E20-E35: Disorders of other endocrine glands
E21: Hyperparathyroidism and other disorders of parathyroid gland
Hyperparathyroidism and other disorders of the parathyroid gland refer to conditions related to overactive or underactive parathyroid glands. Located in the neck, these four small glands produce parathyroid hormone (PTH), which helps control the amount of calcium in your body. If these glands produce too much PTH, it's called hyperparathyroidism. This can result in high calcium levels in the blood and urine, causing kidney stones, bone disease, and other symptoms like fatigue, depression, and memory issues. Conversely, if they make too little PTH, it's called hypoparathyroidism, leading to low calcium and high phosphorus levels in the blood. This can result in muscle cramps, spasms, and tingling in the hands and feet. These conditions can be triggered by factors like gland tumors, neck surgery, radiation treatment, or certain genetic disorders. They typically progress gradually and affect the skeletal, renal, and nervous systems.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.