ICD-10-CM 2027 diagnosis code
S02.121KFracture of orbital roof, right side, subsequent encounter for fracture with nonunion
S02.121K is a valid, billable ICD-10-CM code for fracture of orbital roof, right side, subsequent encounter for fracture with nonunion. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Fracture of orbital roof, right side, 7thK
Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About S02.121K
S02.121K is the ICD-10-CM diagnosis code for fracture of orbital roof, right side, subsequent encounter for fracture with nonunion. It belongs to category S02 (fracture of skull and facial bones), block S00-S09 (injuries to the head) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
The 7th character "K" means subsequent encounter for fracture with nonunion: use it for encounters after active treatment, while the patient is healing or recovering.
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 949 (Aftercare with CC/MCC, relative weight 1.123) and DRG 950 (Aftercare without CC/MCC, relative weight 0.7664), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It was added in FY2020, effective October 1, 2019.
7th character
Ksubsequent encounter for fracture with nonunion
CC/MCC status for this injury by encounter: CC for A, K; MCC for B; Neither CC nor MCC for D, G, S.
Other encounter types for S02.121:
Notes that apply from higher levels
Instructions written at a parent level also apply to S02.121K.
› From S02 Fracture of skull and facial bones
- A fracture not indicated as open or closed should be coded to closed
- any associated intracranial injury (S06.-)
Broader instructions also apply from S00-S09 Injuries to the head and Chapter 19: Injury, poisoning and certain other consequences of external causes.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 23 · Factors Influencing Health Status and Other Contacts with Health Services
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2020 (effective 10/1/2019): Added
- No changes since FY2020.
Common questions about S02.121K
Is S02.121K billable?
- Yes. S02.121K is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "K" at the end of S02.121K mean?
- It is the 7th character for subsequent encounter for fracture with nonunion. Per the official guidelines, use it for encounters after active treatment, while the patient is healing or recovering.
Can S02.121K be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict S02.121K as a principal diagnosis.
Is S02.121K a CC or MCC?
- S02.121K is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does S02.121K group to?
- S02.121K is used in the MS-DRG v44.0 logic for MS-DRG 949 (Aftercare with CC/MCC) and MS-DRG 950 (Aftercare without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.