Difficulties Coding Dermatological Disorders Using the ICD-10: The DIADERM Study.

Area of Science:

• Dermatology
• Medical Informatics
• Health Classification Systems

Background:

• The International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10) has limitations in coding dermatological disorders.
• A specialized ICD-10 version adapted for dermatology was developed in Spain in 1999.
• The DIADERM study collected 10,999 dermatological diagnoses from Spanish outpatient clinics.

Purpose of the Study:

• Identify dermatological diagnoses from the DIADERM study uncodable by the adapted ICD-10.
• Determine reasons for coding failures.
• Assess the codability of these diagnoses using the draft ICD-11.

Main Methods:

• Selected diagnoses from the DIADERM study that could not be coded using the adapted ICD-10.
• Quantified and documented diagnoses uncodable by both the adapted ICD-10 and draft ICD-11.

Main Results:

• Out of 10,999 diagnoses, 41 were initially uncoded.
• 19 of these uncoded diagnoses were subsequently assigned an adapted ICD-10 code.
• The adapted ICD-10 and draft ICD-11 lacked specific codes for 22 and 17 diagnoses, respectively.

Conclusions:

• The adapted ICD-10 effectively codes most common dermatological diagnoses.
• Shortcomings exist, particularly for newly identified or emerging skin diseases.
• The ICD-11 shows improvement, and modifications are suggested for enhanced dermatological coding.