ICD-10 code for pancreatic islet cells hyperplasia

The ICD-10-CM code for pancreatic islet cells hyperplasia is E16.9 (Disorder of pancreatic internal secretion, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E16.9.

Within E16, choose E16.9 (Disorder of pancreatic internal secretion, unspecified) only when documentation doesn't support a more specific option: drug-induced hypoglycemia without coma (E16.0), other hypoglycemia (E16.1), hypoglycemia, unspecified (E16.2), increased secretion of glucagon (E16.3), increased secretion of gastrin (E16.4), other specified disorders of pancreatic internal secretion (E16.8) and hypoglycemia level (E16.A).

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.