ICD-10-CM 2027
ICD-10 code for pituitary gland dysfunction
From the official ICD-10-CM alphabetic index entry “Dysfunction › pituitary (gland)”. Page updated September 29, 2026.
About coding pituitary gland dysfunction
The ICD-10-CM code for pituitary gland dysfunction is E23.3 (Hypothalamic dysfunction, not elsewhere classified).
Within E23 (hypofunction and other disorders of the pituitary gland), E23.3 is specifically for hypothalamic dysfunction, not elsewhere classified. Related codes cover hypopituitarism (E23.0), drug-induced hypopituitarism (E23.1), diabetes insipidus (E23.2), other disorders of pituitary gland (E23.6) and disorder of pituitary gland, unspecified (E23.7).
Don't report E23.3 together with the conditions in its Excludes1 note: Prader-Willi syndrome (Q87.11) and Russell-Silver syndrome (Q87.19).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for E23.3)
Common questions about pituitary gland dysfunction ICD-10 codes
What is the ICD-10 code for pituitary gland dysfunction?
- E23.3 — Hypothalamic dysfunction, not elsewhere classified.
Is E23.3 billable?
- Yes. E23.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E23.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E23.3 as a principal diagnosis.
Is E23.3 a CC or MCC?
- No. E23.3 is neither a CC nor an MCC under MS-DRG v44.0.