2027 ICD-10-CM Diagnosis Code L23.5Allergic contact dermatitis due to other chemical products
ICD-10-CM Codes›L00–L99›L20-L30›L23
- Billable — Valid for Submission
- Not Chronic
L23.5 is a billable ICD-10-CM diagnosis code for allergic contact dermatitis due to other chemical products. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Contact dermatitis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Allergic contact dermatitis caused by automotive grease
- Allergic contact dermatitis caused by chemical
- Allergic contact dermatitis caused by cutting oil
- Allergic contact dermatitis caused by drug in contact with skin
- Allergic contact dermatitis caused by iodine
- Allergic contact dermatitis caused by iodophore
- Allergic contact dermatitis caused by oil
- Allergic contact dermatitis caused by plant material
- Allergic contact dermatitis caused by povidone iodine
- Allergic contact dermatitis caused by rubber compound
- Allergic contact dermatitis caused by usnic acid
- Contact dermatitis caused by automotive grease
- Contact dermatitis caused by hydrocarbon
- Contact dermatitis caused by iodine
- Contact dermatitis caused by ketone
- Contact dermatitis caused by rubber
- Occupational allergic contact dermatitis caused by biocide
- Occupational allergic contact dermatitis caused by cutting oil
- Occupational allergic contact dermatitis caused by rubber compound
- Oil contact dermatitis
- Photoallergic dermatitis
- Photoallergic dermatitis due to biocide
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L23.5: its own notes plus those printed at L23, block L20-L30, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Allergic contact dermatitis due to cement
- Allergic contact dermatitis due to insecticide
- Allergic contact dermatitis due to plastic
- Allergic contact dermatitis due to rubber
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.-)
Notes
General instructions on how these codes are used.
- In this block the terms dermatitis and eczema are used synonymously and interchangeably.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name L23.5, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming L23.5: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 3
These codes carry an Excludes2 note naming L23.5: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 2
These codes say to code first a condition named in the note, and L23.5 is one of the conditions named.
- F54 Psychological and behavioral factors associated with disorders or diseases classified elsewhere
- Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
cement L23.5
chemical products NEC L23.5
insecticide L23.5
plastic L23.5
rubber L23.5
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Dermatitis, Allergic Contact
a contact dermatitis due to allergic sensitization to various substances. these substances subsequently produce inflammatory reactions in the skin of those who have acquired hypersensitivity to them as a result of prior exposure.
Patient EducationClinical
Allergy
An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert L23.5 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L23.5Overview
What is the ICD-10 code for allergic contact dermatitis due to other chemical products?
The ICD-10-CM code for allergic contact dermatitis due to other chemical products is L23.5 (sometimes written as L235). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L23.5 (Allergic contact dermatitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report allergic contact dermatitis due to other chemical products on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L23.5 group to?
When allergic contact dermatitis due to other chemical products 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.
Can L23.5 be reported with T78.40?
Not as a rule. The Excludes1 note at L23, which applies to L23.5, lists "allergy NOS (T78.40)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of L23.5?
Under the General Equivalence Mappings, allergic contact dermatitis due to other chemical products converts to ICD-9-CM 692.4 (chemical dermatitis NEC). The mapping is approximate, so confirm the match fits the documentation.
