Introduction: We hypothesize that intraoperative parathyroid hormone (ioPTH) measurement after a total thyroidectomy predicts children at risk for hypoparathyroidism and allow for outpatient procedure. Methods: Between 2015 and 2019, we reviewed all patients under the age of 21 undergoing a thyroidectomy (total or lobectomy). Based on the ioPTH concentration, the patients were treated by the following protocol: a) PTH ≥20 pg/mL: no treatment; b) PTH = 10–19 pg/mL: 1000 mg calcium orally TID; c) PTH = 5–9 pg/mL: calcitriol 250 μg orally BID plus 1000 mg calcium orally TID; or d) PTH <5 pg/mL calcitriol 500 μg orally BID plus 1000 mg calcium orally TID. Results: Fifty-two patients were included with a median age of 16 (range 6–21 years). Thirty-two patients (62%) had normal PTH (≥10 pg/mL) while 20 (38%) had low PTH levels (<10 pg/mL). Of those patients with low PTH, 60% had normalization of levels within 2 weeks of surgery. Conclusions: Thyroid surgery in children can be performed as an outpatient procedure. The ioPTH measurements and a protocol to treat patients with low PTH assists in safe discharge.