Understanding The Difference Between MHD and LMHD – And Why It Matters For Employers And Employees Alike
For global employers, health insurance is one of the most critical employee benefits you provide. It’s also one of the most complex. A common area of misunderstanding is around MHD (Medical History Disregarded) underwriting – and its less generous counterpart, LMHD (Limited Medical History Disregarded).
At first glance, both look similar. But the difference can mean the world to an employee with a serious health history – and to the employer trying to recruit and retain them.
First Things First: What Is Underwriting?
Underwriting is the process insurers use to decide what risk they are taking on, and what coverage terms apply. In health insurance, it determines whether pre-existing medical conditions are covered, excluded, or subject to special conditions.
The main types of underwriting employers will see are:
- Full Medical Underwriting (FMU): Every employee must complete a health questionnaire. Pre-existing conditions are usually excluded.
- Moratorium Underwriting: No questionnaires at joining, but pre-existing conditions are excluded for a set period (often two years).
- MHD (Medical History Disregarded): All pre-existing conditions are covered, with no exclusions based on health history.
- LMHD (Limited MHD): A restricted version of MHD, where some pre-existing conditions are covered, but serious or costly ones may be excluded.
What Does MHD Actually Mean?
Medical History Disregarded (MHD) underwriting means:
- Pre-existing conditions are covered, provided they fall within the plan’s standard benefits.
- No medical questionnaire is required when employees (and dependents) join.
- For large groups, it’s the gold standard.
What Is LMHD?
Limited Medical History Disregarded (LMHD) may sound similar, but the “limited” makes all the difference:
- Only some pre-existing conditions are covered.
- Serious or costly conditions – such as cancer, major heart disease, or complex autoimmune disorders – may be excluded.
- Insurers may still require medical disclosure in certain cases, despite the “MHD” label.
Why This Matters for Employers
Recruitment Risk Imagine you’ve just secured a fantastic candidate. Then they disclose they’re in remission from cancer, or had a heart attack in the past year. If your plan is LMHD, they may not be covered — putting the hire, and your reputation, at risk.
Employee Trust Employees who believe they have “full cover” will feel misled if claims are later rejected. This undermines confidence in both the benefit and the employer.
Unexpected Costs Gaps in coverage can expose staff to significant medical bills – and in some cases, employers step in to help, creating unbudgeted costs.
Best Practices for Employers
Clarify the wording. Don’t rely on sales language; review the actual contract to see if it’s MHD or LMHD.
Get written confirmation. If a candidate or employee has a serious medical history, ask the insurer (via your broker) for written assurance about coverage.
Don’t assume. Just because your plan mentions “MHD” doesn’t mean it’s the full version.
Work with the right broker. A strong broker will handle communications discreetly with candidates, manage medical reports securely, and push insurers for black-and-white clarity.
Bottom Line: LMHD is Not the Same As MHD
LMHD is not the same as MHD. The difference can determine whether an employee with a history of cancer, a recent heart attack, or a chronic condition is fully covered – or excluded.
In today’s competitive talent market, no employer can afford to get this wrong. Ensuring you truly have MHD coverage – and understanding the difference between MHD and LMHD – isn’t just about benefits administration. It’s about protecting your people, avoiding surprises, and demonstrating your commitment to staff wellbeing.
At One World Cover, we help global employers cut through the jargon, confirm what their policies really cover, and secure the clarity their people deserve.
To learn more please get in touch: [email protected] or click here to contact us.
