R79.1 – Abnormal coagulation profile
ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of blood, without diagnosis
ICD-10-CM code
R79.1
- Code
R79.1(claims format:R791)- Description
- Abnormal coagulation profile
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- Block
- R70-R79 Abnormal findings on examination of blood, without diagnosis
- Parent codes
- R79
Notes for R79.1
Applicable to:
- 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 (not coded here):
- coagulation defects (D68.-)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
R79 – Other abnormal findings of blood chemistry
Excludes1 (not coded here):
- 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 (not included here):
- hyperglycemia NOS (R73.9)
Use additional code:
- code to identify any retained foreign body, if applicable (Z18.-)
Block R70-R79
Excludes2 (not included here):
- abnormal findings on antenatal screening of mother (O28.-)
- abnormalities of lipids (E78.-)
- abnormalities of platelets and thrombocytes (D69.-)
- abnormalities of white blood cells classified elsewhere (D70-D72)
- coagulation hemorrhagic disorders (D65-D68)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
- hemorrhagic and hematological disorders of newborn (P50-P61)
Index terms for R79.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Low, von Willebrand factor
- Prolonged, prolongation, bleeding
- Prolonged, prolongation, coagulation
- Prolonged, prolongation, prothrombin time
- Abnormal, abnormality, abnormalities, bleeding time
- Prolonged, prolongation, partial thromboplastin time
- Abnormal, abnormality, abnormalities, prothrombin time
- Abnormal, abnormality, abnormalities, coagulation, time
- Abnormal, abnormality, abnormalities, coagulation, profile
- Abnormal, abnormality, abnormalities, chemistry, blood, PTT
- Abnormal, abnormality, abnormalities, partial thromboplastin time
Related codes in R79
Frequently asked questions
What is ICD-10 code R79.1?
R79.1 is the ICD-10-CM code for abnormal coagulation profile, in the block R70-R79 (Abnormal findings on examination of blood, without diagnosis).
Is R79.1 a billable code?
Yes. R79.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does R79.1 belong to?
It belongs to category R79 – Other abnormal findings of blood chemistry.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.