S82.042K — Displaced comminuted fracture of left patella, subsequent encounter for closed fracture with nonunion

BillableCC

Is S82.042K billable?

Yes — S82.042K is billable for FY2027. S82.042K is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S82.042K may be submitted for encounters from October 1, 2026 through September 30, 2027.

S82.042K at a glance

Code	S82.042K
Description	Displaced comminuted fracture of left patella, subsequent encounter for closed fracture with nonunion
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027
7th character "K"	subsequent encounter for closed fracture with nonunion

What does the 7th character "K" mean in S82.042K?

In S82.042K, the 7th character K means subsequent encounter for closed fracture with nonunion. The 7th character is required for S82.042K to be a valid, complete code.

Same condition, different episode of care — switch the 7th character:

Which MS-DRGs does S82.042K group to?

S82.042K sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical

As a secondary diagnosis, S82.042K is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is S82.042K listed in the Alphabetic Index?

The Alphabetic Index lists these routes under S82.04, the nearest indexed parent of S82.042K. Use them to find the family, then select the specific code.

Fracture, traumatic › patella › comminuted (abduction) (adduction) (separation)
Fracture, traumatic › patella › comminuted › nondisplaced (abduction) (adduction) (separation)

Excludes1 — never code together — inherited from S82

The conditions below can never be reported together with S82.042K on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

traumatic amputation of lower leg (S88.-)

Use additional code — inherited from Chapter 19

Report an additional code alongside S82.042K to fully describe the condition. S82.042K is sequenced first.

code to identify any retained foreign body, if applicable (Z18.-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of S82.042K, but a patient may have both at the same time. When documentation supports it, S82.042K and the excluded code may both be reported.

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from S80-S89

The conditions below are not part of S82.042K, but a patient may have both at the same time. When documentation supports it, S82.042K and the excluded code may both be reported.

burns and corrosions (T20-T32)
frostbite (T33-T34)
injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
insect bite or sting, venomous (T63.4)

Excludes2 — not included here — inherited from S82

The conditions below are not part of S82.042K, but a patient may have both at the same time. When documentation supports it, S82.042K and the excluded code may both be reported.

fracture of foot, except ankle (S92.-)
periprosthetic fracture around internal prosthetic ankle joint (M97.2)
periprosthetic fracture around internal prosthetic implant of knee joint (M97.1-)

How long has S82.042K existed?

S82.042K has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.