ICD-10-CM 2027 diagnosis code

R73.0Abnormal glucose

Not billable — use a more specific code

R73.0 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 R73.0

R73.0 is the ICD-10-CM diagnosis code for abnormal glucose. It belongs to category R73 (elevated blood glucose level), 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 R73 (elevated blood glucose level), R73.0 is specifically for abnormal glucose. Related codes cover hyperglycemia, unspecified (R73.9).

To report this condition, pick the subcode that matches the documentation: R73.01 (glucose), R73.02 ((oral)), R73.03 (Prediabetes) and R73.09 (glucose).

Don't report R73.0 together with the conditions in its Excludes1 note: abnormal glucose in pregnancy (O99.81-), diabetes mellitus (E08-E13), dysmetabolic syndrome X (E88.81-), gestational diabetes (O24.4-) and 3 more.

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 R73.0

Coding notes

Excludes1Not coded here — never report together with this code

abnormal glucose in pregnancy (O99.81-)
diabetes mellitus (E08-E13)
dysmetabolic syndrome X (E88.81-)
gestational diabetes (O24.4-)
glycosuria (R81)
hypoglycemia (E16.2)
type 1 diabetes mellitus, presymptomatic (E10.A-)

Notes that apply from higher levels

Instructions written at a parent level also apply to R73.0.

› From R73 Elevated blood glucose level

Excludes1

diabetes mellitus (E08-E13)
diabetes mellitus in pregnancy, childbirth and the puerperium (O24.-)
neonatal disorders (P70.0-P70.2)
postsurgical hypoinsulinemia (E89.1)

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.

Codes whose notes reference R73.0

R94.7Excludes2

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 R73.0

Is R73.0 billable?: No. R73.0 is a header code. Report one of its more specific subcodes instead.