ICD-10 Code for Hypoparathyroidism
The ICD-10-CM code for hypoparathyroidism is E20.9 — Hypoparathyroidism, unspecified. This is the code the Alphabetic Index gives for hypoparathyroidism with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
E20.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which hypoparathyroidism code should you use?
The Alphabetic Index lists 9 codes under Hypoparathyroidism. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| autoimmune | E20.812 | Autoimmune hypoparathyroidism | |
| due to impaired parathyroid hormone secretion, unspecified | E20.819 | Hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified | |
| familial | E20.89 | Other specified hypoparathyroidism | |
| idiopathic | E20.0 | Idiopathic hypoparathyroidism | |
| neonatal, transitory | P71.4 | Transitory neonatal hypoparathyroidism | |
| postprocedural | E89.2 | Postprocedural hypoparathyroidism | |
| secondary, in diseases classified elsewhere | E20.811 | Secondary hypoparathyroidism in diseases classified elsewhere | |
| specified NEC | E20.89 | Other specified hypoparathyroidism |
Hypoparathyroidism familial
| isolated | E20.818 | Other specified hypoparathyroidism due to impaired parathyroid hormone secretion |
Hypoparathyroidism specified NEC
| due to impaired parathyroid hormone secretion | E20.818 | Other specified hypoparathyroidism due to impaired parathyroid hormone secretion |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources