S55.899A (Other specified injury of other blood vessels at forearm level, unspecified arm, initial encounter)
compared with
S55.899S (Other specified injury of other blood vessels at forearm level, unspecified arm, sequela),
from the official CMS tabular data. S55.899A and S55.899S code the same injury at a different phase of treatment.
Other specified injury of other blood vessels at forearm level, unspecified arm, sequela
Same underlying diagnosis, different encounter phase.
The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.
Source: ICD-10-CM Official Guidelines, Section I.C.19.a
Can these codes be reported together?
Same injury, other encounter phase. S55.899A and S55.899S code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.