Abnormal serum enzyme levels (R74) ICD-10-CM
The R74 code range covers abnormal serum enzyme levels with 6 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the R74 Range 6 codes · 4 billable
- R74 Abnormal serum enzyme levelsNon-billable
- R74.0 Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]Non-billable
- 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
About the R74 Code Range
Abnormal serum enzyme levels appear here as blood examination findings without a diagnosis.
R74 separates nonspecific elevations of transaminase and lactic acid dehydrogenase (LDH) from other abnormal enzyme levels. Within R74.0, R74.01 identifies elevated liver transaminase levels, while R74.02 identifies elevated LDH levels. R74.8 describes abnormal levels of other serum enzymes; R74.9 leaves the enzyme unspecified.
Questions About This Page
How many billable codes are in the R74 range?
Of the 6 codes in this range, 4 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the R74 range classify?
The range classifies abnormal serum enzyme levels. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
