Is R79.8 a billable ICD-10-CM code?

No. R79.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R79.8 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 R79.8?

R79.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above R79.8 (R79) and apply to it just the same.

R79.8

R79.8 — Other specified abnormal findings of blood chemistry

Non-billable headerICD-10-CM

R79.8 is a non-billable header ICD-10-CM code for other specified abnormal findings of blood chemistry. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above R79.8

These are not written on R79.8, but they bind it: a note on a category applies to every code beneath it. Billing R79.8 with anything listed here is a denial.

Written on R79 — Other abnormal findings of blood chemistry

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.-)

Risk adjustment

R79.8 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 history

R79.8 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead R79.8

4 child codes. Green means billable.

Related codes at this level

Codes that share R79. If R79.8 is not quite right, the correct code is usually one of these.

Questions about R79.8

Is R79.8 a billable ICD-10-CM code?: No. R79.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R79.8 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 R79.8?: R79.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above R79.8 (R79) and apply to it just the same.