R79.1

Billable

ChapterR00–R99

Ranksubcategory

Official Description

Abnormal coagulation profile

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

Instructional Notes

Includes

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.-)

Excludes2(Not included here)

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

General instructions are available for the parent sections:

View CH18 Notes View R70-R79 Notes View R79 Notes

Clinical Hierarchy

CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

R70-R79Abnormal findings on examination of blood, without diagnosis (R70-R79)

R79Other abnormal findings of blood chemistry

R79.1Abnormal coagulation profile

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R79.1:

categoryR79

Other abnormal findings of blood chemistry

View context instructions

blockR70-R79

Abnormal findings on examination of blood, without diagnosis (R70-R79)

View context instructions

chapterCH18

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to R79.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

11 raw paths

Abnormal, abnormality, abnormalities6 unique routes

bleeding time→R79.1

chemistry, blood

PTT→R79.1

coagulation(2 variants)

profile→R79.1

time→R79.1

partial thromboplastin time (PTT)→R79.1

prothrombin time (PT)→R79.1

Low1 unique routes

von Willebrand factor→R79.1