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ICD-10-CM 2027 diagnosis code

S02.40CKMaxillary fracture, right side, subsequent encounter for fracture with nonunion

✓ Billable / specificPOA exemptRequires 7th characterCC — complication/comorbidity

S02.40CK is a valid, billable ICD-10-CM code for maxillary fracture, 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: Maxillary fracture, right side, 7thK

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S02.40CK

S02.40CK is the ICD-10-CM diagnosis code for maxillary fracture, 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 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), 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 FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 733.82 (nonunion of fracture).

7th character

Ksubsequent encounter for fracture with nonunion

CC/MCC status for this injury by encounter: CC for A, B, K; Neither CC nor MCC for D, G, S.

Other encounter types for S02.40C:

Notes that apply from higher levels

Instructions written at a parent level also apply to S02.40CK.

› From S02 Fracture of skull and facial bones
Note
  • A fracture not indicated as open or closed should be coded to closed
Code also
  • 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.

ICD-9-CM equivalent

Converter →
  • 733.82Nonunion of fractureapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about S02.40CK

Is S02.40CK billable?

Yes. S02.40CK 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 S02.40CK 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 S02.40CK be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict S02.40CK as a principal diagnosis.

Is S02.40CK a CC or MCC?

S02.40CK is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does S02.40CK group to?

S02.40CK is used in the MS-DRG v44.0 logic for MS-DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC), MS-DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC) and MS-DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for S02.40CK?

The CMS General Equivalence Mappings map S02.40CK to ICD-9-CM 733.82.