R77.1 — Abnormality of globulin
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
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
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).