2027 ICD-10-CM Diagnosis Code L23.6Allergic contact dermatitis due to food in contact with the skin
ICD-10-CM Codes›L00–L99›L20-L30›L23
- Billable — Valid for Submission
- Not Chronic
L23.6 is a billable ICD-10-CM diagnosis code for allergic contact dermatitis due to food in contact with the skin. 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 allergic contact dermatitis caused by food in contact with skin. 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 food in contact with skin
- Contact dermatitis caused by food in contact with skin
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L23.6: 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.
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.
- dermatitis due to ingested food (L27.2)
- 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 L23.6, its category, or a range that includes it.
Excludes1 6
These codes carry an Excludes1 note naming L23.6: they are not reported together with it, unless the two conditions are unrelated.
- T61 Toxic effect of noxious substances eaten as seafooddermatitis (L23.6, L25.4, L27.2)
- T62 Toxic effect of other noxious substances eaten as fooddermatitis (L23.6, L25.4, L27.2)
- L25 Unspecified contact dermatitisallergic contact dermatitis (L23.-) names L23.-, which includes this code
- L50 Urticariaallergic contact dermatitis (L23.-) names L23.-, which includes this code
- L53 Other erythematous conditions
- T78.4 Other and unspecified allergy
Excludes2 5
These codes carry an Excludes2 note naming L23.6: its condition is not part of those codes, and both may be reported when the patient has both.
- L27.2 Dermatitis due to ingested fooddermatitis due to food in contact with skin (L23.6, L24.6, L25.4)
- T78.1 Other adverse food reactions, not elsewhere classifieddermatitis due to food in contact with skin (L23.6, L24.6, L25.4)
- L24 Irritant contact dermatitisallergic contact dermatitis (L23.-) names L23.-, which includes this code
- L27 Dermatitis due to substances taken internally
- L30 Other and unspecified dermatitis
Code First 2
These codes say to code first a condition named in the note, and L23.6 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
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 L23.6 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L23.6Overview
What is the ICD-10 code for allergic contact dermatitis due to food in contact with the skin?
The ICD-10-CM code for allergic contact dermatitis due to food in contact with the skin is L23.6 (sometimes written as L236). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is L23.6 (Allergic contact dermatitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report allergic contact dermatitis due to food in contact with the skin on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does L23.6 group to?
When allergic contact dermatitis due to food in contact with the skin 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 L23.6 be reported with T78.40?
Not as a rule. The Excludes1 note at L23, which applies to L23.6, 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 L23.6?
Under the General Equivalence Mappings, allergic contact dermatitis due to food in contact with the skin converts to ICD-9-CM 692.5 (topical food dermatitis). The mapping is approximate, so confirm the match fits the documentation.
