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Does pet insurance cover HCM?

By the WhichPetPlan editorial team · Last verified 2026-08-20
Short answer

HCM (hypertrophic cardiomyopathy) is an illness and hereditary heart claim, not an accident. An accident-and-illness policy can pay for new HCM diagnostics and treatment when signs first appear after enrollment and after the illness waiting period. That is not a guarantee. Every insurer we review excludes pre-existing signs: a murmur, cough, or lethargy noted before the wait ends stays excluded. Illness waits on the cat-covering plans we review run about 14 days at Lemonade, Embrace, Spot, Figo, and Pets Best, and 30 days at Trupanion. Healthy Paws covers dogs only, so it is not an option for a cat. Embrace may re-evaluate some curable conditions after 12 clean months; HCM is chronic once diagnosed and stays excluded if it showed before the policy. Accident-only policies do not cover HCM. WhichPetPlan has not published a named covers-HCM or excludes-HCM stance for any of the eight reviewed insurers. The Sphynx HCM guide and the British Shorthair page are the breed-locked companions; this page does not replace them.

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What HCM is, in insurance terms

Hypertrophic cardiomyopathy is a genetic heart condition. Our Sphynx guide describes expensive diagnostics and long-term management. Our British Shorthair page puts HCM next to obesity-linked claims as the breed-typical path. Insurers treat that as illness, hereditary, or congenital disease, not as trauma from an accident.

Accident-only pet insurance does not pay for HCM. Illness is outside that product. If the bill you are planning for is cardiac workup or heart treatment, you need accident-and-illness cover, enrolled before any murmur, cough, or lethargy is on the record.

What actually decides an HCM claim

Pre-existing signs are the usual denial. A heart murmur found on a first vet visit, a cough, or lethargy can exclude related heart claims for the life of the policy, even without a formal HCM diagnosis. That rule is on every review we publish. The Sphynx guide says you cannot wait for symptoms. The British Shorthair page says the same: enroll before a murmur or weight-related illness is noted.

Waiting periods still apply after a clean enrollment. Published illness waits on cat-covering plans are 14 days at Lemonade, Embrace, Spot, Figo, and Pets Best, and 30 days at Trupanion. Signs that appear during those windows are treated as pre-existing. Do not confuse HCM with the 6-month cruciate or hip clocks; those are a different claim path.

Healthy Paws covers dogs only. Skip it for a cat. That fact is already on the Sphynx guide, the British Shorthair page, and the Healthy Paws review.

What we can and cannot say about the eight insurers

We can say this: none of the eight reviews names HCM as a covered benefit or as a carved-out exclusion. Hereditary cover is where plans differ in general, not because we have an HCM scorecard. Coverage, when it exists, is accident-and-illness cover for a new condition after the illness wait, and it fails if signs were pre-existing.

Embrace distinguishes curable from chronic. An old ear infection can be re-evaluated after 12 consecutive symptom-free, treatment-free months. The Sphynx and British Shorthair guides both say HCM is chronic once diagnosed, so that path does not reopen a heart claim that showed before the policy. Lemonade and Trupanion use the standard exclusion for signs before enrollment or during the wait.

This page cites the Sphynx HCM blog and the British Shorthair breed page. It does not replace them, and it does not retarget those URLs. Maine Coon and Ragdoll pages on this site also flag HCM as a breed-typical claim, with the same enroll-before-signs rule.

How to give an HCM claim a chance

Enroll while the animal is young and the record is clean. Every month you wait is a month a murmur or a cough note can permanently shrink what a policy will pay. Get the vet records before you buy so you know what an insurer will point to later.

Buy accident-and-illness cover, not accident-only. Compare the actual wording on the review pages, especially hereditary and congenital language, plus the illness waiting period. Illustrative starting estimates already published on this site include about $25/mo for a British Shorthair and about $38/mo for a Sphynx. Those are starting estimates, not quotes. They rise with age, breed, and ZIP code.

Related questions

Does accident-only pet insurance cover HCM?
No. HCM is an illness and hereditary heart claim. Accident-only policies reimburse unexpected injuries only. If cardiac diagnostics or heart treatment is the bill you are planning for, you want accident-and-illness cover, enrolled before any murmur, cough, or lethargy appears.
Which pet insurance covers HCM?
We cannot name one of the eight reviewed insurers as the HCM plan. The policy-mechanics notes on our reviews do not publish a per-insurer HCM stance. Coverage, when it exists, is accident-and-illness cover for a new condition after the illness wait, and it fails if signs were pre-existing. Read the Sphynx HCM guide and the British Shorthair page rather than treating any insurer name here as a coverage guarantee.
If my cat already has a heart murmur, will insurance cover HCM?
Almost certainly not for that heart path. A murmur, cough, or lethargy is the sign insurers treat as pre-existing HCM, even without a formal diagnosis on file. A new policy can still cover unrelated new accidents and new illnesses. It will not pay to treat the heart problem already on the record.
Does pet insurance cover HCM in Sphynx and British Shorthair cats?
Same rules as any breed, with more money at stake. Sphynx cats sit in our high-risk cat tier for HCM and lifelong skin management. British Shorthairs sit in our moderate-risk cat tier for HCM and obesity-linked claims. Illustrative starting estimates are about $38/mo for a Sphynx and about $25/mo for a British Shorthair, not quotes. Enroll before symptoms, buy accident-and-illness cover, and read the hereditary wording. Those two pages stay the breed-locked walkthroughs.
Is HCM excluded as a pre-existing condition?
Yes, if any related sign appeared before enrollment or during the waiting period. That is the universal rule across Healthy Paws, Lemonade, Embrace, Trupanion, Spot, Pets Best, Figo, and Fetch. Embrace curable-condition path does not help here: HCM is chronic once diagnosed and stays excluded if it showed before the policy.
Does Healthy Paws cover HCM in cats?
Healthy Paws covers dogs only. It is not an option for a Sphynx, a British Shorthair, or any other cat. That fact is already on those breed pages and on the Healthy Paws review.

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