R74.9 – Abnormal serum enzyme level, unspecified

ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of blood, without diagnosis

Billable code

ICD-10-CM code R74.9

Code: R74.9 (claims format: R749)
Description: Abnormal serum enzyme level, unspecified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: R70-R79 Abnormal findings on examination of blood, without diagnosis
Parent codes: R74

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block R70-R79

Excludes2 (not included here):

abnormal findings on antenatal screening of mother (O28.-)
abnormalities of lipids (E78.-)
abnormalities of platelets and thrombocytes (D69.-)
abnormalities of white blood cells classified elsewhere (D70-D72)
coagulation hemorrhagic disorders (D65-D68)
diagnostic abnormal findings classified elsewhere - see Alphabetical Index
hemorrhagic and hematological disorders of newborn (P50-P61)

Index terms for R74.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Abnormal, abnormality, abnormalities, serum level, enzymes

Related codes in R74

Frequently asked questions

What is ICD-10 code R74.9?

R74.9 is the ICD-10-CM code for abnormal serum enzyme level, unspecified, in the block R70-R79 (Abnormal findings on examination of blood, without diagnosis).

Is R74.9 a billable code?

Yes. R74.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R74.9 belong to?

It belongs to category R74 – Abnormal serum enzyme levels.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.