F99 diagnosis code · Billable category · FY2027
F99 Mental disorder, not otherwise specified
- Billable
- Not CC/MCC
- POA reported
F99 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.
Where it sits
- Chapter 5 Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- F99 Unspecified mental disorder (F99)
- F99 Mental disorder, not otherwise specified
- CC / MCC
- Neither
- MS-DRG
- 880
- HCC V28
- –
- POA
- Reported
- Code Editor
- –
- Index entries
- 10
Instructions
At F99
Inclusion terms
- Mental illness NOS
Excludes1
- unspecified mental disorder due to known physiological condition (F09) F09
Notes that also apply
Chapter 5 instructions (Includes 1, Excludes2 1): printed on the chapter 5 page.
Index entries
- Psychiatric disorder or problem → F99
- Situation, psychiatric → F99
- Aberration›mental → F99
- Disease, diseased›mental → F99
- Disease, diseased›psychiatric → F99
- Disorder (of)›mental (or behavioral) (nonpsychotic) → F99
- Disorder (of)›psychological → F99
- Disturbance(s)›mental → F99
- Problem (with) (related to)›psychiatric → F99
- Reaction›psychogenic → F99
NCHS Alphabetic Index. Index first, then the Tabular List.
Medicare grouping and edits
| CC / MCC | Neither |
|---|---|
| Appendix B | MDC 19 Mental Diseases and Disorders, MS-DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction…) |
| Code Editor | – |
| POA | Reported |
| HCC V28 | – |
CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.