Disorders of other endocrine glands (E20-E35)

Instructional notes

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers diabetes mellitus coding, including type, insulin and drug use, pump malfunction and secondary diabetes, plus obesity and obesity class codes.

• Diabetes mellitus (page 39)
• Obesity (page 42)

Read Section I.C.4 (page 39)

All codes under E20-E35

E20-E35 can't be used on a claim. Pick a billable code below; grey headings group them.

• E20Hypoparathyroidism
• E20.0Idiopathic hypoparathyroidism
• E20.1Pseudohypoparathyroidism
• E20.8Other hypoparathyroidism
• E20.81Hypoparathyroidism due to impaired parathyroid hormone secretion
• E20.810Autosomal dominant hypocalcemia
• E20.811Secondary hypoparathyroidism in diseases classified elsewhere
• E20.812Autoimmune hypoparathyroidism
• E20.818Other specified hypoparathyroidism due to impaired parathyroid hormone secretion
• E20.819Hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified
• E20.89Other specified hypoparathyroidism
• E20.9Hypoparathyroidism, unspecified
• E21Hyperparathyroidism and other disorders of parathyroid gland
• E21.0Primary hyperparathyroidism
• E21.1Secondary hyperparathyroidism, not elsewhere classified
• E21.2Other hyperparathyroidism
• E21.3Hyperparathyroidism, unspecified
• E21.4Other specified disorders of parathyroid gland
• E21.5Disorder of parathyroid gland, unspecified
• E22Hyperfunction of pituitary gland
• E22.0Acromegaly and pituitary gigantism
• E22.1Hyperprolactinemia
• E22.2Syndrome of inappropriate secretion of antidiuretic hormone
• E22.8Other hyperfunction of pituitary gland
• E22.9Hyperfunction of pituitary gland, unspecified
• E23Hypofunction and other disorders of the pituitary gland
• E23.0Hypopituitarism
• E23.1Drug-induced hypopituitarism
• E23.2Diabetes insipidus
• E23.3Hypothalamic dysfunction, not elsewhere classified
• E23.6Other disorders of pituitary gland
• E23.7Disorder of pituitary gland, unspecified
• E24Cushing's syndrome
• E24.0Pituitary-dependent Cushing's disease
• E24.1Nelson's syndrome
• E24.2Drug-induced Cushing's syndrome
• E24.3Ectopic ACTH syndrome
• E24.4Alcohol-induced pseudo-Cushing's syndrome
• E24.8Other Cushing's syndrome
• E24.9Cushing's syndrome, unspecified
• E25Adrenogenital disorders
• E25.0Congenital adrenogenital disorders associated with enzyme deficiency
• E25.8Other adrenogenital disorders
• E25.9Adrenogenital disorder, unspecified
• E26Hyperaldosteronism
• E26.0Primary hyperaldosteronism
• E26.01Conn's syndrome
• E26.02Glucocorticoid-remediable aldosteronism
• E26.09Other primary hyperaldosteronism
• E26.1Secondary hyperaldosteronism
• E26.8Other hyperaldosteronism
• E26.81Bartter's syndrome
• E26.89Other hyperaldosteronism
• E26.9Hyperaldosteronism, unspecified
• E27Other disorders of adrenal gland
• E27.0Other adrenocortical overactivity
• E27.1Primary adrenocortical insufficiency
• E27.2Addisonian crisis
• E27.3Drug-induced adrenocortical insufficiency
• E27.4Other and unspecified adrenocortical insufficiency
• E27.40Unspecified adrenocortical insufficiency
• E27.49Other adrenocortical insufficiency
• E27.5Adrenomedullary hyperfunction
• E27.8Other specified disorders of adrenal gland
• E27.9Disorder of adrenal gland, unspecified
• E28Ovarian dysfunction
• E28.0Estrogen excess
• E28.1Androgen excess
• E28.2Polycystic ovarian syndrome
• E28.3Primary ovarian failure
• E28.31Premature menopause
• E28.310Symptomatic premature menopause
• E28.319Asymptomatic premature menopause
• E28.39Other primary ovarian failure
• E28.8Other ovarian dysfunction
• E28.9Ovarian dysfunction, unspecified
• E29Testicular dysfunction
• E29.0Testicular hyperfunction
• E29.1Testicular hypofunction
• E29.8Other testicular dysfunction
• E29.9Testicular dysfunction, unspecified
• E30Disorders of puberty, not elsewhere classified
• E30.0Delayed puberty
• E30.1Precocious puberty
• E30.8Other disorders of puberty
• E30.9Disorder of puberty, unspecified
• E31Polyglandular dysfunction
• E31.0Autoimmune polyglandular failure
• E31.1Polyglandular hyperfunction
• E31.2Multiple endocrine neoplasia [MEN] syndromes
• E31.20Multiple endocrine neoplasia [MEN] syndrome, unspecified
• E31.21Multiple endocrine neoplasia [MEN] type I
• E31.22Multiple endocrine neoplasia [MEN] type IIA
• E31.23Multiple endocrine neoplasia [MEN] type IIB
• E31.8Other polyglandular dysfunction
• E31.9Polyglandular dysfunction, unspecified
• E32Diseases of thymus
• E32.0Persistent hyperplasia of thymus
• E32.1Abscess of thymus
• E32.8Other diseases of thymus
• E32.9Disease of thymus, unspecified
• E34Other endocrine disorders
• E34.0Carcinoid syndrome
• E34.00Carcinoid syndrome, unspecified
• E34.01Carcinoid heart syndrome
• E34.09Other carcinoid syndrome
• E34.1Other hypersecretion of intestinal hormones
• E34.2Ectopic hormone secretion, not elsewhere classified
• E34.3Short stature due to endocrine disorder
• E34.30Short stature due to endocrine disorder, unspecified
• E34.31Constitutional short stature
• E34.32Genetic causes of short stature
• E34.321Primary insulin-like growth factor-1 (IGF-1) deficiency
• E34.322Insulin-like growth factor-1 (IGF-1) resistance
• E34.328Other genetic causes of short stature
• E34.329Unspecified genetic causes of short stature
• E34.39Other short stature due to endocrine disorder
• E34.4Constitutional tall stature
• E34.5Androgen insensitivity syndrome
• E34.50Androgen insensitivity syndrome, unspecified
• E34.51Complete androgen insensitivity syndrome
• E34.52Partial androgen insensitivity syndrome
• E34.8Other specified endocrine disorders
• E34.9Endocrine disorder, unspecified
• E35Disorders of endocrine glands in diseases classified elsewhere

E20-E35 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.