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Hypothyroidism

ICD-10 E03 · Other hypothyroidism

Monitoring plan

National Institute for Health and Care Excellence (NICE) (2024) · NICE NG145
TSH adults on levothyroxine · every 3 months until stabilised, then once a year “Measure TSH every 3 months until the level has stabilised (2 similar measurements within the reference range 3 months apart), and then once a year” — NG145
Free T4 adults on levothyroxine with persisting symptoms · alongside TSH if symptoms persist “Consider measuring FT4 alongside TSH if symptoms persist despite treatment” — NG145
Free T3 children aged 2 and over · every 6 to 12 weeks until stabilisation (children 2+) “FT4 and TSH every 6-12 weeks until stabilization” — NG145

Related tests

Tests MedlinePlus lists under “Diagnosis and Tests” for this condition. A reference, not a monitoring plan: no targets and no testing schedule are implied. · MedlinePlus

Sources

Monitoring frequencies from NICE NG145.