S73.042A (Central subluxation of left hip, initial encounter) compared with S73.042S (Central subluxation of left hip, sequela), from the official CMS tabular data. S73.042A and S73.042S code the same injury at a different phase of treatment.
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
Same injury, other encounter phase. S73.042A and S73.042S 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.
| S73.042ACentral subluxation of left hip, initial encounter | S73.042SCentral subluxation of left hip, 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 | Central subluxation of left hip, initial encounter is a billable ICD-10-CM diagnosis code (S73.042A). | Central subluxation of left hip, sequela is a billable ICD-10-CM diagnosis code (S73.042S). |
| 7th character | The appropriate 7th character is to be added to each code from category S73 | The appropriate 7th character is to be added to each code from category S73 |
| Includes | avulsion of joint or ligament of hip laceration of cartilage, joint or ligament of hip sprain of cartilage, joint or ligament of hip traumatic hemarthrosis of joint or ligament of hip | avulsion of joint or ligament of hip laceration of cartilage, joint or ligament of hip sprain of cartilage, joint or ligament of hip traumatic hemarthrosis of joint or ligament of hip |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources