FY2027 ICD-10-CM reference
S73.016A: Posterior dislocation of unspecified hip, initial encounter
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Posterior dislocation of unspecified hip, initial encounter. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
Source: S00-T88 (chapter, inherited).
Instructional note
code to identify any retained foreign body, if applicable (Z18.-)
Source: S00-T88 (chapter, inherited).
Excludes2
birth trauma (P10-P15)
Source: S00-T88 (chapter, inherited).
Excludes2
obstetric trauma (O70-O71)
Source: S00-T88 (chapter, inherited).
Instructional note
The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Source: S00-T88 (chapter, inherited).
Excludes2
burns and corrosions (T20-T32)
Source: S70-S79 (section, inherited).
Excludes2
frostbite (T33-T34)
Source: S70-S79 (section, inherited).
Excludes2
snake bite (T63.0-)
Source: S70-S79 (section, inherited).
Excludes2
venomous insect bite or sting (T63.4-)
Source: S70-S79 (section, inherited).
Includes
avulsion of joint or ligament of hip
Source: S73 (category, inherited).
Includes
laceration of cartilage, joint or ligament of hip
Source: S73 (category, inherited).
Includes
sprain of cartilage, joint or ligament of hip
Source: S73 (category, inherited).
Includes
traumatic hemarthrosis of joint or ligament of hip
Source: S73 (category, inherited).
Includes
traumatic rupture of joint or ligament of hip
Source: S73 (category, inherited).
Includes
traumatic subluxation of joint or ligament of hip
Source: S73 (category, inherited).
Includes
traumatic tear of joint or ligament of hip
Source: S73 (category, inherited).
Code also
any associated open wound
Source: S73 (category, inherited).
Excludes2
strain of muscle, fascia and tendon of hip and thigh (S76.-)
Source: S73 (category, inherited).
Seventh-character instruction
The appropriate 7th character is to be added to each code from category S73
Source: S73 (category, inherited).
Instructional note
initial encounter
Source: S73 (category, inherited).
Instructional note
subsequent encounter
Source: S73 (category, inherited).
Instructional note
sequela
Source: S73 (category, inherited).
Excludes2
dislocation and subluxation of hip prosthesis (T84.020, T84.021)
Source: S73.0 (self, inherited).
Seventh-character definitions
- A: initial encounter
- D: subsequent encounter
- S: sequela
Compare the FY2027 additions, removals and billable-status changes
What does S73.016A mean in FY2027?
The official ICD-10-CM descriptor is Posterior dislocation of unspecified hip, initial encounter. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is S73.016A billable in FY2027?
The FY2027 order file marks S73.016A as billable. Check the complete Tabular instructions and documentation before assigning it.
Does S73.016A map to an HCC?
In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), S73.016A maps to CMS-HCC V28 HCC 402 (Hip Fracture/Dislocation). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. ESRD, RxHCC, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition