Updated 2026-09-06 · Prices in NZD · Recall feed checked daily
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Home › New Zealand vet costs › Hyperthyroidism, radioiodine (I-131)
🇳🇿 New Zealand · Emergency & major

Hyperthyroidism, radioiodine (I-131) cost across New Zealand

One-off radioactive iodine treatment that cures more than 95 percent of hyperthyroid cats, including the required isolation stay.

NZ$1,310–NZ$2,870national typical range (NZD)
Aucklandmost expensive city
Invercargillleast expensive city
Top 10

Where it costs most

AucklandNZ$2,340
WellingtonNZ$2,260
ChristchurchNZ$2,135
TaurangaNZ$2,090
HamiltonNZ$2,050
NelsonNZ$2,030
WhangareiNZ$2,005
DunedinNZ$1,985
NapierNZ$1,985
Palmerston NorthNZ$1,945
Save money

Ways to pay less

  • Vets normally trial methimazole for four to six weeks first, because treatment can unmask hidden kidney disease.
  • Cheaper over a cat's remaining life than years of daily tablets and monitoring.
Insurance check

Insured cats in Whangarei would get roughly NZ$1,805 of this back.

Typical plans reimburse 80–90% after the deductible, for about NZ$35–NZ$75/month for a young cat.

Southern Cross Pet Insurance quotePetCover NZ quoteRun my numbers
Full table

All 12 cities

CityTypical rangeIndex
Auckland AUKNZ$1,470–NZ$3,215
Wellington WGNNZ$1,415–NZ$3,100
Christchurch CANNZ$1,340–NZ$2,925
Tauranga BOPNZ$1,310–NZ$2,870
Hamilton WKONZ$1,285–NZ$2,815
Nelson NSNNZ$1,275–NZ$2,785
Whangarei NTLNZ$1,260–NZ$2,755
Dunedin OTANZ$1,245–NZ$2,725
Napier HKBNZ$1,245–NZ$2,725
Palmerston North MWTNZ$1,220–NZ$2,670
Rotorua BOPNZ$1,205–NZ$2,640
Invercargill STLNZ$1,180–NZ$2,585
FAQ

Questions

What is the average cost of hyperthyroidism, radioiodine (i-131) in New Zealand?

Nationally NZ$1,310–NZ$2,870 in 2026. Auckland is the most expensive city we track; Invercargill the least.

Why do prices vary so much between cities?

Rent, staff wages, equipment and competition. Big-city specialty hospitals can charge double what a rural clinic does for the same procedure.

Does pet insurance cover hyperthyroidism, radioiodine (i-131)?

Yes, on most accident-and-illness plans after the deductible.

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