ICD-10 code for Hyperpituitarism

The ICD-10-CM code for Hyperpituitarism is E22.9 (Hyperfunction of pituitary gland, unspecified).

Within E22, choose E22.9 (unspecified) only when documentation doesn't support a more specific option: Acromegaly and pituitary gigantism (E22.0), Hyperprolactinemia (E22.1), syndrome of inappropriate secretion of antidiuretic hormone (E22.2) and other hyperfunction of pituitary gland (E22.8).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

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.