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S95.999A vs S95.999S

S95.999A (Other specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, initial encounter) compared with S95.999S (Other specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, sequela), from the official CMS tabular data. S95.999A and S95.999S code the same injury at a different phase of treatment.

Relationship

Review

Encounter relationship

S95.999A
Initial encounter
Other specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, initial encounter
S95.999S
Sequela
Other specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, 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. S95.999A and S95.999S 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.

Side by side

S95.999AOther specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, initial encounterS95.999SOther specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, sequela
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionOther specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, initial encounter is a billable ICD-10-CM diagnosis code (S95.999A).Other specified injury of unspecified blood vessel at ankle and foot level, unspecified leg, sequela is a billable ICD-10-CM diagnosis code (S95.999S).
7th characterThe appropriate 7th character is to be added to each code from category S95The appropriate 7th character is to be added to each code from category S95

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources