Maryland Workers’ Compensation Hypertension Presumption: How § 9-503 Works

If you are a Maryland firefighter, EMT, or other public-safety worker with high blood pressure, the workers’ comp system already gives you a legal head start. Under Md. Labor & Employment § 9-503, hypertension is presumed to be a work-related occupational disease for covered first responders. That presumption shifts the burden of proof and makes the claim easier to win.

This post explains who the rule covers, what has to be proven to trigger it, how the employer can fight back, what benefits are available, and the deadlines for filing a claim from Charles County.

Who the § 9-503 Presumption Covers

Maryland law presumes hypertension is an occupational disease for many first responders. Under § 9-503(a)(1), the presumption applies to:

• Paid firefighters, fire fighting instructors, rescue squad members, and advanced life support unit members
• Sworn members of the Office of the State Fire Marshal
• Volunteer firefighters, volunteer fire fighting instructors, volunteer rescue squad members, and volunteer advanced life support unit members who are covered under § 9-234
• Paid police officers covered under § 9-503(b)
• Certain deputy sheriffs (Anne Arundel County, Baltimore City, Prince George’s County) and correctional officers (Anne Arundel County detention officers, Montgomery County, Prince George’s County), per § 9-503(b)

What Has to Be Proven

To trigger the presumption, the claimant must show three things:

1. The individual has heart disease, hypertension, or lung disease.
2. The condition results in partial or total disability, or death.
3. In the case of a volunteer, the individual passed a suitable pre-service physical examination.

For police officers and certain deputy sheriffs and correctional officers covered by § 9-503(b), an additional pre-employment medical examination is required to identify any pre-existing heart or hypertension condition.

How the Presumption Works

The presumption shifts the burden of proof. Instead of the firefighter proving the job caused the condition, the employer or insurer has to prove it did not. The Maryland Court of Special Appeals confirmed in City of Frederick v. Shankle that the presumption is rebuttable. The employer can present medical evidence and expert testimony pointing to a non-work cause, but the burden is heavy. The court called it “a formidable burden on the party against whom it operates.”

This matters in practice. Many employers fight these claims with expert witnesses who argue the condition came from genetics, diet, age, or other non-work factors. A claim can still be won, but the medical evidence has to be strong on both sides.

Filing Deadlines for Maryland Hypertension Claims

Maryland law sets clear deadlines for occupational disease claims under § 9-705 and § 9-711. Missing one of these deadlines can bar the claim entirely, regardless of the presumption. Common mistakes in Maryland workers’ comp claims include misreading these timelines:

• Notice to employer: within one year of the date the individual knew (or should have known) the disease was work-related
• Filing with the Workers’ Compensation Commission: within two years of the date of disablement
• Pulmonary dust disease: three years to file

Benefits Available

A successful claim covers:

• Lost wages. Temporary total disability pays two-thirds of the average weekly wage under § 9-621.
• Medical care. Reasonably necessary treatment, prescriptions, and equipment under § 9-660.
• Permanent disability. Calculated based on the nature and severity of the impairment.
• Death benefits. For surviving dependents in fatal cases.

The average weekly wage (AWW) under § 9-602 is calculated from gross wages over the 14 weeks before the injury or last exposure. It includes overtime and tips. A bad AWW number is one of the top reasons benefit checks come out too low. How the average weekly wage is calculated covers the details and the common miscalculations.

Frequently Asked Questions

Does Maryland law already presume hypertension is work-related for firefighters?

Yes. Under § 9-503(a)(1), high blood pressure is already presumed to be a compensable occupational disease for paid and volunteer firefighters, fire fighting instructors, rescue squad members, advanced life support unit members, and sworn members of the State Fire Marshal’s office. The condition must cause partial or total disability.

Does the § 9-503 presumption cover police officers and correctional officers?

Yes, but under a different subsection. Paid police officers, certain deputy sheriffs (Anne Arundel County, Baltimore City, Prince George’s County), and certain correctional officers (Anne Arundel County detention officers, Montgomery County, Prince George’s County) are covered under § 9-503(b). The covered conditions for police officers are heart disease and hypertension. The pre-employment medical examination requirement is stricter for this group.

Can the employer fight the presumption?

Yes. The presumption is rebuttable. The Maryland Court of Special Appeals confirmed in City of Frederick v. Shankle that an employer can present medical evidence and expert testimony showing the condition came from a non-work cause, like genetics, diet, or age. The court has described this as “a formidable burden” on the employer, but it is not insurmountable. Expect a fight on the medical evidence.

What is the deadline to file a workers’ comp claim for hypertension in Maryland?

You have one year to give notice to your employer from the date you knew (or should have known) the disease was work-related. You have two years from the date of disablement to file a claim with the Workers’ Compensation Commission, under § 9-705 and § 9-711. Pulmonary dust disease has a three-year filing window.

What benefits can I receive for a successful hypertension claim?

Temporary total disability pays two-thirds of your average weekly wage under § 9-621. Reasonably necessary medical care, prescriptions, and equipment are covered under § 9-660. Permanent disability is calculated based on the severity of the impairment. If the condition is fatal, surviving dependents may receive death benefits.

Does the presumption apply if my hypertension was diagnosed after I retired?

It can. Maryland courts have held that the § 9-503 presumption still applies if the disease manifests itself after retirement, although the further from retirement the diagnosis comes, the harder it gets to maintain the presumption practically. The presumption is not automatically lost on retirement.

How is the average weekly wage calculated in a Maryland workers’ comp claim?

Under § 9-602, the average weekly wage is calculated by averaging your gross wages over the 14 weeks before the injury or last exposure to the hazard. It includes overtime and tips. Periods of involuntary layoff or involuntary authorized absence are excluded from the 14 weeks. Housing, lodging, meals, and similar advantages provided by the employer also count. The AWW determines almost every dollar of benefits, so a bad calculation has a long tail. This is one of the most commonly disputed numbers in a workers’ comp claim.

Talk to a Charles County Workers’ Comp Lawyer

The hypertension presumption only helps if the claim is filed correctly and on time. The way the case is presented to the Commission matters, especially when the employer brings in a medical expert to fight back. Our Charles County personal injury lawyers have handled Maryland workers’ comp cases since 1993.

Call Castro Law Group at (301) 870-1200 for a confidential case review. You can also visit our workers’ compensation page to learn how we handle these claims, or our personal injury practice page for the full range of on-the-job injury cases. Call (301) 870-1200 today.