5 BILLS TRACKED
Cat hyperthyroidism treatment
An overactive thyroid is common in older cats. Costs range from lifelong daily tablets to a one-off radioiodine cure.
Every price we track (hover a dot)
| Year | Region | Practice | What it was | List | Paid | Src |
|---|---|---|---|---|---|---|
| 2026 | UK unspecified | Independent / charity | Radioactive iodine extended stayadditional per-day fee inc VAT for stays beyond the included 14 days | £34 | — | source |
| 2026 | UK unspecified | Unknown | Felimazole/methimazole tabletsper month at vet practice, quoted range GBP20-35; lifelong daily medication; online Rx can cut 40-60 percent | £35 | — | source |
| 2026 | UK unspecified | Unknown | Blood test plus consultation monitoringper monitoring visit, range GBP100-170; every 3 months during stabilisation then every 6 months | £170 | — | source |
| 2026 | UK unspecified | Unknown | Radioactive iodine (I-131) treatmentone-off curative treatment, quoted range GBP1500-2500 inc 1-3 week specialist stay | £2,500 | — | source |
| 2026 | UK unspecified | Independent / charity | Radioactive iodine (I-131) treatmentone-off curative treatment inc VAT; up to 14 days stay; includes pre-treatment bloods and 6-month monitoring | £3,400 | — | source |
Common questions
How much does hyperthyroidism cost in the UK?
Across 5 real UK prices, the median is £170, with bills running from £34 to £3,400. These are real prices people paid or that practices published, not estimates.
Why do hyperthyroidism prices vary so much?
It depends on where you are, who owns the practice, and exactly what is included. The Competition and Markets Authority found corporate-owned practices charged 18.3% more on average than independents, and vet prices rose 63% between 2016 and 2023.
Is hyperthyroidism cheaper at an independent vet?
Often, yes. The CMA's 2026 review found independent practices averaged 18.3% less than the six large corporate groups for comparable work. From September 2026 every practice must publish a price list, so comparing a few nearby is worth it.
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Methodology: prices here are published list prices, bills people reported in public posts or submitted directly, and survey averages. Each row says which it is, with a link to the source where one exists. We never estimate and no sponsor can touch a number. Spot an error? Tell us and we'll fix or remove it fast.