E72.4

Disorders of ornithine metabolism

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

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 · E72.4

Excludes 1

hereditary choroidal dystrophy (H31.2-)

Synonyms

Hyperammonemia-Hyperornithinemia-Homocitrullinemia syndrome Ornithinemia (types I, II) Ornithine transcarbamylase deficiency

Inherited from E72Other disorders of amino-acid metabolism

Excludes 1

disorders of: aromatic amino-acid metabolism (E70.-) branched-chain amino-acid metabolism (E71.0-E71.2) fatty-acid metabolism (E71.3) purine and pyrimidine metabolism (E79.-) gout (M1A.-, M10.-)

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 E72.4

FY 2026 ›

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

Subsections

Find E72.4 in the alphabetic index

11 index paths lead to this code