R79.1: Abnormal coagulation profile
R79.1 is a billable, specific ICD-10-CM code for abnormal coagulation profile. It is valid for submission on a claim.
Check R79.1 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- coagulation defects (D68.-)
Excludes2: not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- 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
Excludes1 inherited from the categories above R79.1
A category’s note binds every code beneath it.
Written on R79: Other abnormal findings of blood chemistry
- asymptomatic hyperuricemia (E79.0)
- 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.-)
Excludes2 inherited from the categories above R79.1
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with R79.1
Their own Excludes1 notes name this code, so the conflict is not listed above.
- D68Other coagulation defects
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
R79.1 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56758Billing and Coding: Non-Invasive Vascular Studies
Alphabetic index entries that lead here
- Abnormal, abnormality, abnormalities›bleeding time
- Abnormal, abnormality, abnormalities›partial thromboplastin time(PTT)
- Abnormal, abnormality, abnormalities›prothrombin time(PT)
- Low›von Willebrand factor
- Prolonged, prolongation›bleeding(time) (idiopathic)
- Prolonged, prolongation›coagulation(time)
- Prolonged, prolongation›partial thromboplastin time(PTT)
- Prolonged, prolongation›prothrombin time
- Abnormal, abnormality, abnormalities›chemistry, blood›PTT
- Abnormal, abnormality, abnormalities›coagulation›profile
- Abnormal, abnormality, abnormalities›coagulation›time
Code history
Unchanged in every release from FY2024 to FY2027.