S25.121A — Major laceration of right innominate or subclavian artery, initial encounter
Is S25.121A billable?
Yes — S25.121A is billable for FY2027. S25.121A is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S25.121A may be submitted for encounters from October 1, 2026 through September 30, 2027.
S25.121A at a glance
| Code | S25.121A |
|---|---|
| Description | Major laceration of right innominate or subclavian artery, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in S25.121A?
In S25.121A, the 7th character A means initial encounter. The 7th character is required for S25.121A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S25.121A group to?
S25.121A sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 791Prematurity with Major Problemsmedical
As a secondary diagnosis, S25.121A is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is S25.121A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S25.12, the nearest indexed parent of S25.121A. Use them to find the family, then select the specific code.
- Injury › blood vessel NEC › thoracic › innominate › artery › laceration › major
Use additional code — inherited from Chapter 19
Report an additional code alongside S25.121A to fully describe the condition. S25.121A 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 S25.121A, but a patient may have both at the same time. When documentation supports it, S25.121A and the excluded code may both be reported.
Excludes2 — not included here — inherited from S20-S29
The conditions below are not part of S25.121A, but a patient may have both at the same time. When documentation supports it, S25.121A and the excluded code may both be reported.
- burns and corrosions (T20-T32)
- effects of foreign body in bronchus (T17.5)
- effects of foreign body in esophagus (T18.1)
- effects of foreign body in lung (T17.8)
- effects of foreign body in trachea (T17.4)
- frostbite (T33-T34)
- injuries of axilla
- injuries of clavicle
- injuries of scapular region
- injuries of shoulder
- insect bite or sting, venomous (T63.4)
Code also — inherited from S25
Two codes may be needed to describe the condition fully. Whether S25.121A is sequenced first depends on the reason for the encounter.
- any associated open wound (S21.-)
How long has S25.121A existed?
S25.121A 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.