E79.1

Lesch-Nyhan syndrome

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC50

Amyloidosis, Porphyria, and Other Specified Metabolic Disorders

CMS-HCC ESRD V24

HCC23

Other Significant Endocrine and Metabolic Disorders

RxHCC V08

RXHCC43

Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · E79.1

Synonyms

HGPRT deficiency

Inherited from E79Disorders of purine and pyrimidine metabolism

Excludes 1

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)

Inherited from E70-E88Metabolic disorders

Excludes 1

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)

Excludes 2

Ehlers-Danlos syndromes (Q79.6-)

Inherited from chapter 4Endocrine, nutritional and metabolic diseases

Excludes 1

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Note

All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Official Guidelines for E79.1

FY 2026 ›

I.C.4Chapter-specific guidanceChapter 4: Endocrine, Nutritional, and Metabolic Diseases (E00-E89)

Subsections

Find E79.1 in the alphabetic index

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