S37.421A vs S37.421S
S37.421A (Contusion of ovary, unilateral, initial encounter) compared with S37.421S (Contusion of ovary, unilateral, sequela), from the official CMS tabular data. S37.421A and S37.421S code the same injury at a different phase of treatment.
Can these codes be reported together?
Same injury, other encounter phase. S37.421A and S37.421S 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
| S37.421AContusion of ovary, unilateral, initial encounter | S37.421SContusion of ovary, unilateral, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-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) |
| Definition | Contusion of ovary, unilateral, initial encounter is a billable ICD-10-CM diagnosis code (S37.421A). | Contusion of ovary, unilateral, sequela is a billable ICD-10-CM diagnosis code (S37.421S). |
| 7th character | The appropriate 7th character is to be added to each code from category S37 | The appropriate 7th character is to be added to each code from category S37 |
| Includes | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia | injuries to the abdominal wall injuries to the anus injuries to the buttock injuries to the external genitalia |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources