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ICD-10-CM 2027

ICD-10 code for glycoprotein metabolism disorder

E77.9

Disorder of glycoprotein metabolism, unspecified

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Disorder (of) › glycoprotein metabolism”. Page updated September 29, 2026.

About coding glycoprotein metabolism disorder

The ICD-10-CM code for glycoprotein metabolism disorder is E77.9 (Disorder of glycoprotein metabolism, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on E77.9.

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.

More specific glycoprotein metabolism disorder codes (official index)

  • specified NEC E77.8 — Other disorders of glycoprotein metabolism

Common questions about glycoprotein metabolism disorder ICD-10 codes

What is the ICD-10 code for glycoprotein metabolism disorder?

E77.9 — Disorder of glycoprotein metabolism, unspecified. More specific codes apply when the documentation supports them: E77.8.

Is E77.9 billable?

Yes. E77.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E77.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E77.9 as a principal diagnosis.

Is E77.9 a CC or MCC?

No. E77.9 is neither a CC nor an MCC under MS-DRG v44.0.