Data Last Updated: June 9, 2025

NAACCR Item #3860: International Normalized Ratio Prothrombin Time

Item # Length Source of Standard Section Name Year Implemented Version Implemented XML NAACCR ID Parent XML Element
3860 3 NAACCR Stage/Prognostic Factors 2018 18 iNRProthrombinTime Tumor
Required Status:

NPCR Collect: No recommendation
CoC Collect: Required, site specific
SEER Collect: Collected by SEER from CoC-accredited hospitals
CCCR Collect: No recommendation

Description
International Normalized Ratio for Prothrombin Time (INR), an indicator of the liver’s ability to make clotting factors, is required to calculate the Model for End-Stage Liver Disease (MELD) score, which is used to assign priority for liver transplant.
Rationale
International Normalized Ratio for Prothrombin Time (INR) is a Registry Data Collection Variable in AJCC. This data item was previously collected for Liver, CS SSF# 8.
Allowable Values
0.0-9.9, X.1, X.7, X.8, X.9
Codes
Code Description
0.0 0.0
0.1 0.1 or less
0.2-9.9 0.2 - 9.9 (Exact ratio to nearest tenth)
X.1 10 or greater
X.7 Test ordered, results not in chart
X.8 Not applicable: Information not collected for this case (If this information is required by your standard setter, use of code X.8 may result in an edit error.)
X.9 Not documented in medical record INR (International Normalized Ratio for Prothrombin Time) not assessed or unknown if assessed
Code Notes
Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.