ICD-10-CM 2027
ICD-10 code for Proteinemia
From the official ICD-10-CM alphabetic index entry “Proteinemia”. Page updated September 29, 2026.
About coding Proteinemia
The ICD-10-CM code for Proteinemia is R77.9 (Abnormality of plasma protein, unspecified).
Within R77, choose R77.9 (Abnormality of plasma protein, unspecified) only when documentation doesn't support a more specific option: abnormality of albumin (R77.0), abnormality of globulin (R77.1), abnormality of alphafetoprotein (R77.2) and other specified abnormalities of plasma proteins (R77.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 947 (Signs and Symptoms with MCC, relative weight 1.261) and DRG 948 (Signs and Symptoms without MCC, relative weight 0.7835), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Proteinemia ICD-10 codes
What is the ICD-10 code for Proteinemia?
- R77.9 — Abnormality of plasma protein, unspecified.
Is R77.9 billable?
- Yes. R77.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R77.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R77.9 as a principal diagnosis.
Is R77.9 a CC or MCC?
- No. R77.9 is neither a CC nor an MCC under MS-DRG v44.0.