Maryland Senate Bill 90, signed into law during the 2026 General Assembly session, takes effect October 1 and does something no prior Maryland first-responder presumption has done: it collapses both proof burdens simultaneously. A paid firefighter with at least two years of service, a physician-confirmed hypertension diagnosis, and 90 consecutive days of prescribed medication is now presumed both to have acquired hypertension occupationally and to be disabled by it. Prior law required proving each prong separately.
That structural shift matters because hypertension is not a rare condition like Parkinson’s or cancer. Per International Association of Fire Fighters (IAFF) occupational health data, 20 to 35 percent of active firefighters carry a hypertension diagnosis, making this the highest-frequency condition any first-responder presumption statute has ever reached.
Who it affects
Self-insured Maryland counties, municipalities, and fire districts are the primary audience. If your jurisdiction employs paid firefighters, October 1 is an actuarial deadline, not just a legal effective date. Approximately 41 days remain to identify open hypertension claims, assess case reserve adequacy, and recalibrate IBNR before the law changes the adjudication standard.
Mixed departments, those with both career and volunteer staff, need workforce-segmentation work now. SB 90 covers only paid, currently employed firefighters. Volunteers and retired personnel remain subject to traditional disablement standards. Blending both populations in a single reserve analysis will obscure the frequency effect on the paid segment.
Reserve mechanism
The impact runs through frequency and severity simultaneously.
Frequency increases because the dual presumption converts contested and denied claims into compensable ones. If 25 percent of eligible firefighters carry hypertension diagnoses and half of those previously failed the disablement proof hurdle, the effective compensable-claim population roughly doubles for that condition. Historical claim counts before October 1 cannot anchor an unbiased expected frequency for the post-presumption period.
Severity increases because claims that settled under the prior “demonstrate disablement” standard at moderate indemnity levels now carry automatic disablement status. Long-duration hypertension management (ongoing medication, periodic cardiovascular monitoring, potential complication episodes) extends both the medical and the indemnity tail. Development triangles built on a universe of claims that required proof of disability will systematically understate future emergence as the easier-to-prove population grows.
Claims currently in negotiation or litigation are a specific case-reserve problem. If a hypertension claim is pending dispute resolution before October 1, the claimant’s leverage increases materially on the effective date. Employers should identify every open hypertension claim now, assess the current case reserve against the new presumption standard, and complete case reserve strengthening before October 1.
Where this shows up in your reserves
The effect surfaces in two places in the actuarial report. First, the expected claim frequency underlying the a priori expected loss ratio in Bornhuetter-Ferguson picks for the firefighter WC segment: if your actuary is using pre-presumption historical frequency as the a priori, the BF reserve understates the liability from day one. Second, the development factors applied to open hypertension claims in the case-adequacy section of the reserve study. For background on workers’ compensation IBNR structure, the Learn explainer covers how frequency assumptions feed into each of the five core methods.
Maryland’s pattern follows the template laid out in Colorado’s SB 184 Parkinson’s presumption, the Arizona cancer presumption expansion, and Virginia’s PTSD law for first responders, all of which produced measurable frequency increases in the first two policy years. Hypertension, covering 20 to 35 percent of the active workforce versus roughly 1 to 5 percent for cancer and under 1 percent for Parkinson’s, should be expected to produce a larger frequency effect than any prior presumption enacted this decade.
What this means for your next review
Put this on the agenda before October 1, not after:
- Identify every open WC claim in the firefighter workforce where hypertension or cardiovascular disease is noted, contested, or pending, and audit case reserve adequacy against the new disablement presumption standard.
- Ask your actuary whether the expected loss ratio underlying your IBNR for the firefighter segment has been updated to reflect the frequency shift, or whether it still anchors on pre-presumption historical development.
- Segment paid and volunteer firefighter populations separately for reserve purposes if you operate a mixed department. The presumption applies to one group; the prior standard still governs the other.