F59 — Unspecified behavioral syndromes associated with physiological disturbances and physical factors
Is F59 billable?
Yes, but F59 is an unspecified code. F59 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F59 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 F59.
F59 at a glance
| Code | F59 |
|---|---|
| Description | Unspecified behavioral syndromes associated with physiological disturbances and physical factors |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F59 group to?
F59 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 887Other Mental Disorder Diagnosesmedical
How is F59 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F59. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Psychological and behavioral factors affecting medical condition
- Dysfunction › psychophysiologic
- Dysfunction › physiological NEC › psychogenic
Inclusion terms
Alternative wording in documentation that is classified to F59.
- Psychogenic physiological dysfunction NOS
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F59, but a patient may have both at the same time. When documentation supports it, F59 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F59 existed?
F59 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.