2027 ICD-10-CM Diagnosis Code L56.0Drug phototoxic response
ICD-10-CM Codes›L00–L99›L55-L59›L56
- Billable — Valid for Submission
- Not Chronic
L56.0 is a billable ICD-10-CM diagnosis code for drug phototoxic response. 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 acute phototoxic reaction. 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.
- Acute phototoxic reaction
- Photosensitivity caused by drug
- Phototoxic drug eruption
- Phototoxic reaction to tar or derivative
- Phototoxic reaction to topical chemical
- Phototoxic reaction to topical psoralen therapy
- Phototoxic reaction to topically applied medicament
- Phototoxicity
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L56.0: 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 L56.0, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming L56.0: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 7
These codes carry an Excludes2 note naming L56.0: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Reaction See Also: Disorder;
phototoxic L56.0
phototoxic L56.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Drug Reactions
Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.
The full article covers:
- What is a drug interaction?
- What are side effects?
- What are drug allergies?
- How can I stay safe when taking medicines?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L56.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L56.0Overview
What is the ICD-10 code for drug phototoxic response?
The ICD-10-CM code for drug phototoxic response is L56.0 (sometimes written as L560). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L56.0 (Other acute skin changes due to ultraviolet radiation) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report drug phototoxic response on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L56.0 group to?
When drug phototoxic response 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 L56.0 need an additional code?
When the condition applies, yes. The Use Additional Code note reads: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). The additional code is reported after L56.0.
What is the ICD-9 equivalent of L56.0?
Under the General Equivalence Mappings, drug phototoxic response converts to ICD-9-CM 692.72 (act drmtitis solar rdiat). The mapping is approximate, so confirm the match fits the documentation.
