A Registry for Patients With Chronic Hypoparathyroidism

Inclusion Criteria:

1. Participants diagnosed with chronic hypoparathyroidism, ie, hypoparathyroidism with a
duration of longer than 6 months, including:

1. Adult participants (greater than or equal to [>=] 18 years of age) who are receiving
for chronic hypoparathyroidism any of the following options: standard therapy,
standard therapy plus rhPTH(1-84), or rhPTH(1-84) therapy alone.

2. Pediatric participants (less than [<] 18 years of age) who are receiving for chronic
hypoparathyroidism any of the following options: standard therapy, standard therapy
plus rhPTH(1-84), or rhPTH(1-84) therapy alone.

Exclusion Criteria:

1. Participants or legally acceptable representatives unable to provide informed consent.

2. Participants using rhPTH(1-34) or used rhPTH(1-34) for more than 2 years and in the
last 3 months.

3. Participants currently enrolled in an interventional clinical study (whether or not
the study is related to hypoparathyroidism). Note that this does not include
participants enrolled in other observational registries.

4. History of hypoparathyroidism resulting from a known activating mutation in the CaSR
gene.

5. History of hypoparathyroidism resulting from impaired responsiveness to PTH
(pseudohypoparathyroidism).