ICD-10-CM 2027
ICD-10 code for pituitary cyst
From the official ICD-10-CM alphabetic index entry “Cyst (colloid) (mucous) (simple) (retention) › pituitary (duct) (gland)”. Page updated September 29, 2026.
About coding pituitary cyst
The ICD-10-CM code for pituitary cyst is E23.6 (Other disorders of pituitary gland).
Within E23, choose E23.6 (Other disorders of pituitary gland) only when documentation doesn't support a more specific option: hypopituitarism (E23.0), drug-induced hypopituitarism (E23.1), diabetes insipidus (E23.2), hypothalamic dysfunction, not elsewhere classified (E23.3) and disorder of pituitary gland, unspecified (E23.7).
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) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about pituitary cyst ICD-10 codes
What is the ICD-10 code for pituitary cyst?
- E23.6 — Other disorders of pituitary gland.
Is E23.6 billable?
- Yes. E23.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E23.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E23.6 as a principal diagnosis.
Is E23.6 a CC or MCC?
- No. E23.6 is neither a CC nor an MCC under MS-DRG v44.0.