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] | — |
| R74.0 | Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH] | — |
| R74.01 | Elevation of levels of liver transaminase levels | ✓ |
| R74.01 | Elevation of levels of liver transaminase levels | ✓ |
| R74.02 | Elevation of levels of lactic acid dehydrogenase [LDH] | ✓ |
| R74.02 | Elevation of levels of lactic acid dehydrogenase [LDH] | ✓ |
| R74.8 | Abnormal levels of other serum enzymes | ✓ |
| R74.8 | Abnormal levels of other serum enzymes | ✓ |
| R74.9 | Abnormal serum enzyme level, unspecified | ✓ |
| R74.9 | Abnormal serum enzyme level, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code R74?
R74 is an ICD-10-CM category covering Abnormal serum enzyme levels. It contains 10 more specific diagnosis codes, 8 of which are billable.
Is R74 a billable code?
No — R74 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example R74.0 — Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]). 8 of the 10 codes under R74 are billable.
What codes fall under R74?
R74 includes R74.0, R74.0, R74.01, R74.01, R74.02, plus 5 more. See the full list with descriptions and billable status above.
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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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