ICD-10-CM 2027
ICD-10 code for autosomal dominant hypocalcemia
From the official ICD-10-CM alphabetic index entry “Hypocalcemia › autosomal dominant”. Page updated September 29, 2026.
About coding autosomal dominant hypocalcemia
The ICD-10-CM code for autosomal dominant hypocalcemia is E20.810 (Autosomal dominant hypocalcemia). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E20.810.
Within E20.81 (hypoparathyroidism due to impaired parathyroid hormone secretion), E20.810 is specifically for autosomal dominant hypocalcemia. Related codes cover secondary hypoparathyroidism in diseases classified elsewhere (E20.811), autoimmune hypoparathyroidism (E20.812), other specified hypoparathyroidism due to impaired parathyroid hormone secretion (E20.818) and unspecified (E20.819).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044), DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific autosomal dominant hypocalcemia codes (official index)
Common questions about autosomal dominant hypocalcemia ICD-10 codes
What is the ICD-10 code for autosomal dominant hypocalcemia?
- E20.810 — Autosomal dominant hypocalcemia. More specific codes apply when the documentation supports them: E20.810, E20.810.
What is the ICD-10 code for type 1 autosomal dominant hypocalcemia?
- E20.810 — Autosomal dominant hypocalcemia.
What is the ICD-10 code for type 2 autosomal dominant hypocalcemia?
- E20.810 — Autosomal dominant hypocalcemia.
Is E20.810 billable?
- Yes. E20.810 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E20.810 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E20.810 as a principal diagnosis.
Is E20.810 a CC or MCC?
- No. E20.810 is neither a CC nor an MCC under MS-DRG v44.0.