R79.1

ICD-10Billable

Abnormal coagulation profile

Official ICD-10-CM descriptor (FY2026)

Abnormal coagulation profile

R79.1 is valid for submission on a claim — CMS flags it as a billable, specific code.

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

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

coagulation defects (D68.-)

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

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

Related codes in R79

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Abnormal findings on examination of blood, without diagnosis (R70-R79)
Parent code: R79

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.