ICD-10 Code for Melanosis

The default ICD-10-CM 2027 code for melanosis is L81.4 – Other melanin hyperpigmentation. More specific codes depend on the details documented, as listed in the official index (11 codes, 11 billable).

Main code: L81.4 – Other melanin hyperpigmentation
Billable: Yes

Index entries for Melanosis

addisonian – E27.1
- tuberculous – A18.7
adrenal – E27.1
colon – K63.89
conjunctiva – see Pigmentation, conjunctiva
- congenital – Q13.89
cornea (presenile) (senile) – see also Pigmentation, cornea
- congenital – Q13.4
eye NEC – H57.89
- congenital – Q15.8
lenticularis progressiva – Q82.1
liver – K76.89
precancerous – see also Melanoma, in situ
- malignant melanoma in – see Melanoma
Riehl's – L81.4
sclera – H15.89
- congenital – Q13.89
suprarenal – E27.1
tar – L81.4
toxic – L81.4

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.