L23 — Allergic contact dermatitis
Is L23 billable?
No — L23 is a non-billable header code. L23 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 11 billable codes beneath L23.
Billable codes under this header
- L23.0Allergic contact dermatitis due to metals
- L23.1Allergic contact dermatitis due to adhesives
- L23.2Allergic contact dermatitis due to cosmetics
- L23.3Allergic contact dermatitis due to drugs in contact with skin
- L23.4Allergic contact dermatitis due to dyes
- L23.5Allergic contact dermatitis due to other chemical products
- L23.6Allergic contact dermatitis due to food in contact with the skin
- L23.7Allergic contact dermatitis due to plants, except food
- L23.9Allergic contact dermatitis, unspecified cause
- L23.81Allergic contact dermatitis due to animal (cat) (dog) dander
- L23.89Allergic contact dermatitis due to other agents
L23 at a glance
| Code | L23 |
|---|---|
| Description | Allergic contact dermatitis |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with L23 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here
The conditions below are not part of L23, but a patient may have both at the same time. When documentation supports it, L23 and the excluded code may both be reported.
Excludes2 — not included here — inherited from Chapter 12
The conditions below are not part of L23, but a patient may have both at the same time. When documentation supports it, L23 and the excluded code may both 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.-)
Excludes2 — not included here — inherited from L20-L30
The conditions below are not part of L23, but a patient may have both at the same time. When documentation supports it, L23 and the excluded code may both be reported.
What codes fall under L23? (10)
- L23.0Allergic contact dermatitis due to metals
- L23.1Allergic contact dermatitis due to adhesives
- L23.2Allergic contact dermatitis due to cosmetics
- L23.3Allergic contact dermatitis due to drugs in contact with skin
- L23.4Allergic contact dermatitis due to dyes
- L23.5Allergic contact dermatitis due to other chemical products
- L23.6Allergic contact dermatitis due to food in contact with the skin
- L23.7Allergic contact dermatitis due to plants, except food
- L23.8Allergic contact dermatitis due to other agentsnot billable
- L23.9Allergic contact dermatitis, unspecified cause
How long has L23 existed?
L23 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with L23?
ICD-10-CM declares these codes mutually exclusive with L23 — exactly one of each pair can be correct for a given encounter.