Is E72.4 a billable ICD-10-CM code?

Yes. E72.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E72.4 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).

What cannot be coded together with E72.4?

E72.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E72.4

E72.4 — Disorders of ornithine metabolism

Billable / specific codeICD-10-CM

E72.4 is a billable, specific ICD-10-CM code for disorders of ornithine metabolism. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

hereditary choroidal dystrophy (H31.2-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Other codes that can never be billed with E72.4

These codes carry an Excludes1 note pointing at E72.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E72.4 alone.

E72.20Disorder of urea cycle metabolism, unspecified
E72.2Disorders of urea cycle metabolism

Risk adjustment

E72.4 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How E72.4 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E72.4.

Hyperornithinemia
Ornithine metabolism disorder
Ornithinemia(Type I) (Type II)
Deficiency, deficient›ornithine transcarbamylase
Disorder›ornithine metabolism
Hyperaminoaciduria›ornithine
Syndrome›hyperammonemia-hyperornithinemia-homocitrullinemia
Disorder›metabolism NOS›ornithine
Disorder›urea cycle metabolism›ornithine transcarbamylase deficiency
Disturbance›metabolism›ornithine
Disorder›metabolism NOS›amino-acid›ornithine

Related codes at this level

Codes that share E72. If E72.4 is not quite right, the correct code is usually one of these.

Questions about E72.4

Is E72.4 a billable ICD-10-CM code?: Yes. E72.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E72.4 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).
What cannot be coded together with E72.4?: E72.4 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.