D03.9 — Melanoma in situ, unspecified

BillableUnspecified

Is D03.9 billable?

Yes, but D03.9 is an unspecified code. D03.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, D03.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting D03.9 — the more specific alternatives are listed below.

More specific alternatives

D03.9 at a glance

Code	D03.9
Description	Melanoma in situ, unspecified
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does D03.9 group to?

D03.9 sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

595Major Skin Disorders with MCCmedical
596Major Skin Disorders without MCCmedical

How is D03.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to D03.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Melanoma › in situ (malignant)
Melanoma › in situ › nail (malignant)

How long has D03.9 existed?

D03.9 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 conditions are coded to D03.9?

ICD-10 code for Melanoma