Radioactive iodine treatment for cat hyperthyroidism costs $1,000-$2,000 and is considered curative, while daily medication runs $30-$60/month for life. Hyperthyroidism is the most common hormonal disorder in older cats. Treatment options range from a one-time cure to ongoing medication management, each with different costs and trade-offs.
Hyperthyroidism speeds metabolism, causing weight loss, heart damage, high blood pressure, kidney failure, and death if untreated. A benign thyroid tumor causes 95%+ of cases; affects ~10% of cats over 10. Most common hormonal disorder in older cats
Diagnosis: blood T4 test. Options: (1) I-131 injection - 95%+ cure, 1-2 weeks isolation. (2) Methimazole - controls but doesn't cure. (3) Prescription diet (Hill's y/d). (4) Thyroidectomy - less common. Radioactive iodine has a 95%+ cure rate
I-131: $1,000-$2,000 one-time. Methimazole: $30-$60/month + bloodwork ($100-$200 every 3-6 months). Prescription diet: $50-$80/month. Thyroidectomy: $800-$2,000. I-131 is the most cost-effective long-term
I-131: facility stay 3-7 days, then limited home contact 1-2 weeks, follow-up bloodwork at 1-3 months. Medication: lifelong twice-daily pills + bloodwork every 3-6 months. Monitor kidneys - treatment can unmask kidney disease. Medication requires lifelong monitoring
For I-131 (one-time cure). Medication totals $500-$1,200/year including drugs and monitoring bloodwork.
Radioactive iodine cures hyperthyroidism in over 95% of cats with a single treatment. Side effects are extremely rare.
After I-131, cats stay at the facility for 3-7 days, then have limited contact at home for 1-2 weeks.
Weight loss despite good appetite, vomiting, increased thirst, hyperactivity, rapid heart rate in an older cat (10+ years).
02/04
For I-131 (one-time cure).
Most policies cover hyperthyroidism treatment including diagnostics, medication, and I-131. It's a medical condition, not preventive care, so it falls under standard illness coverage. Both one-time I-131 and ongoing medication are covered.
Hyperthyroidism typically develops in older cats. If diagnosed before enrollment or during waiting period, thyroid treatment is permanently excluded. Enroll young - you can't switch insurers to recover coverage.
Medication costs $500-$1,200/year lifelong; I-131 is $1,000-$2,000 once. Over 3-5 years, medication exceeds I-131. Some policies have annual/per-condition limits affecting long-term coverage.
Some policies have per-condition annual limits or cover only 12 months. Since hyperthyroidism needs lifelong treatment, verify annual renewal - some stop paying after year one.
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