L27: Dermatitis due to substances taken internally

L27 refers to Dermatitis due to substances taken internally, which includes inflammatory skin reactions triggered by allergens, irritants, immune dysfunction, or chronic scratching. These dermatologic disorders can present acutely or become chronic, requiring ongoing care and skin management.

Symptoms

• Red, itchy patches – Common across most forms of dermatitis
• Dry, flaky skin – Notable in atopic (L20) and seborrheic dermatitis (L21)
• Oozing or crusting lesions – Seen in allergic and irritant contact dermatitis (L23–L24)
• Thickened skin from scratching – Found in L28 (lichen simplex)
• Widespread skin shedding – Occurs in exfoliative dermatitis (L26)

Diagnosis

Diagnosis of Dermatitis due to substances taken internally involves clinical skin examination, patient history, patch testing (for contact types), and sometimes skin biopsy. Identification of triggers and detailed symptom history are crucial for accurate diagnosis and management.

ICD10 Code Usage

ICD10 code L27 is used by dermatologists, allergists, pediatricians, and general practitioners for treatment plans, prescription of topical/systemic therapies, documenting flare-ups, and insurance reimbursement.

Related Codes

• L20 – Atopic dermatitis
• L21 – Seborrheic dermatitis
• L22 – Diaper dermatitis
• L23 – Allergic contact dermatitis
• L24 – Irritant contact dermatitis
• L25 – Unspecified contact dermatitis
• L26 – Exfoliative dermatitis
• L28 – Lichen simplex chronicus and prurigo
• L29 – Pruritus
• L30 – Other and unspecified dermatitis

FAQs

Q1: What is ICD10 code L27?
A: It refers to Dermatitis due to substances taken internally, a skin condition characterized by inflammation, itching, and various forms of irritation or immune response.

Q2: What’s the difference between allergic (L23) and irritant (L24) contact dermatitis?
A: L23 involves an immune reaction to allergens, while L24 results from direct skin damage by irritants like soaps or chemicals.

Q3: Can these conditions be chronic?
A: Yes—many such as atopic dermatitis (L20), lichen simplex (L28), and pruritus (L29) may persist or recur over time.

Q4: Are internal substances covered under these codes?
A: Yes—L27 specifically covers dermatitis triggered by medications, foods, or other internal agents.

Q5: Who manages these conditions?
A: Dermatologists, allergists, pediatricians, and primary care physicians commonly manage dermatitis based on the underlying cause.

Conclusion

ICD10 code L27 ensures accurate classification of Dermatitis due to substances taken internally, allowing for targeted treatment strategies, allergy identification, and efficient documentation of dermatologic care.