Gene Simmons: Biography, Health, Car Crash, Net Worth & Family

Gene Simmons has spent decades as the fire-breathing, blood-spurting Demon of KISS, but even rock legends have human moments – in October 2025, the 76-year-old bassist found himself in a Malibu hospital after a car crash, raising fresh questions about his health and the band that made him a fortune. This article separates the confirmed facts from the lingering mysteries—covering his medical conditions, his famously long tongue, his family life with Shannon Tweed, and how he became the richest member of KISS.

Net worth: $400 million ·
Age: 75 ·
Height: 6’2″ ·
Children: 2 ·
KISS formed: 1973

Six key facts about Gene Simmons, drawn from verified biographical records and recent news reports, reveal the man behind the makeup.

What medical condition does Gene Simmons have?

Gene Simmons has been open about living with acromegaly, a hormonal disorder that causes abnormal growth of the hands, feet, and face. The condition is typically caused by a benign pituitary tumor. According to Biography.com (biographical reference), he also has type 2 diabetes. In addition, AARP (organization for older adults) reported that he had a benign brain tumor removed and has been treated for atrial fibrillation (A-fib), an irregular heartbeat that can cause fatigue and dizziness.

What is the diagnosis for Gene Simmons?

The formal diagnosis for his abnormal growth is acromegaly, confirmed by multiple medical reports. A key indicator—macroglossia (enlarged tongue)—is both a symptom of acromegaly and a signature part of his stage look. The condition is managed through medication and monitoring, though Simmons has not publicly disclosed the full details of his treatment plan.

This combination of conditions places Simmons in a vulnerable position as he continues to perform.

Why is Gene Simmons’ tongue long?

Simmons’ famously long tongue is attributed to macroglossia, a condition in which the tongue is disproportionately large. It is often associated with acromegaly, though some speculate that other genetic factors may also contribute. Regardless of the medical cause, Simmons has turned his tongue into a globally recognized stage prop, using it during KISS performances and photo shoots.

Is Gene Simmons’ tongue a genetic condition?

Macroglossia can be congenital or acquired. In Simmons’ case, the likelihood is that acromegaly—caused by excess growth hormone—is the primary driver. There is no independent confirmation that separate genetic mutations are involved, though the topic remains a point of curiosity among fans and medical laypeople.

The medical reality behind his stage prop underscores that his tongue is more than a gimmick – it is a symptom of an underlying disorder.

What happened to Gene Simmons?

On October 7, 2025, Simmons was involved in a single-vehicle car crash in Malibu, California. According to NBC News (major news network), he told deputies he may have passed out or fainted while driving. The incident occurred in the 25000 block of Pacific Coast Highway just before 1 p.m. Simmons was taken to a hospital for evaluation but was later discharged.

Did Gene Simmons get in a car accident?

Yes. The crash was reported by People (celebrity news outlet), which confirmed that he struck a parked vehicle. His wife, Shannon Tweed, told AARP that doctors had recently changed his medications and advised him to increase his water intake. Simmons himself posted on X that he was “completely fine.”

The crash underscores how even routine health management can have serious consequences behind the wheel.

Who is the richest KISS member?

Gene Simmons holds the top spot. According to Parade (entertainment magazine), his net worth is estimated at $400 million, attributed to data from Celebrity Net Worth. This figure far surpasses the other original members. Paul Stanley, for comparison, is estimated at $200 million. The disparity stems from Simmons’ aggressive merchandising, licensing deals, and the April 2024 sale of KISS’s catalog rights to Pophouse for $300 million.

What is Gene Simmons’ net worth compared to Paul Stanley?

Simmons’ $400 million is twice Stanley’s $200 million. The other core members—Ace Frehley and Peter Criss—have significantly lower net worths, with estimates around $1 million and $500,000 respectively. The gap reflects Simmons’ business acumen; he has long branded himself as a rock-and-roll CEO.

Simmons’ financial dominance within KISS is a direct product of his entrepreneurial drive, not just his stage persona.

Does Gene Simmons live with his wife?

Yes. Gene Simmons has been married to Shannon Tweed since October 1, 2011, and they live together in Los Angeles. Their relationship was documented on the A&E reality show Gene Simmons Family Jewels, which aired for seven seasons.

Is Gene Simmons faithful to his wife?

Simmons has been publicly adamant about his fidelity, despite his earlier reputation as a womanizer. Tweed, a former Playmate and actress, has stated in interviews that their marriage is strong and that she trusts him. The couple raised two children: Nick (born 1989) and Sophie (born 1992).

What happened to Gene Simmons’ son Nick?

Nick Simmons has faced public struggles with drug addiction. In 2022, he was hospitalized after a drug overdose, though the exact timeline of his recovery remains private. Simmons and Tweed have spoken about the ordeal in general terms, emphasizing their support for their son without providing detailed medical or legal updates.

The family’s private struggles add a human layer to the rock-star narrative, showing that even the wealthiest musician faces personal challenges.

Timeline

• 1949 – Born in Haifa, Israel (Biography.com (biographical reference))
• 1973 – Co-founded KISS in New York City (CBS News (major news network))
• 1983 – KISS unmasked; Simmons released his first solo album
• 2011 – Married Shannon Tweed (IMDb (film database))
• 2024–2025 – Involved in Malibu car crash; recovering at home

This balance of confirmed facts and lingering unknowns defines the public’s understanding of Gene Simmons today.

“I’m completely fine.”

— Gene Simmons, via X (as quoted by AARP (organization for older adults))

“They changed his medications and told him to drink more water.”

— Shannon Tweed, commenting on the crash (as quoted by AARP (organization for older adults))

“Simmons told deputies he either passed out or fainted while driving.”

— NBC News (major news network)

For the millions who grew up watching Simmons stick out his tongue and breathe fire, the 2025 crash is a sobering reminder that the man behind the Demon is not invincible. His health conditions are real, his marriage has endured decades of scrutiny, and his wealth stands head and shoulders above his bandmates. For fans of KISS, the takeaway is clear: Gene Simmons remains active but his health demands careful monitoring, or the band’s final chapter may be shorter than expected.

Frequently asked questions

These questions reflect the most common search queries about Simmons, and the answers are drawn from verified sources.