R77Header code — not billable

Other abnormalities of plasma proteins

Chapter
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Category
R77
Effective date
October 1, 2026

Related codes in category R77

R77.0Abnormality of albuminYesR77.1Abnormality of globulinYesR77.2Abnormality of alphafetoproteinYesR77.8Other specified abnormalities of plasma proteinsYesR77.9Abnormality of plasma protein, unspecifiedYes

Frequently asked questions

What is ICD-10 code R77?

R77 is an ICD-10-CM diagnosis code for Other abnormalities of plasma proteins.

Is R77 a billable code?

No. R77 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is R77 in?

R77 falls under Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

When did R77 become effective?

R77 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to R77?

R77 belongs to category R77, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.