Code 7912: Polyglandular syndrome (including multiple endocrine neoplasia and autoimmune polyglandular syndrome) covers any condition that affects multiple glands of the endocrine system at the same time. This condition is rated on the main symptoms it causes. So, if it causes diabetes mellitus, it is rated under code 7913. Similarly, if it causes hyperthyroidism, hypothyroidism, hypoparathyroidism, Addison’s disease, or any other condition, it is rated under that condition’s code.