ICD-10-CM 2027
ICD-10 code for coordination lack of
From the official ICD-10-CM alphabetic index entry “Lack of › coordination”. Page updated September 29, 2026.
About coding coordination lack of
The ICD-10-CM code for coordination lack of is R27.9 (Unspecified lack of coordination). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R27.9.
Within R27, choose R27.9 (Unspecified lack of coordination) only when documentation doesn't support a more specific option: ataxia, unspecified (R27.0) and other lack of coordination (R27.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 091 (Other Disorders of Nervous System with MCC, relative weight 1.7046), DRG 092 (Other Disorders of Nervous System with CC, relative weight 1.0239) and DRG 093 (Other Disorders of Nervous System without CC/MCC, relative weight 0.7783), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific coordination lack of codes (official index)
Common questions about coordination lack of ICD-10 codes
What is the ICD-10 code for coordination lack of?
- R27.9 — Unspecified lack of coordination. More specific codes apply when the documentation supports them: R27.0, R27.8.
What is the ICD-10 code for ataxia coordination lack of?
- R27.0 — Ataxia, unspecified.
Is R27.9 billable?
- Yes. R27.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R27.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R27.9 as a principal diagnosis.
Is R27.9 a CC or MCC?
- No. R27.9 is neither a CC nor an MCC under MS-DRG v44.0.