R73.0 – Abnormal glucose

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

Non-billable header

ICD-10-CM code R73.0

Code: R73.0 (claims format: R730)
Description: Abnormal glucose
Billable: No – use a more specific code below
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: R73

Billable codes under R73.0

R73.0 is a header code and cannot be used on claims. Choose the most specific code:

R73.01 – Impaired fasting glucoseBillable
R73.02 – Impaired glucose tolerance (oral)Billable
R73.03 – PrediabetesBillable
R73.09 – Other abnormal glucoseBillable

Notes for R73.0

Excludes1 (not coded here):

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 inherited from parent codes

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

R73 – Elevated blood glucose level

Excludes1 (not coded here):

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

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)

Related codes in R73

R73.9 – Hyperglycemia, unspecifiedBillable

Frequently asked questions

What is ICD-10 code R73.0?

R73.0 is the ICD-10-CM code for abnormal glucose, in the block R70-R79 (Abnormal findings on examination of blood, without diagnosis).

Is R73.0 a billable code?

No. R73.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does R73.0 belong to?

It belongs to category R73 – Elevated blood glucose level.

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.