ICD-10-CM 2027
ICD-10 code for Weak
From the official ICD-10-CM alphabetic index entry “Weak, weakening, weakness (generalized)”. Page updated September 29, 2026.
About coding Weak
The ICD-10-CM code for Weak is R53.1 (Weakness). The official index lists 17 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R53.1.
Within R53 (malaise and fatigue), R53.1 is specifically for weakness. Related codes cover neoplastic (malignant) related fatigue (R53.0), functional quadriplegia (R53.2) and other malaise and fatigue (R53.8).
Don't report R53.1 together with the conditions in its Excludes1 note: age-related weakness (R54), muscle weakness (generalized) (M62.81), sarcopenia (M62.84) and senile asthenia (R54).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Weak codes (official index)
- arches (acquired)
- bladder (sphincter) R32 — Unspecified urinary incontinence
- facial R29.810 — Facial weakness
- 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
- foot (double)
- heart, cardiac
- mind F70 — Mild intellectual disabilities
- muscle M62.81 — Muscle weakness (generalized)
- myocardium
- newborn P96.89 — Other specified conditions originating in the perinatal period
- pelvic fundus N81.89 — Other female genital prolapse
- pubocervical tissue N81.82 — Incompetence or weakening of pubocervical tissue
- senile R54 — Age-related physical debility
- rectovaginal tissue N81.83 — Incompetence or weakening of rectovaginal tissue
- urinary stream R39.12 — Poor urinary stream
- valvular
Don't confuse with (Excludes1 for R53.1)
Common questions about Weak ICD-10 codes
What is the ICD-10 code for Weak?
- R53.1 — Weakness. More specific codes apply when the documentation supports them: R32, R29.810, I69.992, I69.392 and others below.
What is the ICD-10 code for bladder weak?
- R32 — Unspecified urinary incontinence.
What is the ICD-10 code for facial weak?
- R29.810 — Facial weakness.
What is the ICD-10 code for mind weak?
- F70 — Mild intellectual disabilities.
What is the ICD-10 code for muscle weak?
- M62.81 — Muscle weakness (generalized).
What is the ICD-10 code for newborn weak?
- P96.89 — Other specified conditions originating in the perinatal period.
What is the ICD-10 code for pelvic fundus weak?
- N81.89 — Other female genital prolapse.
Is R53.1 billable?
- Yes. R53.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R53.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R53.1 as a principal diagnosis.
Is R53.1 a CC or MCC?
- No. R53.1 is neither a CC nor an MCC under MS-DRG v44.0.