Hypoparathyroidism Familial Isolated 1 C5241444
An inherited form of low parathyroid hormone that affects calcium regulation. Can run in families. Managed long-term with calcium and vitamin D supplementation.
Key facts at a glance
- ICD-10
- E34.9
- ICD-11
- 5A00.0
- Body system
- endocrine
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Fatigue or weight changes
(endocrine)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Paresthesias
(neurological)Tetany
(neurological)Cataracts
(ophthalmological)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Calcium Supplementation
Oral calcium supplementation forms the cornerstone of treatment for familial isolated hypoparathyroidism type 1. Various calcium salt formulations are available with calcium citrate offering better absorption in certain patient populations.
Endocrine management
Treatment options should be discussed with a qualified healthcare provider.
Calcitriol Supplementation
Active vitamin D metabolite administration compensates for the lack of PTH-mediated 1-alpha hydroxylation of vitamin D. Dosing must be individualized based on biochemical response and tolerance.
Additional treatment options
Magnesium Supplementation
Magnesium replacement addresses the hypomagnesemia that commonly accompanies hypoparathyroidism. Magnesium deficiency can paradoxically worsen hypocalcemia and cause treatment resistance.
medicationBiochemical and Clinical Monitoring
Periodic measurement of serum calcium, phosphate, magnesium, and PTH levels ensures adequate disease control. Assessment for signs of nephrocalcinosis through imaging may be warranted with long-term therapy.
monitoringPhosphorus Restriction
Dietary modifications to reduce phosphorus intake help manage hyperphosphatemia characteristic of hypoparathyroidism. Food preparation methods such as leaching potatoes and limiting processed foods contribute to phosphorus control.
dietaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Hypoparathyroidism Familial Isolated 1 C5241444?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Shoback DM, Bilezikian JP, Bollerslev J, et al. Management of hypoparathyroidism: summary statement and guidelines from the Endocrine Society. Endocr Pract. 2021.
Sun Y, Bi J, Liu Q, Wang J. Genetics of familial isolated hypoparathyroidism: a review. Orphanet J Rare Dis. 2022.
Cincca EA, Savino F, Bertello E, et al. Long-term outcomes in familial hypoparathyroidism: a retrospective cohort study. J Bone Miner Res. 2020.
Thakker RV. The parathyroid glands and calcium homeostasis. In: Melmed S, ed. Williams Textbook of Endocrinology. 14th ed. Elsevier; 2023.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy