ICD-10-CM 2027
ICD-10 code for Trismus
From the official ICD-10-CM alphabetic index entry “Trismus”. Page updated September 29, 2026.
About coding Trismus
The ICD-10-CM code for Trismus is R25.2 (Cramp and spasm). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R25.2.
Within R25 (abnormal involuntary movements), R25.2 is specifically for cramp and spasm. Related codes cover abnormal head movements (R25.0), tremor, unspecified (R25.1), Fasciculation (R25.3), other abnormal involuntary movements (R25.8) and unspecified abnormal involuntary movements (R25.9).
The conditions in its Excludes2 note aren't part of R25.2, but may be coded alongside it if the patient has both: carpopedal spasm (R29.0), charley-horse (M62.831), infantile spasms (G40.4-), muscle spasm of back (M62.830) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Trismus codes (official index)
Common questions about Trismus ICD-10 codes
What is the ICD-10 code for Trismus?
- R25.2 — Cramp and spasm. More specific codes apply when the documentation supports them: A33, A33.
What is the ICD-10 code for neonatorum trismus?
- A33 — Tetanus neonatorum.
What is the ICD-10 code for newborn trismus?
- A33 — Tetanus neonatorum.
Is R25.2 billable?
- Yes. R25.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R25.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R25.2 as a principal diagnosis.
Is R25.2 a CC or MCC?
- No. R25.2 is neither a CC nor an MCC under MS-DRG v44.0.