E77.9Disorder of glycoprotein metabolism, unspecified

E77.9 is the ICD-10-CM diagnosis code for disorder of glycoprotein metabolism, unspecified. It belongs to category E77 (disorders of glycoprotein metabolism), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E77, choose E77.9 (Disorder of glycoprotein metabolism, unspecified) only when documentation doesn't support a more specific option: defects in post-translational modification of lysosomal enzymes (E77.0), defects in glycoprotein degradation (E77.1) and other disorders of glycoprotein metabolism (E77.8).

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 642 (Inborn and Other Disorders of Metabolism, relative weight 1.3219), 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.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 272.7 (lipidoses).