L56.0 Drug phototoxic response

Billable ICD-10-CM code, FY2026.

Use additional code

• code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Applies from L56 Other acute skin changes due to ultraviolet radiation

Use additional code

• code to identify the source of the ultraviolet radiation (W89, X32)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 692.72 Acute dermatitis due to solar radiation (approximate)

Code annotations containing back-references to L56.0

Back-references to L56.0

• Type 2 Excludes: L27 Dermatitis due to substances taken internally ("drug phototoxic response (L56.0)")

Back-references to L56

• Type 1 Excludes: K13.0 Diseases of lips ("cheilitis due to radiation-related disorders (L55-L59)")
• Type 2 Excludes: L23 Allergic contact dermatitis ("radiation-related disorders of the skin and subcutaneous tissue (L55-L59)")
• Type 2 Excludes: L24 Irritant contact dermatitis ("radiation-related disorders of the skin and subcutaneous tissue (L55-L59)")
• Type 2 Excludes: L25 Unspecified contact dermatitis ("radiation-related disorders of the skin and subcutaneous tissue (L55-L59)")
• Type 1 Excludes: T66 Radiation sickness, unspecified ("radiation related disorders of the skin and subcutaneous tissue (L55-L59)")
• Type 1 Excludes: T67 Effects of heat and light ("radiation-related disorders of the skin and subcutaneous tissue (L55-L59)")
• Type 2 Excludes: X32 Exposure to sunlight ("radiation-related disorders of the skin and subcutaneous tissue (L55-L59)")

Diagnosis Index entries for L56.0

• Reaction › drug NEC › phototoxic
• Response (drug) › phototoxic

Nearby codes

• L56 Other acute skin changes due to ultraviolet radiation
• L56.0 Drug phototoxic response (this code)
• L56.1 Drug photoallergic response
• L56.2 Photocontact dermatitis [berloque dermatitis]
• L56.3 Solar urticaria
• L56.4 Polymorphous light eruption
• L56.5 Disseminated superficial actinic porokeratosis (DSAP)