ICD10BillableValid for clinical use
ICD-10 Code E77.1: Defects in glycoprotein degradation
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).
When is it used?
- May be used when a clinician documents defects in glycoprotein degradation in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E70-E88Metabolic disorders
category
E77Disorders of glycoprotein metabolism
currentE77
Official coding notes
Inclusion terms
- Aspartylglucosaminuria
- Fucosidosis
- Mannosidosis
- Sialidosis [mucolipidosis I]
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
EndocrinologistGeneral Physician
Related codes
Sibling codes
Coverage-related procedures and services
CPT 11720high
DEBRIDEMENT OF NAIL(S) BY ANY METHOD(S); 1 TO 5
Source: CMS coverage guidance
CPT 11721high
DEBRIDEMENT OF NAIL(S) BY ANY METHOD(S); 6 OR MORE
Source: CMS coverage guidance
HCPCS G0127high
TRIMMING OF DYSTROPHIC NAILS, ANY NUMBER
Source: CMS coverage guidance
CPT 11719high
TRIMMING OF NONDYSTROPHIC NAILS, ANY NUMBER
Source: CMS coverage guidance
CPT 11056high
PARING OR CUTTING OF BENIGN HYPERKERATOTIC LESION (EG, CORN OR CALLUS); 2 TO 4 LESIONS
Source: CMS coverage guidance
CPT 11057high
PARING OR CUTTING OF BENIGN HYPERKERATOTIC LESION (EG, CORN OR CALLUS); MORE THAN 4 LESIONS
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 399249008high
Adult fucosidosis
Source: SNOMED International ICD-10 map
SNOMED_CT 879937000high
Alpha-N-acetylgalactosaminidase deficiency type 1
Source: SNOMED International ICD-10 map
SNOMED_CT 880065001high
Alpha-N-acetylgalactosaminidase deficiency type 2
Source: SNOMED International ICD-10 map
SNOMED_CT 880066000high
Alpha-N-acetylgalactosaminidase deficiency type 3
Source: SNOMED International ICD-10 map
SNOMED_CT 54954004high
Aspartylglucosaminuria
Source: SNOMED International ICD-10 map
SNOMED_CT 238047006high
Beta-D-mannosidosis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
E77.1
Common synonyms
Defects in glycoprotein degradation
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.