L21.1 Seborrheic infantile dermatitis

Billable ICD-10-CM code, FY2026.

Applies from L21 Seborrheic dermatitis

Excludes2 (not included here)

• infective dermatitis (L30.3)
• seborrheic keratosis (L82.-)

MS-DRG index

Defines the logic of DRG(s) 606-607 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 690.12 Seborrheic infantile dermatitis (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Pediatric diagnoses (age 0 through 17): Age conflict edit. These diagnoses are clinically expected only in patients age 0 through 17.

Code annotations containing back-references to L21.1

Back-references to L21

• Type 2 Excludes: L82 Seborrheic keratosis ("seborrheic dermatitis (L21.-)")

Diagnosis Index entries for L21.1

• Dermatitis (eczematous) › seborrheic › infantile
• Eczema (acute) (chronic) (erythematous) (fissum) (rubrum) (squamous) › infantile (due to any substance) › intertriginous
• Eczema (acute) (chronic) (erythematous) (fissum) (rubrum) (squamous) › infantile (due to any substance) › seborrheic
• Eczema (acute) (chronic) (erythematous) (fissum) (rubrum) (squamous) › intertriginous NEC › infantile
• Erythroderma (secondary) › desquamativum
• Leiner's disease
• Seborrhea, seborrheic › dermatitis › infantile
• Seborrhea, seborrheic › eczema › infantile

Nearby codes

• L21 Seborrheic dermatitis
• L21.0 Seborrhea capitis
• L21.1 Seborrheic infantile dermatitis (this code)
• L21.8 Other seborrheic dermatitis
• L21.9 Seborrheic dermatitis, unspecified