E79.1 – Lesch-Nyhan syndrome

ICD-10-CM 2027 diagnosis code · Metabolic disorders

Billable code

ICD-10-CM code E79.1

Code: E79.1 (claims format: E791)
Description: Lesch-Nyhan syndrome
Billable: Yes – valid for HIPAA-covered transactions
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: E79

Notes for E79.1

Applicable to:

HGPRT deficiency

Notes inherited from parent codes

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

E79 – Disorders of purine and pyrimidine metabolism

Excludes1 (not coded here):

Ataxia-telangiectasia (Q87.19)
Bloom's syndrome (Q82.8)
Cockayne's syndrome (Q87.19)
calculus of kidney (N20.0)
combined immunodeficiency disorders (D81.-)
Fanconi's anemia (D61.09)
gout (M1A.-, M10.-)
orotaciduric anemia (D53.0)
progeria (E34.8)
Werner's syndrome (E34.8)
xeroderma pigmentosum (Q82.1)

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-)

Index terms for E79.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in E79

Frequently asked questions

What is ICD-10 code E79.1?

E79.1 is the ICD-10-CM code for lesch-Nyhan syndrome, in the block E70-E88 (Metabolic disorders).

Is E79.1 a billable code?

Yes. E79.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E79.1 belong to?

It belongs to category E79 – Disorders of purine and pyrimidine 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.