R79Header code — not billable
Other abnormal findings of blood chemistry
- Chapter
- 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- Category
- R79
- Effective date
- October 1, 2026
Related codes in category R79
R79.0Abnormal level of blood mineralYesR79.1Abnormal coagulation profileYesR79.8Other specified abnormal findings of blood chemistryR79.81Abnormal blood-gas levelYesR79.82Elevated C-reactive protein (CRP)YesR79.83Abnormal findings of blood amino-acid levelYesR79.89Other specified abnormal findings of blood chemistryYesR79.9Abnormal finding of blood chemistry, unspecifiedYes
Frequently asked questions
What is ICD-10 code R79?
R79 is an ICD-10-CM diagnosis code for Other abnormal findings of blood chemistry.
Is R79 a billable code?
No. R79 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 R79 in?
R79 falls under Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
When did R79 become effective?
R79 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to R79?
R79 belongs to category R79, which includes 8 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.