E76.21 – Morquio mucopolysaccharidoses

ICD-10-CM 2027 diagnosis code · Metabolic disorders

Non-billable header

ICD-10-CM code E76.21

Code: E76.21 (claims format: E7621)
Description: Morquio mucopolysaccharidoses
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E70-E88 Metabolic disorders
Parent codes: E76 › E76.2

Billable codes under E76.21

E76.21 is a header code and cannot be used on claims. Choose the most specific code:

E76.210 – Morquio A mucopolysaccharidosesBillable
E76.211 – Morquio B mucopolysaccharidosesBillable
E76.219 – Morquio mucopolysaccharidoses, unspecifiedBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block E70-E88

Excludes1 (not coded here):

androgen insensitivity syndrome (E34.5-)
congenital adrenal hyperplasia (E25.0)
hemolytic anemias attributable to enzyme disorders (D55.-)
Marfan syndrome (Q87.4-)
5-alpha-reductase deficiency (E29.1)

Excludes2 (not included here):

Ehlers-Danlos syndromes (Q79.6-)

Related codes in E76.2

E76.22 – Sanfilippo mucopolysaccharidosesBillable
E76.29 – Other mucopolysaccharidosesBillable

Frequently asked questions

What is ICD-10 code E76.21?

E76.21 is the ICD-10-CM code for morquio mucopolysaccharidoses, in the block E70-E88 (Metabolic disorders).

Is E76.21 a billable code?

No. E76.21 is a header code with more specific child codes; report one of the billable codes listed above.

What category does E76.21 belong to?

It belongs to category E76 – Disorders of glycosaminoglycan metabolism.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.