ICD-10-CM 2027 diagnosis code

R79.8Other specified abnormal findings of blood chemistry

Not billable — use a more specific code

R79.8 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R79.8

R79.8 is the ICD-10-CM diagnosis code for other specified abnormal findings of blood chemistry. It belongs to category R79 (other abnormal findings of blood chemistry), block R70-R79 (abnormal findings on examination of blood, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within R79, choose R79.8 (Other specified abnormal findings of blood chemistry) only when documentation doesn't support a more specific option: abnormal level of blood mineral (R79.0), abnormal coagulation profile (R79.1) and abnormal finding of blood chemistry, unspecified (R79.9).

To report this condition, pick the subcode that matches the documentation: R79.81 (level), R79.82 ((CRP)), R79.83 (level) and R79.89 (chemistry).

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

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under R79.8

Notes that apply from higher levels

Instructions written at a parent level also apply to R79.8.

› From R79 Other abnormal findings of blood chemistry

Excludes1

asymptomatic hyperuricemia (E79.0)
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.-)

Excludes2

hyperglycemia NOS (R73.9)

Use additional code

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

Broader instructions also apply from R70-R79 Abnormal findings on examination of blood, without diagnosis and Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about R79.8

Is R79.8 billable?: No. R79.8 is a header code. Report one of its more specific subcodes instead.