plans carry the strongest consumer protections:

  • Guaranteed issue — the carrier cannot decline a small employer based on the group's health.
  • Adjusted/modified community rating — premiums vary only by allowed factors (age, geography, tobacco, family size), not individual health status.
  • Essential health benefits, mental health parity, and no pre-existing-condition exclusions.

Exam tip: A 40-employee firm is a small group (guaranteed issue applies) and is above the 20-employee COBRA threshold (federal COBRA applies). Watch the two different thresholds: 50 separates small from large, and 20 separates COBRA from mini-COBRA. A stem can place one employer on both sides of these lines at once.

Worked threshold example

A Michigan retailer employs 48 full-time-equivalent workers. It is a small group (1-50), so any plan it buys must be guaranteed issue with community-style rating and essential health benefits. Because 48 exceeds 20, a departing employee gets federal COBRA (18 months for termination), not mini-COBRA. If the same firm shrank to 16 employees, the small-group protections still apply, but continuation would shift to Michigan mini-COBRA.

Continuation Coverage: COBRA vs. Michigan Mini-COBRA

COBRA (Consolidated Omnibus Budget Reconciliation Act) lets covered persons keep the group plan after a coverage-losing event. It applies to employers with 20 or more employees.

COBRA elementRule
Employer size20+ employees
PremiumUp to 102% of the full group rate (100% cost + 2% admin)
CoverageIdentical to active employees' plan
Election windowAt least 60 days from the later of notice or coverage loss

COBRA Qualifying Events and Durations

Qualifying eventContinuation period
Voluntary/involuntary termination (not gross misconduct)18 months
Reduction in hours18 months
Divorce or legal separation36 months
Death of the covered employee36 months
Dependent child loses dependent status (ages out)36 months
Employee becomes entitled to Medicare36 months (for dependents)

Mnemonic: events affecting the employee's job = 18 months; events affecting the family/dependents = 36 months.

Michigan Mini-COBRA

For employers too small for federal COBRA, Michigan's state continuation law fills the gap. It generally covers groups with about 2-19 employees, offering up to 18 months of continuation. The covered person pays roughly the group rate. Mini-COBRA is the answer whenever a stem describes a small employer (e.g., 12 employees) and asks how a departing worker keeps coverage.

Mental Health Parity

Federal and Michigan parity rules require behavioral-health benefits to be no more restrictive than comparable medical/surgical benefits.

FeatureMust be no worse than medical/surgical
Copays and coinsuranceEqual financial requirements
DeductiblesCommon or comparable
Treatment/visit limitsNo separate, stricter caps
Annual and lifetime dollar limitsNo discriminatory limits

Parity covers mental health conditions and substance-use disorders. A plan may not, for example, charge a $50 copay for a therapy visit while charging $20 for a primary-care visit.

HIPAA Portability

HIPAA bars enrollment denial based on health status, limits pre-existing-condition exclusions (now effectively eliminated by the ACA for compliant plans), provides special enrollment rights after events like marriage or birth, and protects the privacy of health information. Together these rules make group coverage portable and non-discriminatory.

Coordination of Benefits and Other Group Rules

When a person is covered by two group plans, coordination of benefits (COB) decides which pays first. The primary plan pays as if no other coverage existed; the secondary plan may cover allowable remaining charges, but total payment cannot exceed 100% of the actual expense. For dependent children covered by two working parents, the common tie-breaker is the birthday rule: the plan of the parent whose birthday falls earlier in the calendar year is primary.

Key dates to memorize

ProvisionNumber to know
COBRA election periodAt least 60 days
COBRA premium cap102% of group rate
Job-event continuation18 months
Family-event continuation36 months
Small-group ceiling50 FTEs
Mini-COBRA employer rangeabout 2-19 employees
Dependent coverage age (ACA)to age 26

Memorizing this grid lets you answer most Chapter 6 group-health questions on sight, because the exam recycles these exact thresholds in varied scenario wrappers.

Test Your Knowledge

A Michigan employer has 12 employees. A worker leaves and wants to keep the group health plan. What applies?

A
B
C
D
Test Your Knowledge

Under COBRA, which qualifying event entitles a dependent to 36 months of continuation rather than 18?

A
B
C
D
Test Your Knowledge

How is a small group defined in Michigan, and what protection follows from it?

A
B
C
D
Test Your Knowledge

What is the maximum premium a plan may charge a COBRA continuee?

A
B
C
D