2027 ICD-10-CM Diagnosis Code L56.3Solar urticaria
ICD-10-CM Codes›L00–L99›L55-L59›L56
- Billable — Valid for Submission
- Not Chronic
L56.3 is a billable ICD-10-CM diagnosis code for solar urticaria. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. Coders also document this condition as drug-induced solar urticaria. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified and unspecified skin disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Drug-induced solar urticaria
- Solar urticaria
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L56.3: its own notes plus those printed at L56 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- lipomelanotic reticulosis (I89.8)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- viral warts (B07.-)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name L56.3, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming L56.3: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 6
These codes carry an Excludes2 note naming L56.3: its condition is not part of those codes, and both may be reported when the patient has both.
- Block L20-L30 Dermatitis and eczema
- L23 Allergic contact dermatitis
- L24 Irritant contact dermatitis
- L25 Unspecified contact dermatitis
- Block T20-T32
- X32 Exposure to sunlight
Index to Diseases and InjuriesGuidance
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Urticaria, Solar
chromophore-dependent photodermatosis triggered by uv and visible light.
Patient EducationClinical
Hives
Hives are red and sometimes itchy bumps on your skin. An allergic reaction to a drug or food usually causes them. Allergic reactions cause your body to release chemicals that can make your skin swell up in hives. People who have other allergies are more likely to get hives than other people. Other causes include infections and stress.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L56.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L56.3Overview
What is the ICD-10 code for solar urticaria?
The ICD-10-CM code for solar urticaria is L56.3 (sometimes written as L563). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L56.3 (Other acute skin changes due to ultraviolet radiation) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report solar urticaria on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L56.3 group to?
When solar urticaria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 depending on complications. Higher weights mean higher Medicare reimbursement.
Does L56.3 need an additional code?
When the condition applies, yes. The Use Additional Code note at L56, which applies to L56.3, reads: code to identify the source of the ultraviolet radiation (W89, X32). The additional code is reported after L56.3.
What is the ICD-9 equivalent of L56.3?
Under the General Equivalence Mappings, solar urticaria converts to ICD-9-CM 692.72 (act drmtitis solar rdiat). The mapping is approximate, so confirm the match fits the documentation.
