ICD-10-CM 2027
ICD-10 code for intrinsic allergic eczema
From the official ICD-10-CM alphabetic index entry “Eczema (acute) (chronic) (erythematous) (fissum) (rubrum) (squamous) › intrinsic (allergic)”. Page updated September 29, 2026.
About coding intrinsic allergic eczema
The ICD-10-CM code for intrinsic allergic eczema is L20.84 (Intrinsic (allergic) eczema).
Within L20.8 (other atopic dermatitis), L20.84 is specifically for intrinsic (allergic) eczema. Related codes cover atopic neurodermatitis (L20.81), Flexural eczema (L20.82), infantile (acute) (chronic) eczema (L20.83) and other atopic dermatitis (L20.89).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 606 (Minor Skin Disorders with MCC, relative weight 1.5728) and DRG 607 (Minor Skin Disorders without MCC, relative weight 0.8772), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about intrinsic allergic eczema ICD-10 codes
What is the ICD-10 code for intrinsic allergic eczema?
- L20.84 — Intrinsic (allergic) eczema.
Is L20.84 billable?
- Yes. L20.84 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can L20.84 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict L20.84 as a principal diagnosis.
Is L20.84 a CC or MCC?
- No. L20.84 is neither a CC nor an MCC under MS-DRG v44.0.