Excludes1 pair

F68- vs Z76.5

F68 and Z76.5 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.

The official note, declared on Z76.5
factitious disorder (F68.1-, F68.A)
F68

Other disorders of adult personality and behavior

Not billable
Chapter 5
Mental, Behavioral and Neurodevelopmental disorders
Section
F60-F69
Z76.5

Malingerer [conscious simulation]

Billable
Chapter 21
Factors influencing health status and contact with health services
Section
Z69-Z76
Use when the record says
  • Person feigning illness (with obvious motivation)
Indexed under
  • Conscious simulation (of illness)
  • Feigned illness
  • Malingerer, malingering
  • Simulation, conscious (of illness)
  • Behavior › drug seeking

These two codes sit in different chapters of the Tabular List, which is usually the clearest signal that they describe different underlying processes rather than different degrees of the same one.

Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027