Is ICD-10-CM code R74 billable?

No, R74 (Abnormal serum enzyme levels) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code R74 belong to?

R74 belongs to Chapter 18 of the ICD-10-CM tabular list: R00–R99 (Symptoms, Signs and Abnormal Clinical and Laboratory Findings).

R74Not billable, use a more specific code below

Abnormal serum enzyme levels

In Abnormal findings on examination of blood, without diagnosis (R70-R79), chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings

4 billable codes under R74: none are a CC or MCC; none map to an HCC.

Instructional notes

Also applies, from Abnormal findings on examination of blood, without diagnosis (R70-R79)

These notes sit on R70-R79 and apply to every code under it, including R74.

Excludes2: not included here, code separately if applicable

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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers when to report symptom, sign, and abnormal finding codes (R00-R99), plus specific rules for falls, coma scales, non-infectious SIRS, death NOS, and NIHSS scores.

Use of symptom codes (page 75)
Use of a symptom code with a definitive diagnosis code (page 75)
Combination codes that include symptoms (page 75)
Repeated falls (page 76)
Coma (page 76)
Functional quadriplegia (page 76)
SIRS due to Non-Infectious Process (page 77)
Death NOS (page 77)

Read Section I.C.18 (page 75), 1 more topics

All codes under R74

R74 can't be used on a claim. Pick a billable code below; grey headings group them.

R74 MS-DRGs

As the principal diagnosis, all 4 billable codes under R74 group to MS-DRG 947 or 948 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.