Is R73 a billable ICD-10-CM code?

No. R73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R73 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on examination of blood, without diagnosis (R70-R79).

What cannot be coded together with R73?

R73 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R73

R73 — Elevated blood glucose level

Non-billable headerICD-10-CM

R73 is a non-billable header ICD-10-CM code for elevated blood glucose level. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Other codes that can never be billed with R73

These codes carry an Excludes1 note pointing at R73. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R73 alone.

R79Other abnormal findings of blood chemistry
E10Type 1 diabetes mellitus
E89.1Postprocedural hypoinsulinemia

Risk adjustment

R73 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead R73

2 child codes. Green means billable.

Questions about R73

Is R73 a billable ICD-10-CM code?: No. R73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R73 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on examination of blood, without diagnosis (R70-R79).
What cannot be coded together with R73?: R73 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.