R79

ICD-10Non-billable category

Other abnormal findings of blood chemistry

Official ICD-10-CM descriptor (FY2026)

Other abnormal findings of blood chemistry

R79 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

asymptomatic hyperuricemia (E79.0)
hyperglycemia NOS (R73.9)
hypoglycemia NOS (E16.2)
neonatal hypoglycemia (P70.3-P70.4)
specific findings indicating disorder of amino-acid metabolism (E70-E72)
specific findings indicating disorder of carbohydrate metabolism (E73-E74)
specific findings indicating disorder of lipid metabolism (E75.-)

Use additional code

Report an additional code to identify the associated condition.

code to identify any retained foreign body, if applicable (Z18.-)

More specific codes under R79

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Abnormal findings on examination of blood, without diagnosis (R70-R79)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.