R90.82 — White matter disease, unspecified
Is R90.82 billable?
Yes, but R90.82 is an unspecified code. R90.82 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, R90.82 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 R90.82 — the more specific alternatives are listed below.
R90.82 at a glance
| Code | R90.82 |
|---|---|
| Description | White matter disease, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does R90.82 group to?
R90.82 sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 091Other Disorders of Nervous System with MCCmedical
- 092Other Disorders of Nervous System with CCmedical
- 093Other Disorders of Nervous System without CC/MCCmedical
How is R90.82 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to R90.82. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disease, diseased › white matter
Excludes1 — never code together — inherited from R90-R94
The conditions below can never be reported together with R90.82 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R90.82, but a patient may have both at the same time. When documentation supports it, R90.82 and the excluded code may both be reported.
How long has R90.82 existed?
R90.82 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.