Cost of Radioactive Iodine Therapy
Radioactive iodine therapy is a one-off treatment for an overactive thyroid or, in selected cases, thyroid cancer. It is usually given as a single dose, so the cost is concentrated into one episode of care.
This page explains what the fee covers and what to budget for afterwards.
Last medically reviewed: 15 November 2025
What the cost includes
The fee typically covers the radioactive iodine dose itself, the nuclear medicine team, and any radiation-safety monitoring during the visit. It may also include the pre-treatment assessment.
Because the dose is individualised, the cost can vary with the amount of radioactivity required and the facility providing it.
Costs before and after
Before treatment you may need blood tests, and sometimes a thyroid uptake scan or pregnancy test — these are usually charged separately.
After treatment, most people need levothyroxine and regular thyroid function tests. For thyroid cancer, follow-up also includes ultrasound and thyroglobulin testing, which add to the longer-term cost.
Is it worth the cost?
For many patients, radioactive iodine offers a definitive, one-off treatment that avoids long-term antithyroid tablets or major surgery. Your specialist can weigh the cost against the alternatives for your situation.
Frequently asked questions
How much does radioactive iodine cost?
The price depends on the dose required and the facility. Ask the nuclear medicine department for a full quote covering the dose and any monitoring.
Are there follow-up costs?
Yes — most patients need levothyroxine and periodic blood tests afterwards, and thyroid cancer follow-up adds ultrasound and thyroglobulin testing.
Is radioactive iodine a one-off treatment?
Usually yes. A single dose controls an overactive thyroid in most cases, though a minority of patients need a second dose.
References & further reading
This page is based on established medical knowledge and guidelines from authoritative sources. Always consult a qualified clinician for personal medical advice.
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