Question 1

Is R21 a billable ICD-10 code?

Accepted Answer

Yes, R21 is a valid billable ICD-10-CM code for rash and other nonspecific skin eruption. It can be used for medical billing and reimbursement purposes.

Question 2

What does ICD-10 code R21 mean?

Accepted Answer

ICD-10-CM code R21 represents Rash and other nonspecific skin eruption. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code R21 introduced?

Accepted Answer

Code R21 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code R21?

Accepted Answer

The parent category for R21 is section:R20-R23 (Symptoms and signs involving the skin and subcutaneous tissue (R20-R23)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from R21?

Accepted Answer

Code R21 has Type 1 Excludes (mutually exclusive conditions) including: specified type of rash- code to condition; vesicular eruption (R23.8). These conditions cannot be coded together with R21 as they represent different diagnoses.

R212026

Excludes12Not coded together

Excludes25Not included here

Notes9Additional information

Includes1Included conditions

Also Known As10Alternative terms

Is R21 a billable ICD-10 code?

What does ICD-10 code R21 mean?

When was ICD-10 code R21 introduced?

What is the parent category for ICD-10 code R21?

What conditions are excluded from R21?

What DRGs may include ICD-10 code R21?

How common is hospitalization for R21?