Is R77.1 a billable ICD-10-CM code?

Yes. R77.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R77.1 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 R77.1?

R77.1 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 R77.1 (R77) and apply to it just the same.

R77.1

R77.1 — Abnormality of globulin

Billable / specific codeICD-10-CM

R77.1 is a billable, specific ICD-10-CM code for abnormality of globulin. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Hyperglobulinemia NOS

Excludes1 inherited from the categories above R77.1

These are not written on R77.1, but they bind it: a note on a category applies to every code beneath it. Billing R77.1 with anything listed here is a denial.

Written on R77 — Other abnormalities of plasma proteins

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

Other codes that can never be billed with R77.1

These codes carry an Excludes1 note pointing at R77.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R77.1 alone.

D89Other disorders involving the immune mechanism, not elsewhere classified

Risk adjustment

R77.1 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.

Medicare coverage

R77.1 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy

How R77.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R77.1.

Hyperglobulinemia
Abnormal, abnormality, abnormalities›globulin

Code history

R77.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share R77. If R77.1 is not quite right, the correct code is usually one of these.

Questions about R77.1

Is R77.1 a billable ICD-10-CM code?: Yes. R77.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R77.1 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 R77.1?: R77.1 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 R77.1 (R77) and apply to it just the same.