Q84.4 — Congenital leukonychia

Billable

Is Q84.4 billable?

Yes — Q84.4 is billable for FY2027. Q84.4 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Q84.4 may be submitted for encounters from October 1, 2026 through September 30, 2027.

Q84.4 at a glance

Code	Q84.4
Description	Congenital leukonychia
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does Q84.4 group to?

Q84.4 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.

606Minor Skin Disorders with MCCmedical
607Minor Skin Disorders without MCCmedical

How is Q84.4 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to Q84.4. They show the wording a clinician may have documented, which often differs from the Tabular description.

Leukonychia › congenital (punctata) (striata)
Leukopathia unguium › congenital

Excludes2 — not included here — inherited from Chapter 17

The conditions below are not part of Q84.4, but a patient may have both at the same time. When documentation supports it, Q84.4 and the excluded code may both be reported.

inborn errors of metabolism (E70-E88)

How long has Q84.4 existed?

Q84.4 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.