ICD-10-CM Section · E20-E35
Disorders of other endocrine glands
125 codes in this section
125
Total Codes
99
Billable
26
Header (Non-Billable)
15
Top-Level Codes
About Section E20-E35
Section E20-E35 (E20-E35) covers disorders of other endocrine glands. It sits within the Endocrine, nutritional and metabolic diseases chapter (E00-E89). This section contains 125 ICD-10-CM codes, 99 billable diagnoses you can submit on a claim, and 26 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in E20-E35
Grouped by 3-character root code. Click any code for full detail.
E20
Hypoparathyroidism
11 subcodes
| E20.0 | Idiopathic hypoparathyroidism | Billable |
| E20.1 | Pseudohypoparathyroidism | Billable |
| E20.8 | Other hypoparathyroidism | Header |
| E20.81 | Hypoparathyroidism due to impaired parathyroid hormone secretion | Header |
| E20.810 | Autosomal dominant hypocalcemia | Billable |
| E20.811 | Secondary hypoparathyroidism in diseases classified elsewhere | Billable |
| E20.812 | Autoimmune hypoparathyroidism | Billable |
| E20.818 | Other specified hypoparathyroidism due to impaired parathyroid hormone secretion | Billable |
| E20.819 | Hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified | Billable |
| E20.89 | Other specified hypoparathyroidism | Billable |
| E20.9 | Hypoparathyroidism, unspecified | Billable |
E21
Hyperparathyroidism and other disorders of parathyroid gland
6 subcodes
| E21.0 | Primary hyperparathyroidism | Billable |
| E21.1 | Secondary hyperparathyroidism, not elsewhere classified | Billable |
| E21.2 | Other hyperparathyroidism | Billable |
| E21.3 | Hyperparathyroidism, unspecified | Billable |
| E21.4 | Other specified disorders of parathyroid gland | Billable |
| E21.5 | Disorder of parathyroid gland, unspecified | Billable |
E22
Hyperfunction of pituitary gland
5 subcodes
| E22.0 | Acromegaly and pituitary gigantism | Billable |
| E22.1 | Hyperprolactinemia | Billable |
| E22.2 | Syndrome of inappropriate secretion of antidiuretic hormone | Billable |
| E22.8 | Other hyperfunction of pituitary gland | Billable |
| E22.9 | Hyperfunction of pituitary gland, unspecified | Billable |
E23
Hypofunction and other disorders of the pituitary gland
6 subcodes
| E23.0 | Hypopituitarism | Billable |
| E23.1 | Drug-induced hypopituitarism | Billable |
| E23.2 | Diabetes insipidus | Billable |
| E23.3 | Hypothalamic dysfunction, not elsewhere classified | Billable |
| E23.6 | Other disorders of pituitary gland | Billable |
| E23.7 | Disorder of pituitary gland, unspecified | Billable |
E24
Cushing's syndrome
7 subcodes
| E24.0 | Pituitary-dependent Cushing's disease | Billable |
| E24.1 | Nelson's syndrome | Billable |
| E24.2 | Drug-induced Cushing's syndrome | Billable |
| E24.3 | Ectopic ACTH syndrome | Billable |
| E24.4 | Alcohol-induced pseudo-Cushing's syndrome | Billable |
| E24.8 | Other Cushing's syndrome | Billable |
| E24.9 | Cushing's syndrome, unspecified | Billable |
E25
Adrenogenital disorders
3 subcodes
| E25.0 | Congenital adrenogenital disorders associated with enzyme deficiency | Billable |
| E25.8 | Other adrenogenital disorders | Billable |
| E25.9 | Adrenogenital disorder, unspecified | Billable |
E26
Hyperaldosteronism
9 subcodes
| E26.0 | Primary hyperaldosteronism | Header |
| E26.01 | Conn's syndrome | Billable |
| E26.02 | Glucocorticoid-remediable aldosteronism | Billable |
| E26.09 | Other primary hyperaldosteronism | Billable |
| E26.1 | Secondary hyperaldosteronism | Billable |
| E26.8 | Other hyperaldosteronism | Header |
| E26.81 | Bartter's syndrome | Billable |
| E26.89 | Other hyperaldosteronism | Billable |
| E26.9 | Hyperaldosteronism, unspecified | Billable |
E27
Other disorders of adrenal gland
10 subcodes
| E27.0 | Other adrenocortical overactivity | Billable |
| E27.1 | Primary adrenocortical insufficiency | Billable |
| E27.2 | Addisonian crisis | Billable |
| E27.3 | Drug-induced adrenocortical insufficiency | Billable |
| E27.4 | Other and unspecified adrenocortical insufficiency | Header |
| E27.40 | Unspecified adrenocortical insufficiency | Billable |
| E27.49 | Other adrenocortical insufficiency | Billable |
| E27.5 | Adrenomedullary hyperfunction | Billable |
| E27.8 | Other specified disorders of adrenal gland | Billable |
| E27.9 | Disorder of adrenal gland, unspecified | Billable |
E28
Ovarian dysfunction
10 subcodes
| E28.0 | Estrogen excess | Billable |
| E28.1 | Androgen excess | Billable |
| E28.2 | Polycystic ovarian syndrome | Billable |
| E28.3 | Primary ovarian failure | Header |
| E28.31 | Premature menopause | Header |
| E28.310 | Symptomatic premature menopause | Billable |
| E28.319 | Asymptomatic premature menopause | Billable |
| E28.39 | Other primary ovarian failure | Billable |
| E28.8 | Other ovarian dysfunction | Billable |
| E28.9 | Ovarian dysfunction, unspecified | Billable |
E29
Testicular dysfunction
4 subcodes
| E29.0 | Testicular hyperfunction | Billable |
| E29.1 | Testicular hypofunction | Billable |
| E29.8 | Other testicular dysfunction | Billable |
| E29.9 | Testicular dysfunction, unspecified | Billable |
E30
Disorders of puberty, not elsewhere classified
4 subcodes
| E30.0 | Delayed puberty | Billable |
| E30.1 | Precocious puberty | Billable |
| E30.8 | Other disorders of puberty | Billable |
| E30.9 | Disorder of puberty, unspecified | Billable |
E31
Polyglandular dysfunction
9 subcodes
| E31.0 | Autoimmune polyglandular failure | Billable |
| E31.1 | Polyglandular hyperfunction | Billable |
| E31.2 | Multiple endocrine neoplasia [MEN] syndromes | Header |
| E31.20 | Multiple endocrine neoplasia [MEN] syndrome, unspecified | Billable |
| E31.21 | Multiple endocrine neoplasia [MEN] type I | Billable |
| E31.22 | Multiple endocrine neoplasia [MEN] type IIA | Billable |
| E31.23 | Multiple endocrine neoplasia [MEN] type IIB | Billable |
| E31.8 | Other polyglandular dysfunction | Billable |
| E31.9 | Polyglandular dysfunction, unspecified | Billable |
E32
Diseases of thymus
4 subcodes
| E32.0 | Persistent hyperplasia of thymus | Billable |
| E32.1 | Abscess of thymus | Billable |
| E32.8 | Other diseases of thymus | Billable |
| E32.9 | Disease of thymus, unspecified | Billable |
E34
Other endocrine disorders
22 subcodes
| E34.0 | Carcinoid syndrome | Header |
| E34.00 | Carcinoid syndrome, unspecified | Billable |
| E34.01 | Carcinoid heart syndrome | Billable |
| E34.09 | Other carcinoid syndrome | Billable |
| E34.1 | Other hypersecretion of intestinal hormones | Billable |
| E34.2 | Ectopic hormone secretion, not elsewhere classified | Billable |
| E34.3 | Short stature due to endocrine disorder | Header |
| E34.30 | Short stature due to endocrine disorder, unspecified | Billable |
| E34.31 | Constitutional short stature | Billable |
| E34.32 | Genetic causes of short stature | Header |
| E34.321 | Primary insulin-like growth factor-1 (IGF-1) deficiency | Billable |
| E34.322 | Insulin-like growth factor-1 (IGF-1) resistance | Billable |
| E34.328 | Other genetic causes of short stature | Billable |
| E34.329 | Unspecified genetic causes of short stature | Billable |
| E34.39 | Other short stature due to endocrine disorder | Billable |
| E34.4 | Constitutional tall stature | Billable |
| E34.5 | Androgen insensitivity syndrome | Header |
| E34.50 | Androgen insensitivity syndrome, unspecified | Billable |
| E34.51 | Complete androgen insensitivity syndrome | Billable |
| E34.52 | Partial androgen insensitivity syndrome | Billable |
| E34.8 | Other specified endocrine disorders | Billable |
| E34.9 | Endocrine disorder, unspecified | Billable |
E35
Disorders of endocrine glands in diseases classified elsewhere
0 subcodes
Did this page help?
Quick signal so we know what to improve.
Thanks!
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Sorry to hear that.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team