ICD-10-CM R79: Other abnormal findings of blood chemistry

ICD-10-CM Diagnosis Code (2025)

Official Description for R79

Other abnormal findings of blood chemistry

Coding Notes & Guidelines for R79

Excludes1: Not Coded Here
  • asymptomatic hyperuricemia (E79.0)
  • hyperglycemia NOS (R73.9)
  • hypoglycemia NOS (E16.2)
  • neonatal hypoglycemia (P70.3-P70.4)
  • specific findings indicating disorder of amino-acid metabolism (E70-E72)
  • specific findings indicating disorder of carbohydrate metabolism (E73-E74)
  • specific findings indicating disorder of lipid metabolism (E75.-)
Excludes1: Not Coded Here
  • abnormal level of lithium (R78.89)
  • disorders of mineral metabolism (E83.-)
  • neonatal hypomagnesemia (P71.2)
  • nutritional mineral deficiency (E58-E61)
Excludes1: Not Coded Here

coagulation defects (D68.-)

Excludes1: Not Coded Here

disorders of amino-acid metabolism (E70-E72)

Excludes2: Not Included Here

abnormality of fluid, electrolyte or acid-base balance (E86-E87)

Use Additional Code

code to identify any retained foreign body, if applicable (Z18.-)

Inclusion Terms
  • Abnormal blood level of cobalt
  • Abnormal blood level of copper
  • Abnormal blood level of iron
  • Abnormal blood level of magnesium
  • Abnormal blood level of mineral NEC
  • Abnormal blood level of zinc
Inclusion Terms
  • Abnormal or prolonged bleeding time
  • Abnormal or prolonged coagulation time
  • Abnormal or prolonged partial thromboplastin time [PTT]
  • Abnormal or prolonged prothrombin time [PT]
  • Low von Willebrand factor
Inclusion Terms

Homocysteinemia

Child Codes (More Specific Codes for R79):

R79.0 - Abnormal level of blood mineral R79.1 - Abnormal coagulation profile R79.8 - Other specified abnormal findings of blood chemistry R79.81 - Abnormal blood-gas level R79.82 - Elevated C-reactive protein (CRP) R79.83 - Abnormal findings of blood amino-acid level R79.89 - Other specified abnormal findings of blood chemistry R79.9 - Abnormal finding of blood chemistry, unspecified

About ICD-10-CM Code R79 (Other abnormal findings of blood chemistry)

ICD-10-CM code R79 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM R79 became effective on October 1, 2024.

This page provides detailed information about R79 - Other abnormal findings of blood chemistry. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other abnormal findings of blood chemistry.