R74: Abnormal serum enzyme levels

Codes under R74 (Abnormal serum enzyme levels). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
R74.0	Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]	—
R74.01	Elevation of levels of liver transaminase levels	✓
R74.02	Elevation of levels of lactic acid dehydrogenase [LDH]	✓
R74.8	Abnormal levels of other serum enzymes	✓
R74.9	Abnormal serum enzyme level, unspecified	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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