ICD Code E02

ICD code E02 is subclinical iodine-deficiency hypothyroidism, which refers to a mild form of underactive thyroid function caused by insufficient iodine, where symptoms may not be obvious but laboratory tests show abnormal thyroid hormone levels.

1. Presence of elevated thyroid-stimulating hormone (TSH) levels above the reference range

2. Normal free thyroxine (T4) levels within the reference range

3. Absence of overt clinical symptoms of hypothyroidism

4. Evidence or suspicion of iodine deficiency based on dietary history, geographic location, or laboratory assessment

5. No alternative cause for abnormal thyroid function identified

6. Patient does not meet criteria for overt hypothyroidism

Relevant CPT codes that may be used to treat ICD code E02 include:

- 84443 (Thyroid stimulating hormone [TSH])

- 84436 (Thyroxine; total)

- 84439 (Thyroxine; free)

- 84479 (Thyroid hormone [T3 or T4] uptake or thyroid hormone binding ratio)

- 83036 (Hemoglobin A1c, if monitoring related metabolic conditions)

- 99202–99215 (Evaluation and management services, new or established patient)

- 96372 (Therapeutic, prophylactic, or diagnostic injection; subcutaneous or intramuscular, if medication administration is required)

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