ICD-10-CM 2027
ICD-10 code for facial weak
From the official ICD-10-CM alphabetic index entry “Weak, weakening, weakness (generalized) › facial”. Page updated September 29, 2026.
About coding facial weak
The ICD-10-CM code for facial weak is R29.810 (Facial weakness). The official index lists 7 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R29.810.
Within R29.81 (other symptoms and signs involving the nervous system), R29.810 is specifically for facial weakness. Related codes cover other symptoms and signs involving the nervous system (R29.818).
Don't report R29.810 together with the conditions in its Excludes1 note: Bell's palsy (G51.0) and facial weakness following cerebrovascular disease (I69. with final characters -92).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific facial weak codes (official index)
- following
- cerebrovascular disease I69.992 — Facial weakness following unspecified cerebrovascular disease
- cerebral infarction I69.392 — Facial weakness following cerebral infarction
- intracerebral hemorrhage I69.192 — Facial weakness following nontraumatic intracerebral hemorrhage
- nontraumatic intracranial hemorrhage NEC I69.292 — Facial weakness following other nontraumatic intracranial hemorrhage
- specified disease NEC I69.892 — Facial weakness following other cerebrovascular disease
- stroke I69.392 — Facial weakness following cerebral infarction
- subarachnoid hemorrhage I69.092 — Facial weakness following nontraumatic subarachnoid hemorrhage
Don't confuse with (Excludes1 for R29.810)
Common questions about facial weak ICD-10 codes
What is the ICD-10 code for facial weak?
- R29.810 — Facial weakness. More specific codes apply when the documentation supports them: I69.992, I69.392, I69.192, I69.292 and others below.
Is R29.810 billable?
- Yes. R29.810 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R29.810 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R29.810 as a principal diagnosis.
Is R29.810 a CC or MCC?
- No. R29.810 is neither a CC nor an MCC under MS-DRG v44.0.