Is R77 a billable ICD-10-CM code?

No. R77 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R77 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 R77?

R77 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R77

R77 — Other abnormalities of plasma proteins

Non-billable headerICD-10-CM

R77 is a non-billable header ICD-10-CM code for other abnormalities of plasma proteins. 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.

disorders of plasma-protein metabolism (E88.0-)

Other codes that can never be billed with R77

These codes carry an Excludes1 note pointing at R77. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R77 alone.

D89Other disorders involving the immune mechanism, not elsewhere classified

Risk adjustment

R77 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 R77

5 child codes. Green means billable.

Questions about R77

Is R77 a billable ICD-10-CM code?: No. R77 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R77 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 R77?: R77 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.