S73.013A (Posterior subluxation of unspecified hip, initial encounter) compared with S73.013D (Posterior subluxation of unspecified hip, subsequent encounter), from the official CMS tabular data. S73.013A and S73.013D 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. S73.013A and S73.013D 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.
| S73.013APosterior subluxation of unspecified hip, initial encounter | S73.013DPosterior subluxation of unspecified hip, subsequent encounter | |
|---|---|---|
| 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 | Posterior subluxation of unspecified hip, initial encounter is a billable ICD-10-CM diagnosis code (S73.013A). | Posterior subluxation of unspecified hip, subsequent encounter is a billable ICD-10-CM diagnosis code (S73.013D). |
| 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