S12.121S — Other nondisplaced dens fracture, sequela
Is S12.121S billable?
Yes — S12.121S is billable for FY2027. S12.121S is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S12.121S may be submitted for encounters from October 1, 2026 through September 30, 2027.
S12.121S at a glance
| Code | S12.121S |
|---|---|
| Description | Other nondisplaced dens fracture, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in S12.121S?
In S12.121S, the 7th character S means sequela. The 7th character is required for S12.121S to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S12.121S group to?
S12.121S sits in MDC 08 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 551Medical Back Problems with MCCmedical
- 552Medical Back Problems without MCCmedical
How is S12.121S listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S12.121, the nearest indexed parent of S12.121S. Use them to find the family, then select the specific code.
- Fracture, traumatic › neck › cervical vertebra › second › dens › specified type NEC › nondisplaced (abduction) (adduction) (separation)
Code first — inherited from S12
The underlying condition below must be sequenced before S12.121S. S12.121S describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from Chapter 19
Report an additional code alongside S12.121S to fully describe the condition. S12.121S 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 S12.121S, but a patient may have both at the same time. When documentation supports it, S12.121S and the excluded code may both be reported.
Excludes2 — not included here — inherited from S10-S19
The conditions below are not part of S12.121S, but a patient may have both at the same time. When documentation supports it, S12.121S and the excluded code may both be reported.
How long has S12.121S existed?
S12.121S 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.